A DHCP unique identifier (DUID) uniquely identifies a DHCPv6 device (DHCPv6 client, server, or relay agent). A DHCPv6 device adds its DUID in a sent packet.

This command displays output only after the DHCPv6 process is running on the device.

Examples

# Display the DUID of the local device.

<Sysname> display ipv6 dhcp duid

The DUID of this device: 0003000100e0fc005552.

ipv6 dhcp dscp

Use ipv6 dhcp dscp to set the DSCP value for the DHCPv6 packets sent by the DHCPv6 server or the DHCPv6 relay agent.

Use undo ipv6 dhcp dscp to restore the default.

Syntax

ipv6 dhcp dscp dscp-value

undo ipv6 dhcp dscp

Default

The DSCP value is 56 in DHCPv6 packets sent by the DHCPv6 server or the DHCPv6 relay agent.

Views

System view

Predefined user roles

network-admin

context-admin

Parameters

dscp-value: Specifies the DSCP value for DHCPv6 packets, in the range of 0 to 63.

Usage guidelines

The DSCP value of a packet specifies the priority level of the packet and affects the transmission priority of the packet. A bigger DSCP value represents a higher priority.

Examples

# Set the DSCP value to 30 for DHCPv6 packets sent by the DHCPv6 server or the DHCPv6 relay agent.

<Sysname> system-view

[Sysname] ipv6 dhcp dscp 30

ipv6 dhcp log enable

Use ipv6 dhcp log enable to enable DHCPv6 server logging.

Use undo ipv6 dhcp log enable to disable DHCPv6 server logging.

Syntax

ipv6 dhcp log enable

undo ipv6 dhcp log enable

Default

DHCPv6 server logging is disabled.

Views

System view

Predefined user roles

network-admin

context-admin

Usage guidelines

This command enables the DHCPv6 server to generate DHCPv6 logs and send them to the information center. The log information helps administrators locate and solve problems. For information about the log destination and output rule configuration in the information center, see Network Management and Monitoring Configuration Guide.

As a best practice, disable this feature if the log generation affects the device performance or reduces the address and prefix allocation efficiency. For example, this situation might occur when a large number of clients frequently come online or go offline.

Examples

# Enable DHCPv6 server logging.

<Sysname> system-view

[Sysname] ipv6 dhcp log enable

ipv6 dhcp select

Use ipv6 dhcp select to enable the DHCPv6 server or DHCPv6 relay agent on an interface.

Use undo ipv6 dhcp select to restore the default.

Syntax

ipv6 dhcp select { relay | server }

undo ipv6 dhcp select

Default

An interface does not work in the DHCPv6 server mode or in the DHCPv6 relay agent mode. It discards DHCPv6 packets from DHCPv6 clients.

Views

Interface view

Predefined user roles

network-admin

context-admin

Parameters

relay: Enables the DHCPv6 relay agent on the interface.

server: Enables the DHCPv6 server on the interface.

Usage guidelines

Before changing the DHCPv6 server mode to the DHCPv6 relay agent mode on an interface, use the following commands to remove IPv6 address/prefix bindings:

· reset ipv6 dhcp server ip-in-use

· reset ipv6 dhcp server pd-in-use

Do not configure the DHCPv6 client on the interface that has been configured as the DHCPv6 relay agent or DHCPv6 server.

Examples

# Enable the DHCPv6 server on GigabitEthernet 1/0/1.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] ipv6 dhcp select server

# Enable the DHCPv6 relay agent on GigabitEthernet 1/0/2.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/2

[Sysname-GigabitEthernet1/0/2] ipv6 dhcp select relay

Related commands

display ipv6 dhcp relay server-address

display ipv6 dhcp server

DHCPv6 server commands

address range

Use address range to specify a non-temporary IPv6 address range in a DHCPv6 address pool for dynamic allocation.

Use undo address range to restore the default.

Syntax

address range start-ipv6-address end-ipv6-address [ preferred-lifetime preferred-lifetime valid-lifetime valid-lifetime ]

undo address range

Default

No non-temporary IPv6 address range exists.

Views

DHCPv6 address pool view

Predefined user roles

network-admin

context-admin

Parameters

start-ipv6-address: Specifies the start IPv6 address.

end-ipv6-address: Specifies the end IPv6 address.

preferred-lifetime preferred-lifetime: Specifies the preferred lifetime for the non-temporary IPv6 addresses. The value range is 60 to 4294967295 seconds, and the default is 604800 seconds (7 days).

valid-lifetime valid-lifetime: Specifies the valid lifetime for the non-temporary IPv6 addresses. The value range is 60 to 4294967295 seconds, and the default is 2592000 seconds (30 days). The valid lifetime cannot be shorter than the preferred lifetime.

Usage guidelines

If you do not specify a non-temporary IPv6 address range, all unicast addresses on the subnet specified by the network command in address pool view are assignable. If you specify a non-temporary IPv6 address range, only the IPv6 addresses in the specified IPv6 address range are assignable.

You can specify only one non-temporary IPv6 address range in an address pool. If you execute this command multiple times, the most recent configuration takes effect.

The non-temporary IPv6 address range specified by the address range command must be on the subnet specified by the network command.

Examples

# Configure a non-temporary IPv6 address range from 3ffe:501:ffff:100::10 through 3ffe:501:ffff:100::31 in address pool 1.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1] network 3ffe:501:ffff:100::/64

[Sysname-dhcp6-pool-1] address range 3ffe:501:ffff:100::10 3ffe:501:ffff:100::31

Related commands

display ipv6 dhcp pool

network

temporary address range

class pool

Use class pool to specify a DHCPv6 address pool for a DHCPv6 user class.

Use undo class pool to restore the default.

Syntax

class class-name pool pool-name

undo class class-name pool

Default

No DHCPv6 address pool is specified for a DHCPv6 user class.

Views

DHCPv6 policy view

Predefined user roles

network-admin

context-admin

Parameters

class-name: Specifies a DHCPv6 user class by its name, a case-insensitive string of 1 to 63 characters.

pool-name: Specifies a DHCPv6 address pool by its name, a case-insensitive string of 1 to 63 characters.

Usage guidelines

You can specify only one DHCPv6 address pool for a DHCPv6 user class in a DHCPv6 policy. If you execute this command multiple times for a user class, the most recent configuration takes effect.

Examples

# Specify DHCPv6 address pool pool1 for DHCPv6 user class test in DHCPv6 policy 1.

<Sysname> system-view

[Sysname] ipv6 dhcp policy 1

[Sysname-dhcp6-policy-1] class test pool pool1

Related commands

default pool

ipv6 dhcp policy

ipv6 dhcp pool

default pool

Use default pool to specify the default DHCPv6 address pool.

Use undo default pool to restore the default.

Syntax

default pool pool-name

undo default pool

Default

No default DHCPv6 address pool is specified.

Views

DHCPv6 policy view

Predefined user roles

network-admin

context-admin

Parameters

pool-name: Specifies a DHCPv6 address pool by its name, a case-insensitive string of 1 to 63 characters.

Usage guidelines

In a DHCPv6 policy, the DHCPv6 server uses the default address pool to assign IPv6 address, IPv6 prefix, or other parameters to clients that do not match any user classes. If no default address pool is specified or the default address pool does not have assignable IPv6 addresses or prefixes, the assignment fails.

You can specify only one default address pool in a DHCPv6 policy. If you execute this command multiple times, the most recent configuration takes effect.

Examples

# Specify the DHCPv6 address pool pool1 as the default DHCPv6 address pool in DHCPv6 policy 1.

<Sysname> system-view

[Sysname] ipv6 dhcp policy 1

[Sysname-dhcp6-policy-1] default pool pool1

Related commands

class pool

ipv6 dhcp policy

display ipv6 dhcp option-group

Use display ipv6 dhcp option-group to display information about a DHCPv6 option group.

Syntax

display ipv6 dhcp option-group [ option-group-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

context-admin

context-operator

Parameters

option-group-number: Specifies a static or dynamic DHCPv6 option group by its ID. The value range for the option group ID is 1 to 100. If you do not specify an option group, this command displays information about all DHCPv6 option groups.

Usage guidelines

A static DHCPv6 option group is created by using the ipv6 dhcp option-group command.

A dynamic DHCPv6 option group is created automatically by a DHCPv6 client after it obtains the DHCPv6 configuration parameters. Dynamic option groups cannot be manually modified or deleted.

Examples

# Display information about all DHCPv6 option groups.

<Sysname> display ipv6 dhcp option-group

DHCPv6 option group: 1

DNS server addresses:

Type: Static

Interface: N/A

1::1

DNS server addresses:

Type: Dynamic (DHCPv6 address allocation)

Interface: GigabitEthernet1/0/1

1::1

Domain name:

Type: Static

Interface: N/A

aaa.com

Domain name:

Type: Dynamic (DHCPv6 address allocation)

Interface: GigabitEthernet1/0/1

aaa.com

Options:

Code: 23

Type: Dynamic (DHCPv6 prefix allocation)

Interface: GigabitEthernet1/0/1

Length: 2 bytes

Hex: ABCD

DHCPv6 option group: 20

DNS server addresses:

Type: Static

Interface: N/A

1::1

DNS server addresses:

Type: Dynamic (DHCPv6 address allocation)

Interface: GigabitEthernet1/0/1

1::1

Domain name:

Type: Static

Interface: N/A

aaa.com

Domain name:

Type: Dynamic (DHCPv6 address allocation)

Interface: GigabitEthernet1/0/1

aaa.com

Options:

Code: 23

Type: Dynamic (DHCPv6 prefix allocation)

Interface: GigabitEthernet1/0/1

Length: 2 bytes

Hex: ABCD

Table 1 Command output

Field	Description
DHCPv6 option group	ID of the DHCPv6 option group.
Type	Types of the DHCPv6 option: · Static—Parameter in a static DHCPv6 option group. · Dynamic (DHCPv6 address allocation)—Parameter in a dynamic DHCPv6 option group created during IPv6 address acquisition. · Dynamic (DHCPv6 prefix allocation)—Parameters in a dynamic DHCPv6 option group created during IPv6 prefix acquisition. · Dynamic (DHCPv6 address and prefix allocation)—Parameters in a dynamic DHCPv6 option group created during IPv6 address and prefix acquisition.
Interface	Interface name.
DNS server addresses	IPv6 address of the DNS server.
Domain name	Domain name suffix.
SIP server addresses	IPv6 address of the SIP server.
SIP server domain names	Domain name of the SIP server.
Options	Self-defined options.
Code	Code of the self-defined option.
Length	Self-defined option length in bytes.
Hex	Self-defined option content represented by a hexadecimal number.

Related commands

ipv6 dhcp option-group

display ipv6 dhcp pool

Use display ipv6 dhcp pool to display information about a DHCPv6 address pool.

Syntax

display ipv6 dhcp pool [ pool-name | vpn-instance vpn-instance-name ]

Views

Any view

Predefined user roles

network-admin

network-operator

context-admin

context-operator

Parameters

pool-name: Displays information about the specified DHCPv6 address pool. The pool name is a case-insensitive string of 1 to 63 characters. If you do not specify a DHCPv6 address pool, this command displays information about all DHCPv6 address pools.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If you do not specify a VPN instance, this command displays information about DHCPv6 address pools for the public network.

Examples

# Display information about DHCPv6 address pool 1.

<Sysname> display ipv6 dhcp pool 1

DHCPv6 pool: 1

Network: 3FFE:501:FFFF:100::/64

Preferred lifetime 604800 seconds, valid lifetime 2592000 seconds

Prefix pool: 1

Preferred lifetime 24000 seconds, valid lifetime 36000 seconds

Addresses:

Range: from 3FFE:501:FFFF:100::1

to 3FFE:501:FFFF:100::99

Preferred lifetime 70480 seconds, valid lifetime 200000 seconds

Total address number: 153

Available: 153

In-use: 0

Temporary addresses:

Range: from 3FFE:501:FFFF:100::200

to 3FFE:501:FFFF:100::210

Preferred lifetime 60480 seconds, valid lifetime 259200 seconds

Total address number: 17

Available: 17

In-use: 0

Static bindings:

DUID: 0003000100e0fc000001

IAID: 0000003f

Prefix: 3FFE:501:FFFF:200::/64

Preferred lifetime 604800 seconds, valid lifetime 2592000 seconds

Description: ClientA

DUID: 0003000100e0fc00cff1

IAID: 00000001

Address: 3FFE:501:FFFF:2001::1/64

Preferred lifetime 604800 seconds, valid lifetime 2592000 seconds

Description: ClientB

DNS server addresses:

2::2

Domain name:

aaa.com

SIP server addresses:

5::1

SIP server domain names:

bbb.com

# Display information about DHCPv6 address pool 1.

<Sysname> display ipv6 dhcp pool 1

DHCPv6 pool: 1

Network: Not-available

Preferred lifetime 604800 seconds, valid lifetime 2592000 seconds

# Display information about DHCPv6 address pool 1.

<Sysname> display ipv6 dhcp pool 1

DHCPv6 pool: 1

Network: 1::/64(Zombie)

Preferred lifetime 604800 seconds, valid lifetime 2592000 seconds

Table 2 Command output

Field	Description
DHCPv6 pool	Name of the DHCPv6 address pool.
Network	IPv6 subnet for dynamic IPv6 address allocation. If the subnet prefix is ineffective, this field displays Not-available. If the subnet prefix becomes ineffective after a configuration recovery (for example, a switchover from the backup to the master), the prefix is marked (Zombie).
Prefix pool	Prefix pool referenced by the address pool.
Preferred lifetime	Preferred lifetime in seconds.
valid lifetime	Valid lifetime in seconds.
Addresses	Non-temporary IPv6 address range.
Range	IPv6 address range for dynamic allocation.
Total address number	Total number of IPv6 addresses.
Available	Total number of available IPv6 addresses.
In-use	Total number of assigned IPv6 addresses.
Temporary addresses	Temporary IPv6 address range for dynamic allocation.
Static bindings	Static bindings configured in the address pool.
DUID	Client DUID.
IAID	Client IAID. If no IAID is configured, this field displays Not configured.
Prefix	IPv6 address prefix.
Address	Static IPv6 address.
Description	Description of the static binding.
DNS server addresses	DNS server address.
Domain name	Domain name.
SIP server addresses	SIP server address.
SIP server domain names	Domain name of the SIP server.

display ipv6 dhcp prefix-pool

Use display ipv6 dhcp prefix-pool to display information about a prefix pool.

