To prevent failures on a VRRP-disabled interface from causing service interruptions, configure a VRRP group to track the VRRP-disabled interface. However, a VRRP group can track only one VRRP-disabled interface at a time. As the network scale is expanding and more interfaces are appearing, a VRRP group is required to track more VRRP-disabled interfaces. If the original technology is used, the configuration workload is very large.
To reduce the configuration workload, you can add multiple VRRP-disabled interfaces to an interface monitoring group and enable a VRRP group to track the interface monitoring group. When the link failure ratio of the interface monitoring group reaches a specified threshold, the VRRP group performs a master/backup switchover to ensure reliable service transmission.
Each interface in an interface monitoring group has a Down weight. If an interface goes Down, the fault weight of the interface monitoring group to which the interface belongs increases; if an interface goes Up, the fault weight of the interface monitoring group to which the interface belongs decreases. The fault weight of an interface monitoring group reflects link quality. VRRP can be configured to track an interface monitoring group. If the fault weight of the interface monitoring group changes, the system notifies the VRRP module of the change. The VRRP module calculates the VRRP priority or status based on the fault rate of the interface monitoring group, configured monitoring mode, and priority change value.
Configuring VRRP to track an interface monitoring group on a device where a VRRP group is configured helps to reduce the workload for configuring the VRRP group to track VRRP-disabled interfaces.