07-Smart Link commands
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Use display smart-link flush to display information about the received flush messages.
Syntax
display smart-link flush
Views
Any view
Predefined user roles
network-admin
network-operator
context-admin
context-operator
Examples
# Display information about the received flush messages.
<Sysname> display smart-link flush
Received flush packets : 10
Receiving interface of the last flush packet : GigabitEthernet1/2/5/1
Receiving time of the last flush packet : 19:19:03 2012/04/21
Device ID of the last flush packet : 000f-e200-8500
Control VLAN of the last flush packet : 1
Table 1 Command output
|
Field |
Description |
|
Received flush packets |
Total number of received flush messages. |
|
Receiving interface of the last flush packet |
Port that received the last flush message. |
|
Receiving time of the last flush packet |
Time when the last flush message was received. |
|
Device ID of the last flush packet |
Device ID carried in the last flush message. |
|
Control VLAN of the last flush packet |
Control VLAN ID carried in the last flush message. |
reset smart-link statistics
Use display smart-link group to display information about the specified or all smart link groups.
Syntax
display smart-link group { group-id | all }
Views
Any view
Predefined user roles
network-admin
network-operator
context-admin
context-operator
Parameters
group-id: Specifies a smart link group by its ID. The value range for this argument is 1 to 48.
all: Displays information about all smart link groups.
Examples
# Display information about smart link group 1.
<Sysname> display smart-link group 1
Smart link group 1 information:
Device ID : 0011-2200-0001
Preemption mode : None
Preemption delay: 1(s)
Control VLAN : 1
Protected VLAN : Reference Instance 2, 4
Member Role State Flush-count Last-flush-time
-----------------------------------------------------------------------------
GE1/2/5/1 PRIMARY ACTIVE 1 16:45:20 2012/04/21
GE1/2/5/2 SECONDARY STANDBY 2 16:37:20 2012/04/21
Table 2 Command output
|
Field |
Description |
|
Preemption mode |
Preemption mode: · None—Preemption disabled. · Role—Role preemption mode. · Speed—Speed preemption mode. |
|
Preemption delay |
Preemption delay time, in seconds. |
|
Control-VLAN |
Control VLAN ID. |
|
Protected VLAN |
Protected VLANs of the smart link group. Referenced Multiple Spanning Tree Instances (MSTIs) are displayed. To view the VLANs mapped to the referenced MSTIs, use the display stp region-configuration command. |
|
Member |
Member port of the smart link group. |
|
Role |
Port role: primary or secondary. |
|
State |
Port state: active, down, or standby. |
|
Flush-count |
Number of transmitted flush messages. |
|
Last-flush-time |
Time when the last flush message was transmitted (NA indicates that no flush message has been transmitted). |
Use flush enable to enable flush update.
Use undo flush enable to disable flush update.
Syntax
flush enable [ control-vlan vlan-id ]
undo flush enable
Default
Flush update is enabled for smart link groups, and VLAN 1 is used for flush message transmission.
Views
Smart link group view
Predefined user roles
network-admin
context-admin
Parameters
control-vlan vlan-id: Specifies the control VLAN used for transmitting flush messages. The vlan-id argument represents the control VLAN ID and is in the range of 1 to 4094.
Usage guidelines
You must configure different control VLANs for different smart link groups.
· Make sure the configured control VLAN already exists, and assign the smart link group member ports to the control VLAN.
· The control VLAN of a smart link group must also be one of its protected VLANs. Do not remove the control VLAN. Otherwise, flush messages cannot be sent correctly.
Examples
# Disable flush update for smart link group 1.
<Sysname> system-view
[Sysname] smart-link group 1
[Sysname-smlk-group1] undo flush enable
Related commands
smart-link flush enable
Use port to assign a port to a smart link group and specify the port role.
Use undo port to remove a port from a smart link group.
Syntax
port interface-type interface-number { primary | secondary }
undo port interface-type interface-number
Default
No member ports exist in a smart link group.
Views
Smart link group view
Predefined user roles
network-admin
context-admin
Parameters
interface-type interface-number: Specifies a port by its type and number, which can be a Layer 2 Ethernet interface or Layer 2 aggregate interface.
primary: Specifies a port as the primary port.
secondary: Specifies a port as the secondary port.
Usage guidelines
Before configuring member ports for a smart link group, you must configure protected VLANs for the smart link group.
Disable the spanning tree feature on the ports you want to add to the smart link group. You cannot enable the spanning tree feature on a smart link group member port.