Syntax

display ipv6 dhcp prefix-pool [ prefix-pool-number ] [ vpn-instance vpn-instance-name ]

Views

Any view

Predefined user roles

network-admin

network-operator

context-admin

context-operator

Parameters

prefix-pool-number: Displays detailed information about a prefix pool specified by its number in the range of 1 to 128. If you do not specify a prefix pool, this command displays brief information about all prefix pools.

Examples

# Display brief information about all prefix pools.

<Sysname> display ipv6 dhcp prefix-pool

Prefix-pool Prefix Available In-use Static

1 5::/64 64 0 0

# Display brief information about all prefix pools.

<Sysname> display ipv6 dhcp prefix-pool

Prefix-pool Prefix Available In-use Static

2 Not-available 0 0 0

# Display brief information about all prefix pools.

<Sysname> display ipv6 dhcp prefix-pool

Prefix-pool Prefix Available In-use Static

11 21::/112(Zombie) 0 64 0

# Display detailed information about prefix pool 1.

<Sysname> display ipv6 dhcp prefix-pool 1

Prefix: 5::/64

Assigned length: 70

Total prefix number: 64

Available: 64

In-use: 0

Static: 0

# Display detailed information about prefix pool 1.

<Sysname> display ipv6 dhcp prefix-pool 1

Prefix: Not-available

Assigned length: 70

Total prefix number: 0

Available: 0

In-use: 0

Static: 0

# Display detailed information about prefix pool 1.

<Sysname> display ipv6 dhcp prefix-pool 1

Prefix: 5::/64(Zombie)

Assigned length: 70

Total prefix number: 10

Available: 0

In-use: 10

Static: 0

Table 3 Command output

Field	Description
Prefix-pool	Prefix pool number.
Prefix	Prefix specified in the prefix pool. If the prefix is ineffective, this field displays Not-available. If the prefix becomes ineffective after a configuration recovery (for example, a switchover from the backup to the master), the prefix is marked (Zombie).
Available	Number of available prefixes.
In-use	Number of assigned prefixes.
Static	Number of statically bound prefixes.
Assigned length	Length of assigned prefixes.
Total prefix number	Number of prefixes.

display ipv6 dhcp server

Use display ipv6 dhcp server to display DHCPv6 server configuration information.

Syntax

display ipv6 dhcp server [ interface interface-type interface-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

context-admin

context-operator

Parameters

interface interface-type interface-number: Displays DHCPv6 server configuration information for the specified interface. If you do not specify an interface, this command displays DHCPv6 server configuration information for all interfaces.

Examples

# Display DHCPv6 server configuration information for all interfaces.

<Sysname> display ipv6 dhcp server

Interface Pool

GigabitEthernet1/0/1 1

GigabitEthernet1/0/2 global

# Display DHCPv6 server configuration information for the interface GigabitEthernet 1/0/1.

<Sysname> display ipv6 dhcp server interface gigabitethernet 1/0/1

Using pool: 1

Preference value: 0

Allow-hint: Enabled

Rapid-commit: Disabled

Table 4 Command output

Field	Description
Interface	Interface enabled with DHCPv6 server.
Pool	Address pool applied to the interface. If no address pool is applied to the interface, global is displayed. The DHCPv6 server selects a global address pool to assign a prefix, an address, and other configuration parameters to a client.
Using pool	Address pool applied to the interface. If no address pool is applied to the interface, global is displayed. The DHCPv6 server selects a global address pool to assign a prefix, an address, and other configuration parameters to a client.
Preference value	Server preference in the DHCPv6 Advertise message. The value range is 0 to 255. The bigger the value is, the higher preference the server has.
Allow-hint	Indicates whether desired address/prefix assignment is enabled.
Rapid-commit	Indicates whether rapid address/prefix assignment is enabled.

display ipv6 dhcp server conflict

Use display ipv6 dhcp server conflict to display information about IPv6 address conflicts.

Syntax

display ipv6 dhcp server conflict [ address ipv6-address ] [ vpn-instance vpn-instance-name ]

Views

Any view

Predefined user roles

network-admin

network-operator

context-admin

context-operator

Parameters

address ipv6-address: Displays conflict information for the specified IPv6 address. If you do not specify an IPv6 address, this command displays information about all IPv6 address conflicts.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If you do not specify a VPN instance, this command displays IPv6 address conflict information for the public network.

Usage guidelines

The DHCPv6 server creates IP address conflict information in the following conditions:

· The DHCPv6 client sends a DECLINE packet to the DHCPv6 server to inform the server of an IPv6 address conflict.

· The DHCPv6 server discovers that the only assignable address in the address pool is its own IPv6 address.

Examples

# Display information about all address conflicts.

<Sysname> display ipv6 dhcp server conflict

IPv6 address Detect time

2001::1 Apr 25 16:57:20 2019

1::1:2 Apr 25 17:00:10 2019

Table 5 Command output

Field	Description
IPv6 address	Conflicted IPv6 address.
Detect time	Time when the conflict was discovered.

Related commands

reset ipv6 dhcp server conflict

display ipv6 dhcp server database

Use display ipv6 dhcp server database to display information about DHCPv6 binding auto backup.

Syntax

display ipv6 dhcp server database

Views

Any view

Predefined user roles

network-admin

network-operator

context-admin

context-operator

Examples

# Display information about DHCPv6 binding auto backup.

<Sysname> display ipv6 dhcp server database

File name : database.dhcp

Username :

Password :

Update interval : 600 seconds

Latest write time : Feb 8 16:02:23 2014

Status : Last write succeeded.

Table 6 Command output

Field	Description
File name	Name of the DHCPv6 binding backup file.
Username	Username for accessing the URL of the remote backup file.
Password	Password for accessing the URL of the remote backup file. This field displays ****** if a password is configured.
Update interval	Waiting time in seconds after a DHCPv6 binding change for the DHCPv6 server to update the backup file.
Latest write time	Time of the latest update.
Status	Status of the update: · Writing—The backup file is being updated. · Last write succeeded—The backup file was successfully updated. · Last write failed—The backup file failed to be updated.

display ipv6 dhcp server expired

Use display ipv6 dhcp server expired to display lease expiration information.

Syntax

display ipv6 dhcp server expired [ [ address ipv6-address ] [ vpn-instance vpn-instance-name ] | pool pool-name ]

Views

Any view

Predefined user roles

network-admin

network-operator

context-admin

context-operator

Parameters

address ipv6-address: Displays lease expiration information for the specified IPv6 address. If you do not specify an IPv6 address, this command displays lease expiration information for all IPv6 addresses.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If you do not specify a VPN instance, this command displays lease expiration information about IPv6 addresses for the public network.

pool pool-name: Displays lease expiration information for the DHCPv6 address pool specified by its name, a case-insensitive string of 1 to 63 characters. If you do not specify a DHCPv6 address pool, this command displays lease expiration information for all DHCPv6 address pools.

Usage guidelines

DHCPv6 assigns the expired IPv6 addresses to DHCPv6 clients when all available addresses have been assigned.

Examples

# Display all lease expiration information.

<Sysname> display ipv6 dhcp server expired

IPv6 address DUID Lease expiration

2001:3eff:fe80:4caa: 3030-3066-2e65-3230-302e- Apr 25 17:10:47 2019

37ee:7::1 3130-3234-2d45-7468-6572-

6e65-7430-2f31

Table 7 Command output

Field	Description
IPv6 address	Expired IPv6 address.
DUID	Client DUID bound to the expired IPv6 address.
Lease expiration	Time when the lease expired.

Related commands

reset ipv6 dhcp server expired

display ipv6 dhcp server ip-in-use

Use display ipv6 dhcp server ip-in-use to display binding information for assigned IPv6 addresses.

Syntax

display ipv6 dhcp server ip-in-use [ [ address ipv6-address ] [ vpn-instance vpn-instance-name ] | pool pool-name ]

Views

Any view

Predefined user roles

network-admin

network-operator

context-admin

context-operator

Parameters

address ipv6-address: Displays binding information for the specified IPv6 address. If you do not specify an IPv6 address, this command displays binding information for all IPv6 addresses.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If you do not specify a VPN instance, this command displays binding information about IPv6 addresses for the public network.

pool pool-name: Displays IPv6 address binding information for the DHCPv6 address pool specified by its name, a case-insensitive string of 1 to 63 characters. If you do not specify a DHCPv6 address pool, this command displays IPv6 address binding information for all DHCPv6 address pools.

Examples

# Display binding information for all assigned IPv6 address.

<Sysname> display ipv6 dhcp server ip-in-use

Pool: 1

IPv6 address Hardware address Type Lease expiration

2:1::1 0125-0354-aab2 Auto(O) Jul 10 19:45:01 2019

Pool: 2

IPv6 address Hardware address Type Lease expiration

1:1::2 1325-0714-a3ec Static(F) Not available

Pool: 3

IPv6 address Hardware address Type Lease expiration

1:2::1F1 bb43-1314-bb32 Static(O) Oct 9 09:23:31 2019

Pool: 4

IPv6 address Hardware address Type Lease expiration

2001:2F01:3EE3:3200: ac22-5456-ee76 Auto(Z) Oct 11 09:23:31 2019

E013:7A86:5905:2012

# Display binding information for all assigned IPv6 addresses for the specified DHCPv6 address pool.

<Sysname> display ipv6 dhcp server ip-in-use pool 1

Pool: 1

IPv6 address Hardware address Type Lease expiration

2:1::1 0125-0354-aab2 Auto(O) Jul 10 22:22:22 2019

3:1::2 1563-8654-e2a3 Static(C) Jan 1 11:11:11 2019

# Display binding information for the specified IPv6 address.

<Sysname> display ipv6 dhcp server ip-in-use address 2:1::3

Pool: 1

Client: FE80::C800:CFF0:FE18:0

Hardware address: 3674-0832-eab3

Type: Auto(O)

DUID: 00030001CA000C180000

IAID: 0x00030001

IPv6 address: 2:1::3

Preferred lifetime 400 seconds, valid lifetime 500 seconds

Expires at Jul 10 09:45:01 2019 (288 seconds left)

Table 8 Command output

Field	Description
Pool	DHCPv6 address pool.
IPv6 address	IPv6 address assigned.
Hardware address	Hardware address of a DHCPv6 client. In a network with DHCPv6 relay agent, this field displays N/A because the DHCPv6 server cannot obtain the hardware address of the client.
Type	IPv6 address binding types: · Static(F)—Free static binding whose IPv6 address has not been assigned. · Static(O)—Offered static binding whose IPv6 address has been selected and sent by the DHCPv6 server in a DHCPv6-OFFER packet to the client. · Static(C)—Committed static binding whose IPv6 address has been assigned to the client. · Auto(O)—Offered dynamic binding whose IPv6 address has been dynamically selected by the DHCPv6 server and sent in a DHCPv6-OFFER packet to the DHCPv6 client. · Auto(C)—Committed dynamic binding whose IPv6 address has been dynamically assigned to the DHCPv6 client. · Auto(Z)—Zombie dynamic binding whose IPv6 address has been dynamically assigned to the DHCPv6 client. The binding becomes zombie because the subnet prefix goes invalid for address allocation after a configuration recovery, for example, after a switchover from the backup to the master.
Lease-expiration	Time when the lease of the IPv6 address will expire. If the lease expires after the year 2100, this field displays Expires after 2100. For an unassigned static binding, this field displays Not available.
Client	IPv6 address of the DHCPv6 client. For an unassigned static binding, this field is blank.
DUID	Client DUID.
IAID	Client IAID. For an unassigned static binding without IAID specified, this field displays N/A.
Preferred lifetime	Preferred lifetime in seconds of the IPv6 address.
valid lifetime	Valid lifetime in seconds of the IPv6 address.
Expires at	Time when the lease of an IPv6 address will expire. If the lease expires after the year 2100, this field displays Expires after 2100.

