Configuring VRRP6 Association

This section describes how to configure VRRP6 association. If a network link fails, VRRP6 association enables a VRRP6 group to rapidly perform a master/backup VRRP6 switchover, which ensures correct service traffic forwarding.

Usage Scenario

A VRRP6 group uses VRRP6 Advertisement packets to negotiate the master/backup VRRP6 status. If a network fault occurs (for example, an interface goes Down or a link fails) or a network is modified, a VRRP6 group cannot promptly detect the fault or modification. As a result, a master/backup VRRP6 switchover cannot be promptly performed. To resolve this issue, configure VRRP6 association. If an object associated with a VRRP6 group fails, the VRRP6 group is notified of the fault and performs a master/backup VRRP6 switchover. VRRP6 association ensures service continuity and link reliability.

**Table 1** Objects with which a VRRP6 group is associated and usage scenarios
Association Type	Object	Usage Scenario
A VRRP6 group monitors the status of another feature. If the monitored object's status changes, the VRRP6 group is notified of the status change and performs a master/backup VRRP6 switchover.	Specified interface	A VRRP6 group checks status changes only in the interface on which the VRRP6 group is configured. You can associate a VRRP6 group with a specified interface that is not in the VRRP6 group. If the monitored interface's status changes, the VRRP6-enabled devices change the VRRP6 priorities and elect a master device.
	BFD	BFD can rapidly detect link faults. You can associate a VRRP6 group with a BFD session. If a link fault occurs, BFD detects the fault, changes the BFD session status, and notifies the VRRP6 group of the fault. This process triggers a rapid master/backup VRRP6 switchover.

Pre-configuration Tasks

Before configuring VRRP6 association, complete the following tasks:

Configure basic VRRP6 group functions.
Configure common static BFD sessions or static BFD sessions with automatically negotiated discriminators.

Associating a VRRP6 Group with a VRRP6-disabled Interface: This section describes how to associate a VRRP6 group with a VRRP6-disabled interface on the master device. If the master device detects that the status of the VRRP6-disabled interface changed, it rapidly performs a master/backup VRRP6 switchover.

Associating VRRP6 with IPv6 BFD to Implement a Rapid Master/Backup VRRP6 Switchover: You can associate a VRRP6 group with an IPv6 BFD session. If the status of the IPv6 BFD session changes, IPv6 BFD notifies the VRRP6 group of the change. After receiving the notification, the VRRP6 group rapidly performs a master/backup VRRP6 switchover.

Verifying the VRRP6 Association Configuration: After associating a VRRP6 group with a VRRP6-disabled interface or a BFD session, verify the configurations.