monitor-group (MPLS-L2VPN view)

Function

The monitor-group command creates an L2VPN monitoring group or displays the view of an existing L2VPN monitoring group.

The undo monitor-group command deletes an L2VPN monitoring group.

By default, no L2VPN monitoring group is created.

Format

monitor-group group-name

undo monitor-group group-name

Parameters

Parameter	Description	Value
group-name	Specifies the name of an L2VPN monitoring group.	The value is a string of 1 to 31 case-sensitive characters without spaces.

Parameter

Description

Value

group-name

Specifies the name of an L2VPN monitoring group.

The value is a string of 1 to 31 case-sensitive characters without spaces.

Views

MPLS-L2VPN view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
l2vpn	write

Usage Guidelines

Usage Scenario

In a link protection scenario, if both the primary and secondary PWs go faulty, the service VSI PW and the protocol VSI PW also go faulty. When the fault is rectified, the service VSI PW may go Up before the protocol VSI PW. This results in a service VSI loop and adversely affects service traffic.

To solve this problem, run the monitor-group command to create an L2VPN monitoring group, bind the protocol VSI PW to the monitoring group, and specify the monitoring group to be tracked in the service VSI. When the protocol VSI PW bound to the monitoring group goes Up, the device blocks the service VSI PW by changing its status to not forwarding and starts the hold-off timer. After the timer expires, the service PW is unblocked. This ensures that service VSI loops do not occur in such a scenario.

Precautions

A maximum of 512 L2VPN monitoring groups can be created.

Example

# Create an L2VPN monitoring group named group1.

<HUAWEI> system-view
[~HUAWEI] mpls
[*HUAWEI-mpls] quit
[*HUAWEI] mpls l2vpn
[*HUAWEI-l2vpn] monitor-group group1
[*HUAWEI-l2vpn-monitor-group-group1]