Related commands

reset ipv6 dhcp server ip-in-use

display ipv6 dhcp server pd-in-use

Use display ipv6 dhcp server pd-in-use to display binding information for the assigned IPv6 prefixes.

Syntax

display ipv6 dhcp server pd-in-use [ pool pool-name | [ prefix prefix/prefix-len ] [ vpn-instance vpn-instance-name ] ]

Views

Any view

Predefined user roles

network-admin

network-operator

context-admin

context-operator

Parameters

pool pool-name: Displays IPv6 prefix binding information for the DHCPv6 address pool specified by its name, a case-insensitive string of 1 to 63 characters. If you do not specify a DHCPv6 address pool, this command displays IPv6 prefix binding information for all DHCPv6 address pools.

prefix prefix/prefix-len: Displays binding information for the specified IPv6 prefix. The value range for the prefix length is 1 to 128. If you do not specify an IPv6 prefix, this command displays binding information for all IPv6 prefixes.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If you do not specify a VPN instance, this command displays binding information about IPv6 prefixes for the public network.

Examples

# Display all IPv6 prefix binding information.

<Sysname> display ipv6 dhcp server pd-in-use

Pool: 1

IPv6 prefix Hardware address Type Lease expiration

2:1::/24 0125-0354-aab2 Auto(O) Jul 10 19:45:01 2019

Pool: 2

IPv6 prefix Hardware address Type Lease expiration

1:1::/64 1325-0714-a3ec Static(F) Not available

Pool: 3

IPv6 prefix Hardware address Type Lease expiration

1:2::/64 bb43-1314-bb32 Static(O) Oct 9 09:23:31 2019

Pool: 4

IPv6 prefix Hardware address Type Lease expiration

12::/80 ac22-5456-ee76 Auto(Z) Oct 17 09:34:59 2019

# Display IPv6 prefix binding information for DHCPv6 address pool 1.

<Sysname> display ipv6 dhcp server pd-in-use pool 1

Pool: 1

IPv6 prefix Hardware address Type Lease expiration

2:1::/24 0125-0354-aab2 Auto(O) Jul 10 22:22:22 2019

3:1::/64 1563-8654-e2a3 Static(C) Jan 1 11:11:11 2019

# Display binding information for the IPv6 prefix 2:1::3/24.

<Sysname> display ipv6 dhcp server pd-in-use prefix 2:1::3/24

Pool: 1

Client: FE80::C800:CFF:FE18:0

Hardware address: 3674-0832-eab3

Type: Auto(O)

DUID: 00030001CA000C180000

IAID: 0x00030001

IPv6 prefix: 2:1::/24

Preferred lifetime 400 seconds, valid lifetime 500 seconds

Expires at Jul 10 09:45:01 2019 (288 seconds left)

Table 9 Command output

Field	Description
IPv6 prefix	IPv6 prefix assigned.
Hardware address	Hardware address of a DHCPv6 client. In a network with DHCPv6 relay agent, this field displays N/A because the DHCPv6 server cannot obtain the hardware address of the client.
Type	Prefix binding types: · Static(F)—Free static binding whose IPv6 prefix has not been assigned. · Static(O)—Offered static binding whose IPv6 prefix has been selected and sent by the DHCPv6 server in a DHCPv6-OFFER packet to the client. · Static(C)—Committed static binding whose IPv6 prefix has been assigned to the client. · Auto(O)—Offered dynamic binding whose IPv6 prefix has been dynamically selected by the DHCPv6 server and sent in a DHCPv6-OFFER packet to the DHCPv6 client. · Auto(C)—Committed dynamic binding whose IPv6 prefix has been dynamically assigned to the DHCPv6 client. · Auto(Z)—Zombie dynamic binding whose IPv6 prefix has been dynamically assigned to the DHCPv6 client. The binding becomes zombie because the prefix in the prefix pool goes invalid after a configuration recovery, for example, after a switchover from the backup to the master.
Pool	Address pool.
Lease-expiration	Time when the lease of the IPv6 prefix will expire. If the lease will expire after the year 2100, this field displays Expires after 2100. For an unassigned static binding, this field displays Not available.
Client	IPv6 address of the DHCPv6 client. For an unassigned static binding, this field is blank.
DUID	Client DUID.
IAID	Client IAID. For an unassigned static binding without IAID, this field displays N/A.
Preferred lifetime	Preferred lifetime in seconds of the IPv6 prefix.
valid lifetime	Valid lifetime in seconds of the IPv6 prefix.
Expires at	Time when the lease of the prefix will expire. If the lease expires after the year 2100, this field displays Expires after 2100.

Related commands

reset ipv6 dhcp server pd-in-use

display ipv6 dhcp server statistics

Use display ipv6 dhcp server statistics to display DHCPv6 packet statistics on the DHCPv6 server.

Syntax

display ipv6 dhcp server statistics [ pool pool-name | vpn-instance vpn-instance-name ]

Views

Any view

Predefined user roles

network-admin

network-operator

context-admin

context-operator

Parameters

pool pool-name: Displays DHCPv6 packet statistics for the DHCPv6 address pool specified by its name, a case-insensitive string of 1 to 63 characters. If you do not specify an address pool, this command displays DHCPv6 packet statistics for all address pools.

Examples

# Display all DHCPv6 packet statistics on the DHCPv6 server.

<Sysname> display ipv6 dhcp server statistics

Bindings:

Ip-in-use : 1

Pd-in-use : 0

Expired : 0

Conflict : 0

Packets received : 1

Solicit : 1

Request : 0

Confirm : 0

Renew : 0

Rebind : 0

Release : 0

Decline : 0

Information-request : 0

Relay-forward : 0

Packets dropped : 0

Packets sent : 0

Advertise : 0

Reconfigure : 0

Reply : 0

Relay-reply : 0

Table 10 Command output

Field	Description
Bindings	Number of bindings: · Ip-in-use—Total number of address bindings. · Pd-in-use—Total number of prefix bindings. · Expired—Total number of expired address bindings.
Conflict	Total number of conflicted addresses. If statistics about an address pool are displayed, this field is not displayed.
Packets received	Number of messages received by the DHCPv6 server. The message types include: · Solicit. · Request. · Confirm. · Renew. · Rebind. · Release. · Decline. · Information-request. · Relay-forward. If statistics about an address pool are displayed, this field is not displayed.
Packets dropped	Number of packets discarded. If statistics about an address pool are displayed, this field is not displayed.
Packets sent	Number of messages sent by the DHCPv6 server. The message types include: · Advertise. · Reconfigure. · Reply. · Relay-reply. If statistics about an address pool are displayed, this field is not displayed.

Related commands

reset ipv6 dhcp server statistics

dns-server

Use dns-server to specify a DNS server in a DHCPv6 address pool.

Use undo dns-server to remove the specified DNS server from a DHCPv6 address pool.

Syntax

dns-server ipv6-address

undo dns-server ipv6-address

Default

No DNS server address is specified.

Views

DHCPv6 address pool view

DHCPv6 option group view

Predefined user roles

network-admin

context-admin

Parameters

ipv6-address: Specifies the IPv6 address of a DNS server.

Usage guidelines

You can use the dns-server command to specify up to eight DNS servers in an address pool. A DNS server specified earlier has a higher preference.

Examples

# Specify the DNS server address 2:2::3 in DHCPv6 address pool 1.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1] dns-server 2:2::3

Related commands

display ipv6 dhcp pool

domain-name

Use domain-name to specify a domain name in a DHCPv6 address pool.

Use undo domain-name to restore the default.

Syntax

domain-name domain-name

undo domain-name

Default

No domain name is specified.

Views

DHCPv6 address pool view

DHCPv6 option group view

Predefined user roles

network-admin

context-admin

Parameters

domain-name: Specifies a domain name, a case-sensitive string of 1 to 50 characters.

Usage guidelines

You can configure only one domain name in an address pool. If you execute this command multiple times, the most recent configuration takes effect.

Examples

# Specify the domain name aaa.com in DHCPv6 address pool 1.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1] domain-name aaa.com

Related commands

display ipv6 dhcp pool

if-match

Use if-match to configure a match rule for a DHCPv6 user class.

Use undo if-match to delete a match rule for a DHCP user class.

Syntax

if-match rule rule-number { option option-code [ ascii ascii-string [ offset offset | partial ] | hex hex-string [ mask mask | offset offset length length | partial ] ] | relay-agent gateway-ipv6-address }

undo if-match rule rule-number

Default

No match rules are configured for the DHCPv6 user class.

Views

DHCPv6 user class view

Predefined user roles

network-admin

context-admin

Parameters

rule rule-number: Assigns the match rule an ID in the range of 1 to 128. A smaller ID represents a higher match priority.

option option-code: Specifies a DHCPv6 option by its number in the range of 1 to 65535.

ascii ascii-string: Specifies an ASCII string of 1 to 128 characters.

offset offset: Specifies the offset in bytes after which the match operation starts. The value range is 0 to 65534. If you specify an ASCII string, a packet matches the rule if the option content after the offset is the same as the ASCII string. If you specify a hexadecimal number, a packet matches the rule if the option content of the specified length after the offset is the same as the hexadecimal number.

partial: Enables partial match. A packet matches the rule if the specified option in the packet contains the ASCII string or hexadecimal number specified in the rule. For example, if you specify abc in the rule, option content xabc, xyzabca, xabcyz, and abcxyz all match the rule.

hex hex-string: Specifies a hexadecimal number. The length of the hexadecimal number must be an even number in the range of 2 to 256.

mask mask: Specifies the mask for the match operation. The mask is a hexadecimal number whose length is an even number in the range of 2 to 256 and must be the same as the hex-string length. The DHCPv6 server selects option content of the mask length from the start and ANDs the selected option content and the specified hexadecimal number with the mask. The packet matches the rule if the two AND operation results are the same.

length length: Specifies the length of the option content to be matched, in the range of 1 to 128 bytes. The length must be the same as the hex-string length.

relay-agent gateway-ipv6-address: Specifies a link-address field value. The value is an IPv6 address. A packet matches the rule if its link-address field value is the same as that in the rule.

Usage guidelines

If a DHCPv6 request sent by a DHCPv6 client matches a rule in a DHCPv6 user class, the DHCPv6 client matches the user class.

You can configure multiple match rules for a DHCPv6 user class. Each match rule is uniquely identified by a rule ID within its type (option or relay agent address).

· If the rule that you are configuring has the same ID and type as an existing rule, the new rule overwrites the existing rule.

· If the rule that you are configuring has the same ID as an existing rule but a different type, the new rule takes effect and coexists with the existing rule. As a best practice, do not assign the same ID to rules of different types.

· Rules of different IDs cannot have the same rule content.

When you configure an if-match option rule, follow these guidelines:

· To match packets that contain an option, specify only the option-code argument.

· To match a hexadecimal number by AND operations, specify the option option-code hex hex-string mask mask options.

· To match a hexadecimal number directly, specify the option option-code hex hex-string [ offset offset length length | partial ] options. If you do not specify the offset, length, or partial parameter, a packet matches a rule if the option content starts with the hexadecimal number.

· To match an ASCII string, specify the option option-code ascii ascii-string [ offset offset | partial ] options. If you do not specify the offset or partial parameter, a packet matches a rule if the option content starts with the ASCII string.

Examples

# Configure match rule 1 for the DHCPv6 user class exam to match DHCPv6 requests that contain Option 16.

<Sysname> system-view

[Sysname] ipv6 dhcp class exam

[Sysname-dhcp6-class-exam] if-match rule 1 option 16

# Configure match rule 2 for the DHCPv6 user class exam. The rule matches DHCPv6 requests in which the highest bit of the fourth byte in Option 16 is the hexadecimal number 1.

<Sysname> system-view

[Sysname] ipv6 dhcp class exam

[Sysname-dhcp6-class-exam] if-match rule 2 option 16 hex 00000080 mask 00000080

# Configure match rule 3 for the DHCPv6 user class exam. The rule matches DHCPv6 requests in which the first three bytes of Option 16 are the hexadecimal number 13ae92.

<Sysname> system-view

[Sysname] ipv6 dhcp class exam

[Sysname-dhcp6-class-exam] if-match rule 3 option 16 hex 13ae92 offset 0 length 3

# Configure match rule 4 for the DHCPv6 user class exam. The rule matches DHCPv6 requests in which the Option 16 contains the hexadecimal number 13ae.

<Sysname> system-view

[Sysname] ipv6 dhcp class exam

[Sysname-dhcp6-class-exam] if-match rule 5 option 16 hex 13ae partial

# Configure match rule 5 for the DHCPv6 user class exam to match DHCPv6 requests in which the link-address field is 2001::1.

<Sysname> system-view

[Sysname] ipv6 dhcp class exam

[Sysname-dhcp6-class-exam] if-match rule 5 relay-agent 2001::1

Related commands

ipv6 dhcp class

ipv6 dhcp apply-policy

Use ipv6 dhcp apply-policy to apply a DHCPv6 policy to an interface.

Use undo ipv6 dhcp apply-policy to restore the default.