If you configure a port as both an aggregation group member and a smart link group member, only the aggregation group member configuration takes effect. The port is not shown in the output from the display smart-link group command. The smart link group member configuration takes effect after the port leaves the aggregation group.
You can also assign a port to a smart link group by using the port smart-link group command in interface view.
Examples
# Configure GigabitEthernet 1/2/5/1 as the secondary port of smart link group 1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/2/5/1
[Sysname-GigabitEthernet1/2/5/1] undo stp enable
[Sysname-GigabitEthernet1/2/5/1] quit
[Sysname] smart-link group 1
[Sysname-smlk-group1] protected-vlan reference-instance 0
[Sysname-smlk-group1] port gigabitethernet 1/2/5/1 secondary
Related commands
port smart-link group
Use port smart-link group to assign a port to a smart link group and specify the port role.
Use undo port smart-link group to remove a port from a smart link group.
Syntax
port smart-link group group-id { primary | secondary }
undo port smart-link group group-id
A port is not a smart link group member.
Views
Layer 2 Ethernet interface view
Layer 2 aggregate interface view
Predefined user roles
network-admin
context-admin
Parameters
group-id: Specifies a smart link group by its ID. The value range for this argument is 1 to 48.
primary: Specifies the port as the primary port.
secondary: Specifies the port as the secondary port.
Usage guidelines
Before configuring member ports for a smart link group, you must configure protected VLANs for the smart link group.
Disable the spanning tree feature on the ports you want to add to the smart link group. You cannot enable the spanning tree feature on a smart link group member port.
If you configure a port as both an aggregation group member and a smart link group member, only the aggregation group member configuration takes effect. The port is not shown in the output from the display smart-link group command. The smart link group member configuration takes effect after the port leaves the aggregation group.
You can assign a port to a smart link group by using the port command in smart link group view.
Examples
# Configure GigabitEthernet 1/2/5/1 as the primary port of smart link group 1.
<Sysname> system-view
[Sysname] smart-link group 1
[Sysname-smlk-group1] protected-vlan reference-instance 0
[Sysname-smlk-group1] quit
[Sysname] interface gigabitethernet 1/2/5/1
[Sysname-GigabitEthernet1/2/5/1] undo stp enable
[Sysname-GigabitEthernet1/2/5/1] port smart-link group 1 primary
# Configure Layer 2 aggregate interface 1 as the primary port of smart link group 1.
<Sysname> system-view
[Sysname] smart-link group 1
[Sysname-smlk-group1] protected-vlan reference-instance 0
[Sysname-smlk-group1] quit
[Sysname] interface bridge-aggregation 1
[Sysname-Bridge-Aggregation1] undo stp enable
[Sysname-Bridge-Aggregation1] port smart-link group 1 primary
port
Use preemption delay to set the preemption delay.
Use undo preemption delay to restore the default.
Syntax
preemption delay delay
undo preemption delay
Default
The preemption delay is 1 second.
Views
Smart link group view
Predefined user roles
network-admin
context-admin
Parameters
delay: Specifies the preemption delay in the range of 0 to 300 seconds.
Usage guidelines
Preemption delay is the period of time that the primary port waits before taking over to collaborate with the switchover of upstream devices.
The preemption delay configuration takes effect only after a preemption mode is configured.
Examples
# Enable role preemption and set the preemption delay to 10 seconds.
<Sysname> system-view
[Sysname] smart-link group 1
[Sysname-smlk-group1] preemption mode role
[Sysname-smlk-group1] preemption delay 10
Related commands
preemption mode
Use preemption mode to configure a preemption mode for a smart link group.
Use undo preemption mode to restore the default.
Syntax
preemption mode { role | speed [ threshold threshold-value ] }
undo preemption mode
Default
No preemption mode is configured for a smart link group.
Views
Smart link group view
Predefined user roles
network-admin
context-admin
Parameters
role: Specifies the role preemption mode, which enables the primary port to transition to forwarding state after the primary link recovers.
speed: Specifies the speed preemption mode.
threshold threshold-value: Specifies the speed preemption threshold in percentage. The value range for the threshold-value argument is 1 to 10000.
Usage guidelines
If you specify the speed preemption mode, the following conditions occur when the primary link recovers:
· If you specify the threshold threshold-value option, the primary port transitions to forwarding state when the difference between the primary port speed and the secondary port speed equals or exceeds the threshold value (in percentage) of the secondary port speed.
· If you do not specify the threshold threshold-value option, the primary port transitions to forwarding state when the primary port speed exceeds the secondary port speed.
