08-Monitor Link commands
Chapters Download (48.08 KB)
Use display monitor-link group to display information about monitor link groups.
Syntax
display monitor-link group { group-id | all }
Views
Any view
Predefined user roles
network-admin
network-operator
context-admin
context-operator
Parameters
group-id: Specifies a monitor link group by its ID. The value range for this argument is 1 to 16.
all: Specifies all monitor link groups.
Usage guidelines
This command does not display information about ports that belong to a link aggregation group.
Examples
# Display information about all monitor link groups.
<Sysname> display monitor-link group all
Monitor link protocol status: Disabled
Monitor link group 1 information:
Group status : N/A
Downlink up-delay: 0(s)
Last-up-time : -
Last-down-time : -
Member Role Status
--------------------------------------------
GE1/2/5/1 UPLINK UP
GE1/2/5/2 DOWNLINK UP
Table 1 Command output
|
Field |
Description |
|
Monitor link protocol status |
Whether Monitor Link is enabled: · Enabled. · Disabled. |
|
Group status |
Monitor link group status: · DOWN. · UP. · N/A—Monitor Link is disabled globally. The monitor link group does not operate. |
|
Downlink up-delay |
Switchover delay of the downlink interfaces in the monitor link group, in seconds. |
|
Last-up-time |
Last time when the monitor link group came up. |
|
Last-down-time |
Last time when the monitor link group went down. |
|
Member |
Member interfaces of the monitor link group. |
|
Role |
Interface role, which can be uplink interface or downlink interface. |
|
Status |
Member interface state, which can be up or down. |
Use downlink up-delay to set the switchover delay for the downlink interfaces in a monitor link group.
Use undo downlink up-delay to restore the default.
Syntax
downlink up-delay delay
undo downlink up-delay
Default
The switchover delay is 0 seconds. The downlink interfaces come up as soon as an uplink interface in the monitor link group comes up.
Views
Monitor link group view
Predefined user roles
network-admin
context-admin
Parameters
delay: Sets the switchover delay in the range of 1 to 300 seconds.
Usage guidelines
To avoid frequent state changes of downlink interfaces in the event that the uplink interfaces in the monitor link group flap, you can configure a switchover delay. The switchover delay is the time that the downlink interfaces wait before they come up following an uplink interface.
Examples
# Set the switchover delay to 50 seconds for the downlink interfaces in monitor link group 1.
<Sysname> system-view
[Sysname] monitor-link group 1
[Sysname-mtlk-group1] downlink up-delay 50
Use monitor-link disable to disable Monitor Link globally.
Use undo monitor-link disable to enable Monitor Link globally.
Syntax
monitor-link disable
undo monitor-link disable
Default
Monitor Link is enabled globally.
Views
System view
Predefined user roles
network-admin
context-admin
Usage guidelines
All monitor link groups can operate only after you enable Monitor Link globally. When you disable Monitor Link globally, all monitor link groups cannot operate and the downlink interfaces brought down by the monitor link groups resume their original states.
Examples
# Disable Monitor Link globally.
<Sysname> system-view
[Sysname] monitor-link disable
Use monitor-link group to create a monitor link group and enter its view, or enter the view of an existing monitor link group.
Use undo monitor-link group to remove a monitor link group.
Syntax
monitor-link group group-id
undo monitor-link group group-id
Default
No monitor link groups exist.
Views
System view
Predefined user roles
network-admin
context-admin
Parameters
group-id: Specifies a monitor link group ID. The value range for this argument is 1 to 16.
Examples
# Create monitor link group 1 and enter its view.
<Sysname> system-view
[Sysname] monitor-link group 1
[Sysname-mtlk-group1]
Use port to assign an interface to a monitor link group.
Use undo port to remove an interface from a monitor link group.
port interface-type { interface-number | interface-number.subnumber } { downlink | uplink }
undo port interface-type interface-number
Default
No member interfaces exist in a monitor link group.
Views
Monitor link group view
Predefined user roles
network-admin
context-admin
Parameters
interface-type: Specifies an interface by its type.
interface-number: Specifies an interface by its number.
interface-number.subnumber: Specifies a subinterface by its number. The argument subnumber is in the range of 1 to 4094.
downlink: Specifies a downlink interface.
uplink: Specifies an uplink interface.
Usage guidelines
You can assign an interface to only one monitor link group.
You can also assign an interface to a monitor link group by using the port monitor-link group command in interface view.
If you have configured an interface as the downlink interface of a monitor link group, do not configure its subinterfaces as the uplink interfaces of any monitor link group.
Because the state of subinterfaces is associated with the state of the interface, do not add them to the same monitor link group.
If you have configured a Selected port of an aggregation group as the downlink interface of a monitor link group, do not configure an Unselected port of the aggregation group as the uplink interface of the monitor link group.
Do not assign an aggregate interface and member ports of the aggregate group to the same monitor link group.
Examples
# Configure GigabitEthernet 1/2/5/1 as an uplink interface and GigabitEthernet 1/2/5/2 as a downlink interface for monitor link group 1.
<Sysname> system-view
[Sysname] monitor-link group 1
[Sysname-mtlk-group1] port gigabitethernet 1/2/5/1 uplink
[Sysname-mtlk-group1] port gigabitethernet 1/2/5/2 downlink
port monitor-link group
Use port monitor-link group to assign an interface to a monitor link group.
Use undo port monitor-link group to remove an interface from a monitor link group.
Syntax
port monitor-link group group-id { downlink | uplink }
undo port monitor-link group group-id
Default
An interface is not a monitor link group member.
Views
Layer 2 Ethernet interface view
Layer 3 Ethernet interface/subinterface view
Layer 2 aggregate interface view
Layer 3 aggregate interface/subinterface view
Predefined user roles
network-admin
context-admin
Parameters
group-id: Specifies a monitor link group by its ID. The value range for this argument is 1 to 16.
downlink: Specifies a downlink interface.
uplink: Specifies an uplink interface.
Usage guidelines
You can assign an interface to only one monitor link group.
You can also assign an interface to a monitor link group by using the port command in monitor link group view.
If you have configured an interface as the downlink interface of a monitor link group, do not configure its subinterfaces as the uplink interfaces of any monitor link group.
Because the state of subinterfaces is associated with the state of the interface, do not add the interface and its subinterfaces to the same monitor link group.
If you have configured a Selected port of an aggregation group as the downlink interface of a monitor link group, do not configure an Unselected port of the aggregation group as the uplink interface of the monitor link group.
Do not assign an aggregate interface and member ports of the aggregate group to the same monitor link group.
Examples
# Configure GigabitEthernet 1/2/5/1 as an uplink interface and GigabitEthernet 1/2/5/2 as a downlink interface for monitor link group 1.
<Sysname> system-view
[Sysname] monitor-link group 1
[Sysname-mtlk-group1] quit
[Sysname] interface gigabitethernet 1/2/5/1
[Sysname-GigabitEthernet1/2/5/1] port monitor-link group 1 uplink
[Sysname-GigabitEthernet1/2/5/1] quit
[Sysname] interface gigabitethernet 1/2/5/2
[Sysname-GigabitEthernet1/2/5/2] port monitor-link group 1 downlink
Related commands
port