Syntax

ipv6 dhcp apply-policy policy-name

undo ipv6 dhcp apply-policy

Default

No DHCPv6 policy is applied to an interface.

Views

Interface view

Predefined user roles

network-admin

context-admin

Parameters

policy-name: Specifies a DHCPv6 policy by its name, a case-insensitive string of 1 to 63 characters.

Usage guidelines

You can apply only one DHCPv6 policy to an interface. If you execute this command multiple times, the most recent configuration takes effect.

Examples

# Apply the DHCPv6 policy test to GigabitEthernet 1/0/1.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] ipv6 dhcp apply-policy test

Related commands

ipv6 dhcp class

Use ipv6 dhcp class to create a DHCPv6 user class and enter its view, or enter the view of an existing DHCPv6 user class.

Use undo ipv6 dhcp class to delete the specified DHCPv6 user class.

Syntax

ipv6 dhcp class class-name

undo ipv6 dhcp class class-name

Default

No DHCPv6 user classes exist.

Views

System view

Predefined user roles

network-admin

context-admin

Parameters

class-name: Specifies a name for the DHCPv6 user class, a case-insensitive string of 1 to 63 characters.

Usage guidelines

In the DHCPv6 user class view, you can use the if-match command to configure match rules for user classification.

Examples

# Create a DHCPv6 user class test and enter DHCPv6 user class view.

<Sysname> system-view

[Sysname] ipv6 dhcp class test

[Sysname-dhcp6-class-test]

Related commands

class pool

ipv6 dhcp policy

if-match

ipv6 dhcp option-group

Use ipv6 dhcp option-group to create a static DHCPv6 option group and enter its view.

Use undo ipv6 dhcp option-group to delete the specified static DHCPv6 option group.

Syntax

ipv6 dhcp option-group option-group-number

undo ipv6 dhcp option-group option-group-number

Default

No static DHCPv6 option groups exist.

Views

System view

Predefined user roles

network-admin

context-admin

Parameters

option-group-number: Assigns an ID to the static option group, in the range of 1 to 100.

Usage guidelines

A static DHCPv6 option group can use the same ID as a dynamic DHCPv6 option group. If a static DHCPv6 option group and a dynamic DHCPv6 option group use the same ID, the static one takes precedence over the dynamic one.

Examples

# Create static DHCPv6 option group 1 and enter its view.

<Sysname> system-view

[Sysname] ipv6 dhcp option-group 1

[Sysname-dhcp6-option-group-1]

Related commands

display ipv6 dhcp option-group

ipv6 dhcp policy

Use ipv6 dhcp policy to create a DHCPv6 policy and enter its view, or enter the view of an existing DHCPv6 policy.

Use undo ipv6 dhcp policy to delete a DHCPv6 policy.

Syntax

ipv6 dhcp policy policy-name

undo ipv6 dhcp policy policy-name

Default

No DHCPv6 policies exist.

Views

System view

Predefined user roles

network-admin

context-admin

Parameters

policy-name: Assigns a name to the DHCPv6 policy. The policy name is a case-insensitive string of 1 to 63 characters.

Usage guidelines

In DHCP policy view, you can specify address pools for different user classes. Clients matching a user class will obtain IPv6 addresses and other parameters from the specified address pool.

For a DHCPv6 policy to take effect, you must apply it to an interface.

Examples

# Create DHCPv6 policy test and enter its view.

<Sysname> system-view

[Sysname] ipv6 dhcp policy test

[Sysname-dhcp6-policy-test]

Related commands

class pool

default pool

ipv6 dhcp apply-policy

ipv6 dhcp class

ipv6 dhcp pool

Use ipv6 dhcp pool to create a DHCPv6 address pool and enter its view, or enter the view of an existing DHCPv6 address pool.

Use undo ipv6 dhcp pool to delete the specified DHCPv6 address pool.

Syntax

ipv6 dhcp pool pool-name

undo ipv6 dhcp pool pool-name

Default

No DHCPv6 address pools exist.

Views

System view

Predefined user roles

network-admin

context-admin

Parameters

pool-name: Specifies a name for the DHCPv6 address pool, a case-insensitive string of 1 to 63 characters.

Usage guidelines

A DHCPv6 address pool stores IPv6 address/prefix and other configuration parameters to be assigned to DHCPv6 clients.

When you delete a DHCPv6 address pool, binding information for the assigned IPv6 addresses and prefixes in the address pool is also deleted.

Examples

# Create a DHCPv6 address pool named pool1 and enter its view.

<Sysname> system-view

[Sysname] ipv6 dhcp pool pool1

[Sysname-dhcp6-pool-pool1]

Related commands

class pool

display ipv6 dhcp pool

ipv6 dhcp server apply pool

ipv6 dhcp prefix-pool

Use ipv6 dhcp prefix-pool to create a prefix pool and specify the prefix and the assigned prefix length for the pool.

Use undo ipv6 dhcp prefix-pool to delete the specified prefix pool.

Syntax

ipv6 dhcp prefix-pool prefix-pool-number prefix { prefix-number | prefix/prefix-len } assign-len assign-len [ vpn-instance vpn-instance-name ]

undo ipv6 dhcp prefix-pool prefix-pool-number [ vpn-instance vpn-instance-name ]

Default

No prefix pools exist.

Views

System view

Predefined user roles

network-admin

context-admin

Parameters

prefix-pool-number: Specifies a prefix pool number in the range of 1 to 128.

prefix { prefix-number | prefix/prefix-len }: Specifies a prefix by its ID or in the format of prefix/prefix length. The value range for the prefix-number argument is 1 to 1024. The value range for the prefix-len argument is 1 to 128.

assign-len assign-len: Specifies the assigned prefix length. The value range is 1 to 128, and the value must be greater than or equal to prefix-len. The difference between assign-len and prefix-len must be no more than 16.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. To create a prefix pool for the public network, do not specify this option.

Usage guidelines

Different prefix pools cannot overlap.

To modify a prefix pool, execute the undo ipv6 dhcp prefix-pool command to delete the prefix pool, and then execute the ipv6 dhcp prefix-pool command.

Deleting a prefix pool clears all prefix bindings from the prefix pool.

When you specify a prefix by its ID, follow these restrictions and guidelines:

· This command does not take effect if the prefix does not exist. This command takes effect after the prefix is created.

· Do not specify the same prefix for different prefix pools in a VPN.

· If the prefix that the ID represents is changed, the prefix range in the prefix pool accordingly changes.

Examples

# Create IPv6 prefix 88:99::/32 with ID 3. Configure prefix pool 2 with IPv6 prefix 3 and an assigned prefix length of 42. Prefix pool 2 contains 1024 prefixes from 88:99::/42 to 88:99:FFC0::/42.

<Sysname> system-view

[Sysname] ipv6 prefix 3 88:99::/32

[Sysname] ipv6 dhcp prefix-pool 2 prefix 3 assign-len 42

# Create prefix pool 1, and specify prefix 2001:0410::/32 with an assigned prefix length of 42. Prefix pool 1 contains 1024 prefixes from 2001:0410::/42 to 2001:0410:FFC0::/42.

<Sysname> system-view

[Sysname] ipv6 dhcp prefix-pool 1 prefix 2001:0410::/32 assign-len 42

Related commands

display ipv6 dhcp prefix-pool

prefix-pool

ipv6 dhcp server

Use ipv6 dhcp server to configure global address assignment on an interface. The server on the interface uses a global address pool to assign configuration information to a client.

Use undo ipv6 dhcp server to restore the default.

Syntax

ipv6 dhcp server { allow-hint | preference preference-value | rapid-commit } *

undo ipv6 dhcp server

Default

The server does not support desired address/prefix assignment or rapid address/prefix assignment. The server preference is not set.

Views

Interface view

Predefined user roles

network-admin

context-admin

Parameters

allow-hint: Enables desired address/prefix assignment.

preference preference-value: Specifies the server preference in Advertise messages, in the range of 0 to 255. A greater value represents a higher preference.

rapid-commit: Enables rapid address/prefix assignment involving two messages.

Usage guidelines

The allow-hint keyword enables the server to assign the desired address or prefix to the requesting client. If the desired address or prefix is not included in any global address pool, or is already assigned to another client, the server assigns the client a free address or a prefix. If the allow-hint keyword is not specified, the server ignores the desired address or prefix, and selects an address or prefix from a global address pool.

If you use the ipv6 dhcp server and ipv6 dhcp server apply pool commands on the same interface, the ipv6 dhcp server apply pool command takes effect.

Examples

# Configure global address assignment on the interface GigabitEthernet 1/0/1. Use the desired address/prefix assignment and rapid address/prefix assignment, and set the server preference to the highest 255.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] ipv6 dhcp server allow-hint preference 255 rapid-commit

Related commands

display ipv6 dhcp server

ipv6 dhcp select

ipv6 dhcp server apply pool

Use ipv6 dhcp server apply pool to apply a DHCPv6 address pool to an interface.

Use undo ipv6 dhcp server apply pool to restore the default.

Syntax

ipv6 dhcp server apply pool pool-name [ allow-hint | preference preference-value | rapid-commit ] *

undo ipv6 dhcp server apply pool

Default

No DHCPv6 address pool is applied to an interface.

Views

Interface view

Predefined user roles

network-admin

context-admin

Parameters

pool-name: Specifies a DHCPv6 address pool by its name, a case-insensitive string of 1 to 63 characters.

allow-hint: Enables desired address/prefix assignment.

preference preference-value: Specifies the server preference in Advertise messages, in the range of 0 to 255. A greater value represents a higher preference. By default, the server preference is not set.

rapid-commit: Enables rapid address/prefix assignment involving two messages.

Usage guidelines

Upon receiving a DHCPv6 request, the DHCPv6 server selects an IPv6 address or prefix from the address pool applied to the receiving interface. If no address pool is applied, the server selects an IPv6 address or prefix from a global address pool that matches the IPv6 address of the receiving interface or the DHCPv6 relay agent.

The allow-hint keyword enables the server to assign the desired address or prefix to the client. If the desired address or prefix does not exist or is already assigned to another client, the server assigns a free address or prefix. If allow-hint is not specified, the server ignores the desired address or prefix, and assigns a free address or prefix.

Only one address pool can be applied to an interface. If you execute this command multiple times, the most recent configuration takes effect.

A non-existing address pool can be applied to an interface, but the server cannot assign any prefix, address, or other configuration information from the address pool until the address pool is created.

Examples

# Apply address pool 1 to GigabitEthernet 1/0/1, configure the address pool to support desired address/prefix assignment and address/prefix rapid assignment, and set the preference to 255.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] ipv6 dhcp server apply pool 1 allow-hint preference 255 rapid-commit

Related commands

display ipv6 dhcp server

ipv6 dhcp pool

ipv6 dhcp select

ipv6 dhcp server database filename

Use ipv6 dhcp server database filename to configure the DHCPv6 server to back up the DHCPv6 bindings to a file.

Use undo ipv6 dhcp server database filename to restore the default.

Syntax

ipv6 dhcp server database filename { filename | url url [ username username [ password { cipher | simple } string ] ] }

undo ipv6 dhcp server database filename

Default

The DHCPv6 server does not back up the DHCPv6 bindings.

Views

System view

Predefined user roles

network-admin

context-admin

Parameters

filename: Specifies the name of a local backup file. For information about the filename argument, see Fundamentals Configuration Guide.

url url: Specifies the URL of a remote backup file. The URL is a case-sensitive string of 1 to 255 characters. Do not include a username or password in the URL.

username username: Specifies the username for accessing the URL of the remote backup file, a case-sensitive string of 1 to 32 characters. Do not specify this option if a username is not required for accessing the URL of the remote backup file.

cipher: Specifies a password in encrypted form.

simple: Specifies a password in plaintext form. For security purposes, the password specified in plaintext form will be stored in encrypted form.

string: Specifies the password. Its plaintext form is a case-sensitive string of 1 to 32 characters. Its encrypted form is a case-sensitive string of 1 to 73 characters. Do not specify this argument if a password is not required for accessing the URL of the remote backup file.

Usage guidelines

The command automatically creates the file if you specify a nonexistent file.

With this command executed, the DHCPv6 server backs up its bindings immediately and runs auto backup. The server, by default, waits 300 seconds after a binding change to update the backup file. You can use the ipv6 dhcp server database update interval command to change the waiting time. If no DHCPv6 binding changes, the backup file is not updated.

As a best practice, back up the bindings to a remote file. If you use the local storage medium, the frequent erasing and writing might damage the medium and then cause the DHCPv6 server to malfunction.

When the backup file is on a remote device, follow these restrictions and guidelines to specify the URL, username, and password:

· If the file is on an FTP server, enter URL in the format of ftp://server address:port/file path, where the port number is optional.

· If the file is on a TFTP server, enter URL in the format of tftp://server address:port/file path, where the port number is optional.

· The username and password must be the same as those configured on the FTP server. If the server authenticates only the username, the password can be omitted.

· If the IP address of the server is an IPv6 address, enclose the address in a pair of brackets, for example, ftp://[1::1]/database.dhcp.

