vrrp vrid track link-bfd down-number

Function

The vrrp vrid track link-bfd down-number command sets a threshold for the number of link BFD sessions tracked by a VRRP group that go Down. When the number of link BFD sessions tracked by the VRRP group that go Down reaches or exceeds the specified threshold, the VRRP group performs a master/backup switchover.

The undo vrrp vrid track link-bfd command deletes the configured threshold.

By default, a VRRP group performs a master/backup VRRP switchover only when all link BFD sessions tracked by it go Down.

Format

vrrp vrid virtual-router-id track link-bfd down-number down-number

undo vrrp vrid virtual-router-id track link-bfd

Parameters

Parameter	Description	Value
down-number	Specifies a threshold for the number of link BFD sessions tracked by a VRRP group that go Down.	The value is an integer ranging from 1 to 8.
vrid virtual-router-id	Specifies the ID of a VRRP group.	The value is an integer ranging from 1 to 255.

Parameter

Description

Value

down-number

Specifies a threshold for the number of link BFD sessions tracked by a VRRP group that go Down.

The value is an integer ranging from 1 to 8.

vrid virtual-router-id

Specifies the ID of a VRRP group.

The value is an integer ranging from 1 to 255.

Views

100ge sub-interface view, 100GE interface view, 10GE sub-interface view, 10GE interface view, 200GE sub-interface view, 25GE sub-interface view, 25GE interface view, 400GE sub-interface view, 400GE interface view, 40GE sub-interface view, 40GE interface view, 50GE sub-interface view, 50GE interface view, Eth-Trunk sub-interface view, Eth-Trunk interface view, FlexE interface view, GE optical interface view, GE sub-interface view, GE interface view, GE electrical interface view, Global VE sub-interface view, VBDIF interface view, VE sub-interface view, VLANIF interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
vrrp	write

Usage Guidelines

Usage Scenario

If a VRRP group is bound to multiple link BFD sessions and the vrrp vrid track link-bfd command is not run, the VRRP group performs a master/backup VRRP switchover only when all link BFD sessions go Down. To improve network stability and reliability, run the vrrp vrid track link-bfd command to set a threshold for the number of link BFD sessions tracked by the VRRP group that go Down.

If the number of link BFD sessions tracked by the VRRP group that go Down reaches or exceeds the specified threshold, the VRRP group performs a master/backup VRRP switchover.
If the number of link BFD sessions tracked by the VRRP group that go Down does not reach the specified threshold, the VRRP group does not perform a master/backup VRRP switchover.
If the number of link BFD sessions tracked by the VRRP group is less than the value specified by the parameter, the VRRP group performs a master/backup VRRP switchover only when all tracked link BFD sessions go Down.

Prerequisites

A VRRP group and a link BFD session have been configured.

Example

# Set the threshold for the number of link BFD sessions tracked by a VRRP group that go Down to 2 on GE 0/1/1.

<HUAWEI> system-view
[~HUAWEI] interface GigabitEthernet 0/1/1
[~HUAWEI-GigabitEthernet0/1/1] ip address 10.10.10.6 24
[*HUAWEI-GigabitEthernet0/1/1] vrrp vrid 1 virtual-ip 10.10.10.185
[*HUAWEI-GigabitEthernet0/1/1] vrrp vrid 1 track link-bfd down-number 2