Examples
# Configure the role preemption mode.
<Sysname> system-view
[Sysname] smart-link group 1
[Sysname-smlk-group1] preemption mode role
# Configure the speed preemption mode and specify the speed preemption threshold as 1000.
<Sysname> system-view
[Sysname] smart-link group 1
[Sysname-smlk-group1] preemption mode speed threshold 1000
Use protected-vlan to configure protected VLANs for a smart link group.
Use undo protected-vlan to remove the protected VLAN of a smart link group.
Syntax
protected-vlan reference-instance instance-id-list
undo protected-vlan [ reference-instance instance-id-list ]
Default
A smart link group does not have protected VLANs.
Views
Smart link group view
Predefined user roles
network-admin
context-admin
Parameters
reference-instance instance-id-list: Specifies a space-separated list of up to 10 MSTI items. Each item specifies an MSTI ID or a range of MSTI IDs in the form of instance-id 1 to instance-id 2. The value range for MSTI IDs is 0 to 4094. 0 represents the common internal spanning tree (CIST). The instance-id 2 must be equal to or greater than instance-id 1. You can use the display stp region-configuration command to display instance-to-VLAN mappings.
Usage guidelines
You must configure all VLANs to which the member ports of a smart link group belongs as protected VLANs.
If the VLAN-to-MSTI mappings change, the protected VLANs change.
To remove protected VLAN configuration, follow these restrictions and guidelines:
· If you specify the reference-instance instance-id-list option, the undo protected-vlan command removes configuration of VLANs mapped to the specified MSTIs. If you do not specify the reference-instance instance-id-list option, the command removes configuration of all protected VLANs.
· If a smart link group has member ports, you cannot remove protected VLAN configuration. If a smart link group does not have member ports, you can remove protected VLAN configuration.
Examples
# Map VLANs 1 through 30 to MSTI 1, and activate the MST region configuration. Configure the VLANs mapped to MSTI 1 as the protected VLANs of smart link group 1.
<Sysname> system-view
[Sysname] stp region-configuration
[Sysname-mst-region] instance 1 vlan 1 to 30
[Sysname-mst-region] active region-configuration
[Sysname-mst-region] quit
[Sysname] smart-link group 1
[Sysname-smlk-group1] protected-vlan reference-instance 1
Related commands
display stp region-configuration (Layer 2—LAN Switching Command Reference)
smart-link group
Use reset smart-link statistics to clear statistics about flush messages.
Syntax
reset smart-link statistics
Views
User view
Predefined user roles
network-admin
context-admin
Examples
# Clear statistics about flush messages.
<Sysname> reset smart-link statistics
Related commands
display smart-link flush
Use smart-link flush enable to enable flush message receiving.
Use undo smart-link flush enable to disable flush message receiving.
Syntax
smart-link flush enable [ control-vlan vlan-id-list ]
undo smart-link flush enable [ control-vlan vlan-id-list ]
Default
Flush message receiving is disabled.
Views
Layer 2 Ethernet interface view
Layer 2 aggregate interface view
Predefined user roles
network-admin
context-admin
Parameters
control-vlan vlan-id-list: Specifies a space-separated list of up to 10 control VLAN items. Each item specifies a control VLAN ID or a range of control VLAN IDs in the form of vlan-id1 to vlan-id2. The value range for the vlan-id argument is 1 to 4094. The vlan-id2 must be equal to or greater than vlan-id1. The default value for the vlan-id-list argument is 1.
Examples
# Enable GigabitEthernet 1/2/5/1 to receive flush messages.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/2/5/1
[Sysname-GigabitEthernet1/2/5/1] smart-link flush enable
# Enable Layer 2 aggregate interface 1 to receive flush messages.
<Sysname> system-view
[Sysname] interface bridge-aggregation 1
[Sysname-Bridge-Aggregation1] smart-link flush enable
Related commands
flush enable
Use smart-link group to create a smart link group and enter its view, or enter the view of an existing smart link group.
Use undo smart-link group to remove a smart link group.
Syntax
smart-link group group-id
undo smart-link group group-id
Default
No smart link groups exist.
Views
System view
Predefined user roles
network-admin
context-admin
Parameters
group-id: Specifies a smart link group ID. The value range for this argument is 1 to 48.
Usage guidelines
You cannot remove a smart link group with member ports.
Examples
# Create smart link group 1 and enter its view.
<Sysname> system-view
[Sysname] smart-link group 1
[Sysname-smlk-group1]