· You can also specify the DNS domain name for the server address field, for example, ftp://company/database.dhcp.

Examples

# Configure the DHCPv6 server to back up its bindings to the file database.dhcp

<Sysname> system-view

[Sysname] ipv6 dhcp server database filename database.dhcp

# Configure the DHCPv6 server to back up its bindings to the file database.dhcp in the working directory of the FTP server at 10::1.

<Sysname> system-view

[Sysname] ipv6 dhcp server database filename url ftp://[10::1]/database.dhcp username 1 password simple 1

Related commands

ipv6 dhcp server database update interval

ipv6 dhcp server database update now

ipv6 dhcp server database update stop

ipv6 dhcp server database update interval

Use ipv6 dhcp server database update interval to set the waiting time for the DHCPv6 server to update the backup file after a DHCPv6 binding change.

Use undo ipv6 dhcp server database update interval to restore the default.

Syntax

ipv6 dhcp server database update interval interval

undo ipv6 dhcp server database update interval

Default

The DHCPv6 server waits 300 seconds to update the backup file after a DHCPv6 binding change. If no DHCPv6 binding changes, the backup file is not updated.

Views

System view

Predefined user roles

network-admin

context-admin

Parameters

interval: Sets the waiting time in the range of 60 to 864000 seconds.

Usage guidelines

When a DHCPv6 binding is created, updated, or removed, the waiting period starts. The DHCPv6 server updates the backup file when the waiting period is reached. All bindings changed during the period will be saved to the backup file.

The waiting time takes effect only after you configure the DHCPv6 binding auto backup by using the ipv6 dhcp server database filename command.

Examples

# Set the waiting time to 600 seconds for the DHCPv6 server to update the backup file.

<Sysname> system-view

[Sysname] ipv6 dhcp server database update interval 600

Related commands

ipv6 dhcp server database filename

ipv6 dhcp server database update now

ipv6 dhcp server database update stop

ipv6 dhcp server database update now

Use ipv6 dhcp server database update now to manually save the DHCPv6 bindings to the backup file.

Syntax

ipv6 dhcp server database update now

Views

System view

Predefined user roles

network-admin

context-admin

Usage guidelines

Each time this command is executed, the DHCPv6 bindings are saved to the backup file.

For this command to take effect, you must configure the DHCPv6 auto backup by using the ipv6 dhcp server database filename command.

Examples

# Manually save the DHCPv6 bindings to the backup file.

<Sysname> system-view

[Sysname] ipv6 dhcp server database update now

Related commands

ipv6 dhcp server database filename

ipv6 dhcp server database update interval

ipv6 dhcp server database update stop

Use ipv6 dhcp server database update stop to terminate the download of DHCPv6 bindings from the backup file.

Syntax

ipv6 dhcp server database update stop

Views

System view

Predefined user roles

network-admin

context-admin

Usage guidelines

The DHCPv6 server does not provide services during the binding download process. If the connection breaks up during the process, the waiting timeout timer is 60 minutes. When the timer expires, the DHCPv6 server stops waiting and starts providing address allocation services. You can execute this command to terminate the download immediately.

Manual termination allows the DHCPv6 server to provide services without waiting for the connection to be repaired. The IPv6 addresses and prefixes associated with the undownloaded bindings will be assigned to clients and address conflicts might occur.

Examples

# Terminate the download of the backup DHCPv6 bindings.

<Sysname> system-view

[Sysname] ipv6 dhcp server database update stop

Related commands

ipv6 dhcp server database filename

ipv6 dhcp server database update interval

ipv6 dhcp server database update now

ipv6 dhcp server forbidden-address

Use ipv6 dhcp server forbidden-address to exclude IPv6 addresses in the DHCPv6 address pool from dynamic allocation.

Use undo ipv6 dhcp server forbidden-address to remove the configuration.

Syntax

ipv6 dhcp server forbidden-address start-ipv6-address [ end-ipv6-address ] [ vpn-instance vpn-instance-name ]

undo ipv6 dhcp server forbidden-address start-ipv6-address [ end-ipv6-address ] [ vpn-instance vpn-instance-name ]

Default

Except for the DHCPv6 server address, all IPv6 addresses in a DHCPv6 address pool are assignable.

Views

System view

Predefined user roles

network-admin

context-admin

Parameters

start-ipv6-address: Specifies the start IPv6 address.

end-ipv6-address: Specifies the end IPv6 address, which cannot be lower than start-ipv6-address. If you do not specify an end IPv6 address, only the start IPv6 address is excluded from dynamic allocation. If you specify an end IPv6 address, the IP addresses from start-ipv6-address through end-ipv6-address are all excluded from dynamic allocation.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If the excluded IPv6 addresses belong to the public network, do not specify this option.

Usage guidelines

The IPv6 addresses of some devices such as the gateway and FTP server cannot be assigned to clients. Use this command to exclude such addresses from dynamic allocation.

If the excluded IPv6 address is in a static DHCPv6 binding, the address can still be assigned to the client.

The address or address range specified in the undo form of the command must be the same as the address or address range specified in the command. To remove an IP address that has been specified as part of an address range, you must remove the entire address range.

You can execute this command multiple times to exclude multiple IPv6 address ranges from dynamic allocation.

Examples

# Exclude IPv6 addresses of 2001:10:110::1 through 2001:10:110::20 from dynamic assignment.

<Sysname> system-view

[Sysname] ipv6 dhcp server forbidden-address 2001:10:110::1 2001:10:110::20

Related commands

ipv6 dhcp server forbidden-prefix

static-bind

ipv6 dhcp server forbidden-prefix

Use ipv6 dhcp server forbidden-prefix to exclude IPv6 prefixes in the DHCPv6 prefix pool from dynamic allocation.

Use undo ipv6 dhcp server forbidden-prefix to remove the configuration.

Syntax

ipv6 dhcp server forbidden-prefix start-prefix/prefix-len [ end-prefix/prefix-len ] [ vpn-instance vpn-instance-name ]

undo ipv6 dhcp server forbidden-prefix start-prefix/prefix-len [ end-prefix/prefix-len ] [ vpn-instance vpn-instance-name ]

Default

No IPv6 prefixes in the DHCPv6 prefix pool are excluded from dynamic allocation.

Views

System view

Predefined user roles

network-admin

context-admin

Parameters

start-prefix/prefix-len: Specifies the start IPv6 prefix. The prefix-len argument specifies the prefix length in the range of 1 to 128.

end-prefix/prefix-len: Specifies the end IPv6 prefix. The prefix-len argument specifies the prefix length in the range of 1 to 128. The value for end-prefix cannot be lower than that for start-prefix. If you do not specify this argument, only the start-prefix/prefix-len is excluded from dynamic allocation. If you specify this argument, the prefixes from start-prefix/prefix-len to end-prefix/prefix-len are all excluded.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If the excluded IPv6 prefixes belong to the public network, do not specify this option.

Usage guidelines

If the excluded IPv6 prefix is in a static binding, the prefix can still be assigned to the client.

The prefix or prefix range specified in the undo form of the command must be the same as the prefix or prefix range specified in the command. To remove a prefix that has been specified as part of a prefix range, you must remove the entire prefix range.

You can execute this command multiple times to exclude multiple IPv6 prefix ranges from dynamic allocation.

Examples

# Exclude IPv6 prefixes from 2001:3e11::/32 through 2001:3eff::/32 from dynamic allocation.

<Sysname> system-view

[Sysname] ipv6 dhcp server forbidden-prefix 2001:3e11::/32 2001:3eff::/32

Related commands

ipv6 dhcp server forbidden-address

static-bind

network

Use network to specify an IPv6 subnet for dynamic allocation in a DHCPv6 address pool.

Use undo network to restore the default.

Syntax

network { prefix/prefix-length | prefix prefix-number [ sub-prefix/sub-prefix-length ] } [ preferred-lifetime preferred-lifetime valid-lifetime valid-lifetime ] [ export-route ]

undo network

Default

No IPv6 subnet is specified in a DHCPv6 address pool.

Views

DHCPv6 address pool view

Predefined user roles

network-admin

context-admin

Parameters

prefix/prefix-length: Specifies the IPv6 subnet for dynamic allocation. The value range for the prefix-length argument is 1 to 128.

prefix prefix-number: Specifies an IPv6 prefix by its ID in the range of 1 to 1024.

sub-prefix/sub-prefix-length: Specifies an IPv6 sub-prefix and its length. The value range for the sub-prefix-length argument is 1 to 128. If the IPv6 prefix is longer than the IPv6 sub-prefix or if you do not specify an IPv6 sub-prefix, the IPv6 subnet defined by the IPv6 prefix is used for dynamic allocation.

preferred-lifetime preferred-lifetime: Sets the preferred lifetime. The value range is 60 to 4294967295 seconds, and the default is 604800 seconds (7 days).

valid-lifetime valid-lifetime: Sets the valid lifetime. The value range is 60 to 4294967295 seconds, and the default is 2592000 seconds (30 days). The valid lifetime must be longer than or equal to the preferred lifetime.

export-route: Advertises the subnet assigned to DHCPv6 clients. If you do not specify this keyword, the subnet will not be advertised.

Usage guidelines

You can specify only one subnet for a DHCPv6 address pool. If you execute the network command multiple times, the most recent configuration takes effect.

Modifying or removing the network command configuration removes assigned addresses in the current address pool.

If you execute the network export-route command multiple times, the most recent configuration takes effect.

The network prefix command does not take effect if the specified IPv6 prefix does not exist. This command takes effect after the IPv6 prefix is created.

The network command defines the IPv6 subnet for dynamic allocation through the prefix/prefix-length arguments or the prefix-number [ sub-prefix/sub-prefix-length ] arguments. The IPv6 subnets cannot be the same in different DHCPv6 address pools.

If the prefix that the ID represents is changed, the IPv6 subnet in this command accordingly changes, and the assigned prefix and address bindings are cleared.

Examples

# Specify the subnet 3ffe:501:ffff:100::/64 in DHCPv6 address pool 1.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1] network 3ffe:501:ffff:100::/64

# Create IPv6 prefix 88:99::/32 with the prefix ID 3. Create DHCPv6 address pool 1 and use the IPv6 subnet defined by the IPv6 prefix for dynamic allocation.

<Sysname> system-view

[Sysname] ipv6 prefix 3 88:99::/32

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1] network prefix 3

# Create IPv6 prefix 88:99::/32 with the prefix ID 3. Create DHCPv6 address pool 1 and use IPv6 subnet 88:99:ffff:100::/64 defined by IPv6 prefix 3 and IPv6 sub-prefix 3ffe:501:ffff:100::/64 for dynamic allocation. The first 32 bits of the IPv6 subnet are determined by IPv6 prefix 3. The bits 33 to 64 of the IPv6 subnet are determined by the IPv6 sub-prefix and its length. The prefix length of the IPv6 subnet is the IPv6 sub-prefix length.

<Sysname> system-view

[Sysname] ipv6 prefix 3 88:99::/32

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1] network prefix 3 3ffe:501:ffff:100::/64

Related commands

address range

display ipv6 dhcp pool

temporary address range

option

Use option to configure a self-defined DHCPv6 option in a DHCPv6 address pool.

Use undo option to remove a self-defined DHCPv6 option from a DHCPv6 address pool.

Syntax

option code hex hex-string

undo option code

Default

No self-defined DHCPv6 option is configured in a DHCPv6 address pool.

Views

DHCPv6 address pool view

DHCPv6 option group view

Predefined user roles

network-admin

context-admin

Parameters

code: Specifies a number for the self-defined option, in the range of 21 to 65535, excluding 25 through 26, 37 through 40, and 43 through 48.

hex hex-string: Specifies the content of the option, a hexadecimal number whose length is an even number in the range of 2 to 256.

Usage guidelines

The DHCPv6 server fills the self-defined option with the specified hexadecimal number and sends it in a response to the client.

You can self-define options for the following purposes:

· Add newly released options.

· Add options for which the vendor defines the contents, for example, Option 43.

· Add options for which the CLI does not provide a dedicated configuration command like dns-server. For example, you can use the option 31 hex 02000000000000000000000000000001 command to define the NTP server address 200::1 for DHCP clients.

If a DHCPv6 option is specified by both the dedicated command and the option command, the DHCPv6 server preferentially assigns the content specified by the dedicated command. For example, if a DNS server address is specified by the dns-server command and the option 23 command, the server uses the address specified by dns-server command.

If you execute this command multiple times with the same code specified, the most recent configuration takes effect.

Examples

# Configure Option 23 that specifies a DNS server address 2001:f3e0::1 in DHCPv6 address pool 1.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1] option 23 hex 2001f3e0000000000000000000000001

Related commands

display ipv6 dhcp pool

dns-server

domain-name

sip-server

option-group

Use option-group to specify a DHCPv6 option group for a DHCPv6 address pool.

Use undo option-group to restore the default.

Syntax

option-group option-group-number

undo option-group

Default

No DHCPv6 option group is specified for a DHCPv6 address pool.

Views

DHCPv6 address pool view

Predefined user roles

network-admin

context-admin

Parameters

option-group--number: Specifies a DHCPv6 option group by its number in the range of 1 to 100.

Examples

# Specify DHCPv6 option group 1 for DHCPv6 address pool 1.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1] option-group 1

Related commands

display ipv6 dhcp pool

ipv6 dhcp option-group

prefix-pool

Use prefix-pool to apply a prefix pool to a DHCPv6 address pool, so the DHCPv6 server can dynamically select a prefix from the prefix pool for a client.

Use undo prefix-pool to remove the prefix pool.

Syntax

prefix-pool prefix-pool-number [ preferred-lifetime preferred-lifetime valid-lifetime valid-lifetime ]

undo prefix-pool prefix-pool-number

Default

No prefix pool is applied to a DHCPv6 address pool.

Views

DHCPv6 address pool view

Predefined user roles

network-admin

context-admin

Parameters

prefix-pool-number: Specifies a prefix pool by its number in the range of 1 to 128.

preferred-lifetime preferred-lifetime: Sets the preferred lifetime in the range of 60 to 4294967295 seconds. The default value is 604800 seconds (7 days).

valid-lifetime valid-lifetime: Sets the valid lifetime in the range of 60 to 4294967295 seconds. The default value is 2592000 seconds (30 days). The valid lifetime must be longer than or equal to the preferred lifetime.

Usage guidelines

Only one prefix pool can be applied to an address pool.

You can apply a prefix pool that has not been created to an address pool. The setting takes effect after the prefix pool is created.

To modify the prefix pool in a DHCPv6 address pool, execute the undo prefix-pool command to remove the prefix pool, and then execute the prefix-pool command.

Examples

# Apply prefix pool 1 to address pool 1, and use the default preferred lifetime and valid lifetime.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1] prefix-pool 1

# Apply prefix pool 2 to address pool 2, and set the preferred lifetime to one day and the valid lifetime to three days.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 2

[Sysname-dhcp6-pool-2] prefix-pool 2 preferred-lifetime 86400 valid-lifetime 259200

Related commands

display ipv6 dhcp pool

ipv6 dhcp prefix-pool

reset ipv6 dhcp server conflict

Use reset ipv6 dhcp server conflict to clear IPv6 address conflict information.

Syntax

reset ipv6 dhcp server conflict [ address ipv6-address ] [ vpn-instance vpn-instance-name ]

Views

User view

Predefined user roles

network-admin

context-admin

Parameters

address ipv6-address: Clears conflict information for the specified IPv6 address. If you do not specify an IPv6 address, this command clears all IPv6 address conflict information.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If you do not specify a VPN instance, this command clears conflict information about IPv6 addresses for the public network.

Usage guidelines

Address conflicts occur when dynamically assigned IP addresses have been statically configured for other hosts. After the conflicts are resolved, you can use the reset ipv6 dhcp server conflict command to clear conflict information so that the conflicted addresses can be assigned to clients.

Examples

# Clear all IPv6 address conflict information.

<Sysname> reset ipv6 dhcp server conflict

Related commands

display ipv6 dhcp server conflict

reset ipv6 dhcp server expired

Use reset ipv6 dhcp server expired to clear binding information for lease-expired IPv6 addresses.

Syntax

reset ipv6 dhcp server expired [ [ address ipv6-address ] [ vpn-instance vpn-instance-name ] | pool pool-name ]

Views

User view

Predefined user roles

network-admin

context-admin

Parameters

address ipv6-address: Clears binding information for the specified lease-expired IPv6 address. If you do not specify an IPv6 address, this command clears binding information for all lease-expired IPv6 address.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If you do not specify a VPN instance, this command clears binding information about lease-expired IPv6 addresses for the public network.

pool pool-name: Clears binding information for lease-expired IPv6 addresses in the address pool specified by its name, a case-insensitive string of 1 to 63 characters. If you do not specify an address pool, this command clears binding information for lease-expired IPv6 addresses in all address pools.

Examples

# Clear binding information for expired IPv6 address 2001:f3e0::1.

<Sysname> reset ipv6 dhcp server expired address 2001:f3e0::1

Related commands

display ipv6 dhcp server expired

reset ipv6 dhcp server ip-in-use

Use reset ipv6 dhcp server ip-in-use to clear binding information for assigned IPv6 addresses.

Syntax

reset ipv6 dhcp server ip-in-use [ [ address ipv6-address ] [ vpn-instance vpn-instance-name ] | pool pool-name ]

Views

User view

Predefined user roles

network-admin

context-admin

Parameters

address ipv6-address: Clears binding information for the specified assigned IPv6 address. If you do not specify an IPv6 address, this command clears binding information for all assigned IPv6 addresses.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If you do not specify a VPN instance, this command clears binding information about assigned IPv6 addresses for the public network.

pool pool-name: Clears binding information for assigned IPv6 addresses in the address pool specified by its name, a case-insensitive string of 1 to 63 characters. If you do not specify an address pool, this command clears binding information for assigned IPv6 addresses in all address pools.

Usage guidelines

If you execute this command to clear information about an assigned static binding, the static binding becomes a free static binding.

Examples

# Clear binding information for all assigned IPv6 addresses.

<Sysname> reset ipv6 dhcp server ip-in-use

# Clears binding information for assigned IPv6 addresses in DHCPv6 address pool 1.

<Sysname> reset ipv6 dhcp server ip-in-use pool 1

# Clears binding information for the assigned IPv6 address 2001:0:0:1::1.

<Sysname> reset ipv6 dhcp server ip-in-use address 2001:0:0:1::1

Related commands

display ipv6 dhcp server ip-in-use

reset ipv6 dhcp server pd-in-use

Use reset ipv6 dhcp server pd-in-use to clear binding information for assigned IPv6 prefixes.

Syntax

reset ipv6 dhcp server pd-in-use [ pool pool-name | [ prefix prefix/prefix-len ] [ vpn-instance vpn-instance-name ] ]

Views

User view

Predefined user roles

network-admin

context-admin

Parameters

pool pool-name: Clears binding information for assigned IPv6 prefixes in the address pool specified by its name, a case-insensitive string of 1 to 63 characters. If you do not specify an address pool, this command clears binding information for assigned IPv6 prefixes in all address pools.

prefix prefix/prefix-len: Clears binding information for the specified assigned IPv6 prefix. The value range for the prefix length is 1 to 128. If you do not specify an IPv6 prefix, this command clears binding information for all assigned IPv6 prefixes.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If you do not specify a VPN instance, this command clears binding information about assigned IPv6 prefixes for the public network.

Usage guidelines

If you execute this command to clear information about an assigned static binding, the static binding becomes a free static binding.

Examples

# Clear binding information for all assigned IPv6 prefixes.

<Sysname> reset ipv6 dhcp server pd-in-use

# Clears binding information for assigned IPv6 prefixes in DHCPv6 address pool 1.

<Sysname> reset ipv6 dhcp server pd-in-use pool 1

# Clears binding information for the assigned IPv6 prefix 2001:0:0:1::/64.

<Sysname> reset ipv6 dhcp server pd-in-use prefix 2001:0:0:1::/64

Related commands

display ipv6 dhcp server pd-in-use

reset ipv6 dhcp server statistics

Use reset ipv6 dhcp server statistics to clear DHCPv6 server statistics.

Syntax

reset ipv6 dhcp server statistics [ vpn-instance vpn-instance-name ]

Views

User view

Predefined user roles

network-admin

context-admin

Parameters

Examples

# Clear DHCPv6 server statistics.

<Sysname> reset ipv6 dhcp server statistics

Related commands

display ipv6 dhcp server statistics

sip-server

Use sip-server to specify the IPv6 address or domain name of a SIP server in the DHCPv6 address pool.

Use undo sip-server to remove a SIP server.

Syntax

sip-server { address ipv6-address | domain-name domain-name }

undo sip-server { address ipv6-address | domain-name domain-name }

Default

No SIP server address or domain name is specified.

Views

DHCPv6 address pool view

DHCPv6 option group view

Predefined user roles

network-admin

context-admin

Parameters

address ipv6-address: Specifies the IPv6 address of a SIP server.

domain-name domain-name: Specifies the domain name of a SIP server, a case-insensitive string of 1 to 50 characters.

Usage guidelines

You can specify up to eight SIP server addresses and eight SIP server domain names in an address pool. A SIP server that is specified earlier has a higher preference.

Examples

# Specify the SIP server address 2:2::4 in DHCPv6 address pool 1.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1] sip-server address 2:2::4

# Specify the SIP server domain name bbb.com in DHCPv6 address pool 1.

[Sysname-dhcp6-pool-1] sip-server domain-name bbb.com

Related commands

display ipv6 dhcp pool

static-bind

Use static-bind to statically bind an IPv6 address or prefix to a client in the DHCPv6 address pool.

Use undo static-bind to delete a static binding.

Syntax

static-bind { address ipv6-address/addr-prefix-length | prefix prefix/prefix-len } duid duid [ iaid iaid ] [ preferred-lifetime preferred-lifetime valid-lifetime valid-lifetime ] [ description description-text ]

undo static-bind { address ipv6-address/addr-prefix-length | prefix prefix/prefix-len }

Default

No static binding is configured in a DHCPv6 address pool.

Views

DHCPv6 address pool view

Predefined user roles

network-admin

context-admin

Parameters

address ipv6-address/addr-prefix-length: Specifies the IPv6 address and prefix length. The value range for the prefix length is 1 to 128.

prefix prefix/prefix-len: Specifies the prefix and prefix length. The value range for the prefix length is 1 to 128.

duid duid: Specifies a client DUID. The value is an even hexadecimal number in the range of 2 to 256.

iaid iaid: Specifies a client IAID. The value is a hexadecimal number in the range of 0 to FFFFFFFF. If you do not specify an IAID, the server does not match the client IAID for prefix assignment.

preferred-lifetime preferred-lifetime: Sets the preferred lifetime of the address or prefix. The value range is 60 to 4294967295 seconds, and the default is 604800 seconds (7 days).

valid-lifetime valid-lifetime: Sets the valid lifetime of the address or prefix. The value range is 60 to 4294967295 seconds, and the default is 2592000 seconds (30 days). The valid lifetime cannot be shorter than the preferred lifetime.

description description-text: Specifies a description for the static binding, a case-sensitive string of 1 to 255 characters.

Usage guidelines

You can specify multiple static bindings in a DHCPv6 address pool.

An IPv6 address or prefix can be bound to only one DHCPv6 client.

To modify a static binding, execute the undo static-bind command to delete the binding, and then execute the static-bind command.

Examples

# In address pool 1, bind IPv6 address 2001:0410::/35 to the client DUID 0003000100e0fc005552 and IAID A1A1A1A1.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1] static-bind address 2001:0410::/35 duid 0003000100e0fc005552 iaid A1A1A1A1

# In address pool 1, bind prefix 2001:0410::/35 to the client DUID 00030001CA0006A400 and IAID A1A1A1A1.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1] static-bind prefix 2001:0410::/35 duid 00030001CA0006A400 iaid A1A1A1A1

Related commands

display ipv6 dhcp pool

temporary address range

Use temporary address range to configure a temporary IPv6 address range in a DHCPv6 address pool for dynamic allocation.

Use undo temporary address range to restore the default.

Syntax

temporary address range start-ipv6-address end-ipv6-address [ preferred-lifetime preferred-lifetime valid-lifetime valid-lifetime ]

undo temporary address range

Default

No temporary IPv6 address range is configured in a DHCPv6 address pool.

Views

DHCPv6 address pool view

Predefined user roles

network-admin

context-admin

Parameters

start-ipv6-address: Specifies the start IPv6 address.

end-ipv6-address: Specifies the end IPv6 address.

preferred-lifetime preferred-lifetime: Sets the preferred lifetime. The value range is 60 to 4294967295 seconds, and the default is 604800 seconds (7 days).

valid-lifetime valid-lifetime: Sets the valid lifetime. The value range is 60 to 4294967295 seconds, and the default is 2592000 seconds (30 days). The valid lifetime cannot be shorter than the preferred lifetime.

Usage guidelines

If you do not execute the temporary address range command, the DHCPv6 server does not support temporary address assignment.

You can configure only one temporary IPv6 address range in an address pool. If you execute this command multiple times, the most recent configuration takes effect.

Examples

# In DHCPv6 address pool 1, configure a temporary IPv6 address range from 3ffe:501:ffff:100::50 to 3ffe:501:ffff:100::60.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 1

[Sysname-dhcp6-pool-1] network 3ffe:501:ffff:100::/64

[Sysname-dhcp6-pool-1] temporary address range 3ffe:501:ffff:100::50 3ffe:501:ffff:100::60

Related commands

display ipv6 dhcp pool

address range

network

vpn-instance

Use vpn-instance to apply a DHCPv6 address pool to a VPN instance.

Use undo vpn-instance to restore the default.

Syntax

vpn-instance vpn-instance-name

undo vpn-instance

Default

The DHCPv6 address pool is not applied to any VPN instance.

Views

DHCPv6 address pool view

Predefined user roles

network-admin

context-admin

Parameters

vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If you do not specify a VPN instance, the DHCPv6 address pool belongs to the public network.

Usage guidelines

If a DHCPv6 address pool is applied to a VPN instance, the DHCPv6 server assigns IPv6 addresses in this address pool to clients in the specified VPN instance.

The DHCPv6 server identifies the VPN instance to which a DHCPv6 client belongs according to the following information:

· The client's VPN information stored in authentication modules.

· The VPN information of the DHCPv6 server's interface that receives DHCPv6 packets from the client.

The VPN information from authentication modules takes priority over the VPN information of the receiving interface.

Examples

# Apply DHCPv6 address pool 0 to the VPN instance abc.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 0

[Sysname-dhcp6-pool-0] vpn-instance abc

DHCPv6 relay agent commands

display ipv6 dhcp relay server-address

Use display ipv6 dhcp relay server-address to display DHCPv6 server addresses specified on the DHCPv6 relay agent.

Syntax

display ipv6 dhcp relay server-address [ interface interface-type interface-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

context-admin

context-operator

Parameters

interface interface-type interface-number: Specifies an interface by its type and number. If you do not specify an interface, this command displays DHCPv6 server addresses on all interfaces enabled with DHCPv6 relay agent.

Examples

# Display DHCPv6 server addresses on all interfaces enabled with DHCPv6 relay agent.

<Sysname> display ipv6 dhcp relay server-address

Interface: GigabitEthernet1/0/1

Server address Outgoing Interface

2::3

3::4 GigabitEthernet1/0/3

Interface: GigabitEthernet1/0/2

Server address Outgoing Interface

2::3

3::4 GigabitEthernet1/0/3

# Display DHCPv6 server addresses on GigabitEthernet 1/0/1.

<Sysname> display ipv6 dhcp relay server-address interface gigabitethernet 1/0/1

Interface: GigabitEthernet1/0/1

Server address Outgoing Interface

2::3

3::4 GigabitEthernet1/0/3

Table 11 Command output

Field	Description
Server address	DHCPv6 server address specified on the DHCP relay agent.
Outgoing Interface	Output interface of DHCPv6 packets. If no output interface is specified, the device searches the routing table for the output interface.

Related commands

ipv6 dhcp relay server-address

ipv6 dhcp select

display ipv6 dhcp relay statistics

Use display ipv6 dhcp relay statistics to display DHCPv6 packet statistics on the DHCPv6 relay agent.

Syntax

display ipv6 dhcp relay statistics [ interface interface-type interface-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

context-admin

context-operator

Parameters

interface interface-type interface-number: Specifies an interface by its type and number. If you do not specify an interface, this command displays DHCPv6 packets statistics on all interfaces enabled with DHCPv6 relay agent.

Examples

# Display DHCPv6 packet statistics on all interfaces enabled with DHCPv6 relay agent.

<Sysname> display ipv6 dhcp relay statistics

Packets dropped : 4

Packets received : 14

Solicit : 0

Request : 0

Confirm : 0

Renew : 0

Rebind : 0

Release : 0

Decline : 0

Information-request : 7

Relay-forward : 0

Relay-reply : 7

Packets sent : 14

Advertise : 0

Reconfigure : 0

Reply : 7

Relay-forward : 7

Relay-reply : 0

# Display DHCPv6 packet statistics on the DHCPv6 relay agent on GigabitEthernet 1/0/1.

<Sysname> display ipv6 dhcp relay statistics interface gigabitethernet 1/0/1

Packets dropped : 4

Packets received : 16

Solicit : 0

Request : 0

Confirm : 0

Renew : 0

Rebind : 0

Release : 0

Decline : 0

Information-request : 8

Relay-forward : 0

Relay-reply : 8

Packets sent : 16

Advertise : 0

Reconfigure : 0

Reply : 8

Relay-forward : 8

Relay-reply : 0

Table 12 Command output

Field	Description
Packets dropped	Number of discarded packets.
Packets received	Number of received packets.
Solicit	Number of received solicit packets.
Request	Number of received request packets.
Confirm	Number of received confirm packets.
Renew	Number of received renew packets.
Rebind	Number of received rebind packets.
Release	Number of received release packets.
Decline	Number of received decline packets.
Information-request	Number of received information request packets.
Relay-forward	Number of received relay-forward packets.
Relay-reply	Number of received relay-reply packets.
Packets sent	Number of sent packets.
Advertise	Number of sent advertise packets.
Reconfigure	Number of sent reconfigure packets.
Reply	Number of sent reply packets.
Relay-forward	Number of sent Relay-forward packets.
Relay-reply	Number of sent Relay-reply packets.

Related commands

reset ipv6 dhcp relay statistics

gateway-list

Use gateway-list to specify gateway addresses for DHCPv6 clients in a DHCPv6 address pool.

Use undo gateway-list to remove gateway addresses from a DHCPv6 address pool.

Syntax

gateway-list ipv6-address&<1-8>

undo gateway-list [ ipv6-address&<1-8> ]

Default

No gateway address is specified in a DHCPv6 address pool.

Views

DHCPv6 address pool view

Predefined user roles

network-admin

context-admin

Parameters

ipv6-address&<1-8>: Specifies a space-separated list of up to eight addresses.

Usage guidelines

DHCPv6 clients of the same access type can be classified into different types by their locations. In this case, the relay interface typically has no IPv6 address configured. You can use the gateway-list command to specify gateway addresses for clients matching the same DHCPv6 address pool.

Upon receiving a DHCPv6 Solicit or Request from a client that matches a DHCPv6 address pool, the relay agent processes the packet as follows:

· Fills the link-address field of the packet with a specified gateway address.

· Forwards the packet to all DHCPv6 servers in the matching DHCPv6 address pool.

The DHCPv6 servers select a DHCPv6 address pool according to the gateway address.

Examples

# Specify the gateway address 10::1 in the DHCPv6 address pool p1.

<Sysname> system-view

[Sysname] ipv6 dhcp pool p1

[Sysname-dhcp6-pool-p1] gateway-list 10::1

ipv6 dhcp relay gateway

Use ipv6 dhcp relay gateway to specify a gateway address for DHCPv6 clients on the DHCPv6 relay interface.

Use undo ipv6 dhcp relay gateway to restore the default.

Syntax

ipv6 dhcp relay gateway ipv6-address

undo ipv6 dhcp relay gateway

Default

The first IPv6 address of the relay interface is used as the gateway address for DHCPv6 clients.

Views

Interface view

Predefined user roles

network-admin

context-admin

Parameters

ipv6-address: Specifies a gateway address. The IPv6 address must be an IPv6 address of the relay interface.

Usage guidelines

The DHCPv6 relay agent uses the specified IPv6 address instead of the first IPv6 address of the relay interface as the gateway address for DHCPv6 clients.

If you execute this command multiple times, the most recent configuration takes effect.

Examples

# Specify 10::1 as the gateway address for DHCPv6 clients on GigabitEthernet 1/0/1.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] ipv6 dhcp relay gateway 10::1

Related commands

gateway-list

ipv6 dhcp relay interface-id

Use ipv6 dhcp relay interface-id to specify a padding mode for the Interface-ID option.

Use undo ipv6 dhcp relay interface-id to restore the default.

Syntax

ipv6 dhcp relay interface-id { bas | interface }

undo ipv6 dhcp relay interface-id

Default

The DHCPv6 relay agent fills the Interface-ID option with the interface index of the interface.

Views

Interface view

Predefined user roles

network-admin

context-admin

Parameters

bas: Specifies the BAS mode.

interface: Specifies the interface name mode. This mode pads the Interface-ID option in ASCII code with the interface name and VLAN ID of the interface.

Usage guidelines

Enable the DHCPv6 relay agent on the interface before executing this command. Otherwise, the command does not take effect.

Examples

# Specify the BAS mode as the padding mode for the Interface-ID option on GigabitEthernet 1/0/1.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] ipv6 dhcp relay interface-id bas

# Specify the interface name mode as the padding mode for the Interface-ID option on GigabitEthernet 1/0/1.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] ipv6 dhcp relay interface-id interface

ipv6 dhcp relay server-address

Use ipv6 dhcp relay server-address to specify a DHCPv6 server on the DHCPv6 relay agent.

Use undo ipv6 dhcp relay server-address to remove DHCPv6 server addresses.

Syntax

ipv6 dhcp relay server-address ipv6-address [ interface interface-type interface-number ]

undo ipv6 dhcp relay server-address [ ipv6-address [ interface interface-type interface-number ] ]

Default

No DHCPv6 server address is specified on the DHCPv6 relay agent.

Views

Interface view

Predefined user roles

network-admin

context-admin

Parameters

ipv6-address: Specifies the IPv6 address of a DHCPv6 server.

interface interface-type interface-number: Specifies an output interface through which the relay agent forwards the DHCPv6 requests to the DHCPv6 server. If you do not specify an output interface, the relay agent looks up the routing table for an output interface.

Usage guidelines

Upon receiving a request from a DHCPv6 client, the interface encapsulates the request into a Relay-forward message and forwards the message to the specified DHCPv6 server.

You can specify a maximum of eight DHCPv6 servers on an interface. The DHCPv6 relay agent forwards DHCP requests to all the specified DHCPv6 servers.

If the DHCPv6 server address is a link-local address or multicast address, you must specify an output interface. If you do not specify an output interface, DHCPv6 packets might fail to reach the DHCPv6 server.

If you do not specify an IPv6 address, the undo ipv6 dhcp relay server-address command removes all DHCPv6 server addresses specified on the interface.

Do not enable the DHCPv6 client and the DHCPv6 relay agent on the same interface.

Examples

# Enable the DHCPv6 relay agent on GigabitEthernet 1/0/1 and specify the DHCPv6 server address 2001:1::3.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] ipv6 dhcp select relay

[Sysname-GigabitEthernet1/0/1] ipv6 dhcp relay server-address 2001:1::3

Related commands

display ipv6 dhcp relay server-address

ipv6 dhcp select

remote-server

Use remote-server to specify DHCPv6 servers for a DHCPv6 address pool.

Use undo remote-server to remove DHCPv6 servers from a DHCPv6 address pool.

Syntax

remote-server ipv6-address [ interface interface-type interface-number ]

undo remote-server [ ipv6-address [ interface interface-type interface-number ] ]

Default

No DHCPv6 server is specified for the DHCPv6 address pool.

Views

DHCPv6 address pool view

Predefined user roles

network-admin

context-admin

Parameters

ipv6-address: Specifies a DHCPv6 server address.

interface interface-type interface-number: Specifies the outgoing interface by its type and number for the DHCPv6 relay agent to forward packets to the DHCPv6 server. If you do not specify an outgoing interface, the DHCPv6 relay agent performs a routing table lookup.

Usage guidelines

You can specify a maximum of eight DHCPv6 servers in one DHCPv6 address pool.

If you do not specify any parameters, the undo remote-server command removes all DHCPv6 servers in the DHCPv6 address pool.

If a DHCPv6 server address is a link-local address, you must specify an outgoing interface by using the interface keyword in this command. If you do not specify an outgoing interface, DHCPv6 packets might fail to reach the DHCPv6 server.

Examples

# Specify DHCPv6 server 10::1 for DHCPv6 address pool 0.

<Sysname> system-view

[Sysname] ipv6 dhcp pool 0

[Sysname-dhcp6-pool-0] remote-server 10::1

reset ipv6 dhcp relay statistics

Use reset ipv6 dhcp relay statistics to clear packets statistics on the DHCPv6 relay agent.

Syntax

reset ipv6 dhcp relay statistics [ interface interface-type interface-number ]

Views

User view

Predefined user roles

network-admin

context-admin

Parameters

interface interface-type interface-number: Specifies an interface by its type and number. If you do not specify an interface, this command clears all relay agent statistics.

Examples

# Clear packet statistics on the DHCPv6 relay agent.

<Sysname> reset ipv6 dhcp relay statistics

Related commands

display ipv6 dhcp relay statistics

DHCPv6 client commands

display ipv6 dhcp client

Use display ipv6 dhcp client to display DHCPv6 client information.

Syntax

display ipv6 dhcp client [ interface interface-type interface-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

context-admin

context-operator

Parameters

interface interface-type interface-number: Specifies an interface by its type and number. If you do not specify an interface, this command displays information about all DHCPv6 clients.

Examples

# Display the DHCPv6 client information on GigabitEthernet 1/0/1.

<Sysname> display ipv6 dhcp client interface gigabitethernet 1/0/1

GigabitEthernet1/0/1:

Type: Stateful client requesting address and prefix

State: OPEN

Client DUID: 0003000100e002000000

Preferred server

Reachable via address: FE80::2E0:1FF:FE00:18

Server DUID: 0003000100e001000000

IA_NA: IAID 0x00000642, T1 50 sec, T2 80 sec

Address: 1:1::2/128

Preferred lifetime 100 sec, valid lifetime 200 sec

Will expire on Feb 4 2014 at 15:37:20(288 seconds left)

IA_PD: IAID 0x00000642, T1 50 sec, T2 80 sec

Prefix: 12:34::/48

Preferred lifetime 100 sec, valid lifetime 200 sec

Will expire on Mar 27 2014 at 08:13:24 (199 seconds left)

DNS server addresses:

2:2::3

Domain name:

aaa.com

SIP server addresses:

2:2::4

SIP server domain names:

bbb.com

Options:

Code: 88

Length: 3 bytes

Hex: AABBCC

Table 13 Command output

Field	Description
Type	Types of DHCPv6 client: · Stateful client requesting address—A DHCPv6 client that requests an IPv6 address. · Stateful client requesting prefix—A DHCPv6 client that requests an IPv6 prefix. · Stateful client requesting address and prefix—A DHCPv6 client that requests an IPv6 address and prefix. · Stateless client—A DHCPv6 client that requests configuration parameters other than an IPv6 address and prefix through stateless DHCPv6.
State	Current state of the DHCPv6 client: · IDLE—The client is in idle state. · SOLICIT—The client is locating a DHCPv6 server. · REQUEST—The client is requesting an IPv6 address or prefix. · OPEN—The client has obtained an IPv6 address or prefix. · RENEW—The client is extending the lease (after T1 and before T2). · REBIND—The client is extending the lease (after T2 and before the lease expires). · RELEASE—The client is releasing an IPv6 address or prefix. · DECLINE—The client is declining an IPv6 address or prefix because of an address or prefix conflict. · INFO-REQUESTING—The client is requesting configuration parameters through stateless DHCPv6.
Client DUID	DUID of the DHCPv6 client.
Preferred server	Information about the DHCPv6 server selected by the DHCPv6 client.
Reachable via address	Reachable address for the DHCPv6 client. It is the link local address of the DHCPv6 server or DHCPv6 relay agent.
Server DUID	DUID of the DHCPv6 server.
IA_NA	IA_NA information.
IA_PD	IA_PD information.
IAID	IA identifier.
T1	T1 value in seconds.
T2	T2 value in seconds.
Address	IPv6 address obtained. This field is displayed only when the DHCPv6 client type is Stateful client requesting address.
Prefix	IPv6 prefix obtained. This field is displayed only when the DHCPv6 client type is Stateful client requesting prefix.
Preferred lifetime	Preferred lifetime in seconds.
valid lifetime	Valid lifetime in seconds.
Will expire on Feb 4 2014 at 15:37:20 (288 seconds left)	Time when the lease expires and the remaining time of the lease. If the lease expires after the year 2100, this field displays Will expire after 2100.
DNS server addresses	IPv6 address of the DNS server.
Domain name	Domain name suffix.
SIP server addresses	IPv6 address of the SIP server.
SIP server domain names	Domain name of the SIP server.
Options	Self-defined options.
Code	Code of the self-defined option.
Length	Self-defined option length in bytes.
Hex	Self-defined option content represented by a hexadecimal number.

Related commands

ipv6 address dhcp-alloc

ipv6 dhcp client duid

ipv6 dhcp client pd

display ipv6 dhcp client statistics

Use display ipv6 dhcp client statistics to display DHCPv6 client statistics.

Syntax

display ipv6 dhcp client statistics [ interface interface-type interface-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

context-admin

context-operator

Parameters

interface interface-type interface-number: Specifies an interface by its type and number. If you do not specify an interface, this command displays statistics for all DHCPv6 clients.

Examples

# Display DHCPv6 client statistics on GigabitEthernet 1/0/1.

<Sysname> display ipv6 dhcp client statistics interface gigabitethernet 1/0/1

Interface : GigabitEthernet1/0/1

Packets received : 1

Reply : 1

Advertise : 0

Reconfigure : 0

Invalid : 0

Packets sent : 5

Solicit : 0

Request : 0

Renew : 0

Rebind : 0

Information-request : 5

Release : 0

Decline : 0

Table 14 Command output

Field	Description
Interface	Interface that acts as the DHCPv6 client.
Packets Received	Number of received packets.
Reply	Number of received reply packets.
Advertise	Number of received advertise packets.
Reconfigure	Number of received reconfigure packets.
Invalid	Number of invalid packets.
Packets sent	Number of sent packets.
Solicit	Number of sent solicit packets.
Request	Number of sent request packets.
Renew	Number of sent renew packets.
Rebind	Number of sent rebind packets.
Information-request	Number of sent information request packets.
Release	Number of sent release packets.
Decline	Number of sent decline packets.

Related commands

reset ipv6 dhcp client statistics

ipv6 address dhcp-alloc

Use ipv6 address dhcp-alloc to configure an interface to use DHCPv6 for IPv6 address acquisition.

Use undo ipv6 address dhcp-alloc to cancel an interface from using DHCPv6, and clear the obtained IPv6 address and other configuration parameters.

Syntax

ipv6 address dhcp-alloc [ option-group option-group-number | rapid-commit ] *

undo ipv6 address dhcp-alloc

Default

An interface does not use DHCPv6 for IPv6 address acquisition.

Views

Layer 3 Ethernet interface view

Layer 3 Ethernet subinterface view

Layer 3 aggregate interface view

Layer 3 aggregate subinterface view

VLAN interface view

Reth interface view

Reth subinterface view

Predefined user roles

network-admin

context-admin

Parameters

option-group option-group-number: Enables the DHCPv6 client to create a dynamic DHCPv6 option group for saving the configuration parameters, and assigns an ID to the option group. The value range for the ID is 1 to 100. If you do not specify this option, the DHCPv6 client does not create any dynamic DHCPv6 option groups.

rapid-commit: Supports rapid address or prefix assignment.

Examples

# Configure GigabitEthernet 1/0/1 to use DHCPv6 for IPv6 address acquisition. Configure the DHCPv6 client to support rapid address assignment and create dynamic DHCPv6 option group 1 for the configuration parameters obtained.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] ipv6 address dhcp-alloc rapid-commit option-group 1

Related commands

display ipv6 dhcp client

ipv6 dhcp client dscp

Use ipv6 dhcp client dscp to set the DSCP value for DHCPv6 packets sent by the DHCPv6 client.

Use undo ipv6 dhcp client dscp to restore the default.

Syntax

ipv6 dhcp client dscp dscp-value

undo ipv6 dhcp client dscp

Default

The DSCP value in DHCPv6 packets is 56.

Views

System view

Predefined user roles

network-admin

context-admin

Parameters

dscp-value: Sets the DSCP value for DHCP packets, in the range of 0 to 63.

Usage guidelines

The DSCP value is carried in the Traffic class field of a DHCPv6 packet. It specifies the priority level of the packet and affects the transmission priority of the packet. A bigger DSCP value represents a higher priority.

Examples

# Set the DSCP value to 30 for DHCPv6 packets sent by the DHCPv6 client.

<Sysname> system-view

[Sysname] ipv6 dhcp client dscp 30

ipv6 dhcp client duid

Use ipv6 dhcp client duid to configure the DHCPv6 client DUID for an interface.

Use undo ipv6 dhcp client duid to restore the default.

Syntax

ipv6 dhcp client duid { ascii ascii-string | hex hex-string | mac interface-type interface-number }

undo ipv6 dhcp client duid

Default

The interface uses the device bridge MAC address to generate its DHCPv6 client DUID.

Views

Layer 3 Ethernet interface view

Layer 3 Ethernet subinterface view

Layer 3 aggregate interface view

Layer 3 aggregate subinterface view

VLAN interface view

Reth interface view

Reth subinterface view

Predefined user roles

network-admin

context-admin

Parameters

ascii ascii-string: Specifies a case-sensitive ASCII string of 1 to 130 characters as the DHCPv6 client DUID.

hex hex-string: Specifies a hexadecimal number of 2 to 260 characters as the DHCPv6 client DUID.

mac interface-type interface-number: Specifies the MAC address of the specified interface as the DHCPv6 client DUID. The interface-type interface-number arguments specify an interface by its type and number.

Usage guidelines

A DHCPv6 client pads its DUID into the Option 1 of the DHCPv6 packet that it sends to the DHCPv6 server. The DHCPv6 server can assign specific IPv6 addresses or prefixes to DHCPv6 clients with specific DUIDs.

The DUID of a DHCPv6 client is the globally unique identifier of the client, so make sure the DUID that you configure is unique.

Examples

# Specify the MAC address of GigabitEthernet 1/0/2 as the DHCPv6 client DUID for GigabitEthernet 1/0/1.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] ipv6 dhcp client duid mac gigabitethernet 1/0/2

Related commands

display ipv6 dhcp client

ipv6 dhcp client pd

Use ipv6 dhcp client pd to configure an interface to use DHCPv6 for IPv6 prefix acquisition.

Use undo ipv6 dhcp client pd to cancel an interface from using DHCPv6, and clear the obtained IPv6 prefix and other configuration parameters.

Syntax

ipv6 dhcp client pd prefix-number [ option-group option-group-number | rapid-commit ]*

undo ipv6 dhcp client pd

Default

An interface does not use DHCPv6 for IPv6 prefix acquisition.

Views

Layer 3 Ethernet interface view

Layer 3 Ethernet subinterface view

Layer 3 aggregate interface view

Layer 3 aggregate subinterface view

VLAN interface view

Reth interface view

Reth subinterface view

Predefined user roles

network-admin

context-admin

Parameters

prefix-number: Specifies an IPv6 prefix ID in the range of 1 to 1024. After obtaining an IPv6 prefix, the client assigns the ID to the IPv6 prefix.

rapid-commit: Supports rapid address or prefix assignment.

Examples

# Configure GigabitEthernet 1/0/1 to use DHCPv6 for IPv6 prefix acquisition. Specify IDs for the dynamic IPv6 prefix and dynamic DHCPv6 option group, and configure the client to support rapid prefix assignment.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] ipv6 dhcp client pd 1 rapid-commit option-group 1

Related commands

display ipv6 dhcp client

ipv6 dhcp client stateful

Use ipv6 dhcp client stateful to configure an interface to use DHCPv6 for IPv6 address and prefix acquisition.

Use undo ipv6 dhcp client stateful to cancel an interface from using DHCPv6, and clear the obtained IPv6 address, prefix, and other configuration parameters.

Syntax

ipv6 dhcp client stateful prefix prefix-number [ option-group option-group-number | rapid-commit ] *

undo ipv6 dhcp client stateful

Default

An interface does not use DHCPv6 for IPv6 address and prefix acquisition.

Views

Layer 3 Ethernet interface view

Layer 3 Ethernet subinterface view

Layer 3 aggregate interface view

Layer 3 aggregate subinterface view

VLAN interface view

Reth interface view

Reth subinterface view

Predefined user roles

network-admin

context-admin

Parameters

prefix prefix-number: Specifies an IPv6 prefix ID in the range of 1 to 1024. After obtaining an IPv6 prefix, the client assigns the ID to the IPv6 prefix.

rapid-commit: Supports rapid address and prefix assignment.

Usage guidelines

The ipv6 dhcp client stateful command takes effect if it is configured with the ipv6 address dhcp-alloc and ipv6 dhcp client pd commands on an interface. You must execute the undo ipv6 dhcp client stateful command to have the ipv6 address dhcp-alloc and ipv6 dhcp client pd commands take effect.

Examples

# Configure GigabitEthernet 1/0/1 to use DHCPv6 for IPv6 address and prefix acquisition. Specify IDs for the dynamic IPv6 prefix and dynamic DHCPv6 option group, and configure the client to support rapid address and prefix assignment.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] ipv6 dhcp client stateful prefix 1 rapid-commit option-group 1

Related commands

ipv6 address dhcp-alloc

ipv6 dhcp client pd

ipv6 dhcp client stateless enable

Use ipv6 dhcp client stateless enable to enable stateless DHCPv6.

Use undo ipv6 dhcp client stateless enable to disable stateless DHCPv6.

Syntax

ipv6 dhcp client stateless enable

undo ipv6 dhcp client stateless enable

Default

Stateless DHCPv6 is disabled.

Views

Layer 3 Ethernet interface view

Layer 3 Ethernet subinterface view

Layer 3 aggregate interface view

Layer 3 aggregate subinterface view

VLAN interface view

Reth interface view

Reth subinterface view

Predefined user roles

network-admin

context-admin

Usage guidelines

Stateless DHCPv6 enables the interface to send an Information-request message to the multicast address of all DHCPv6 servers and DHCPv6 relay agents for configuration parameters.

Examples

# Enable stateless DHCPv6 on GigabitEthernet 1/0/1.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] ipv6 dhcp client stateless enable

reset ipv6 dhcp client statistics

Use reset ipv6 dhcp client statistics to clear DHCPv6 client statistics.

Syntax

reset ipv6 dhcp client statistics [ interface interface-type interface-number ]

Views

User view

Predefined user roles

network-admin

context-admin

Parameters

interface interface-type interface-number: Specifies an interface by its type and number. If you do not specify an interface, this command clears all DHCPv6 client statistics.

Examples

# Clear all DHCPv6 client statistics.

<Sysname> reset ipv6 dhcp client statistics

Related commands

display ipv6 dhcp client statistics

11-Layer 3—IP Services Command Reference

DHCPv6 commands

DHCPv6 server commands

display ipv6 dhcp prefix-pool

display ipv6 dhcp server

display ipv6 dhcp server conflict

remote-server

DHCPv6 client commands

display ipv6 dhcp client

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