VRRP instance inheritance

VRRP Instance Inheritance allows multiple VRRP instances to follow the state of a lead VRRP instance. This allows the VRRP control plane to handle more VRRP instances without requiring increased control message volumes.

The lead VRRP instance is configured by including the oper-group configuration statement within the lead VRRP instance configuration. The lead instance must be configured with the necessary message timers to detect VRRP failures at the configured rate. The following VRRP instances, referred to as following instances, are then associated with the appropriate lead VRRP instance by including the monitor-oper-group statement (for example, monitor-oper-group “vrrp-LI-1”).

The following are VRRP instance inheritance behaviors:

• One VRRP instance acts as the leading instance and behaves normally. This instance is configured with timers to attain the required detection times.

• The operator can associate additional VRRP instances with the leading VRRP instance by configuring the following instances to monitor the lead oper-group instance.
• Configuration parameters associated with the instance state or priority are ignored within a following VRRP instance.
• If the lead instance becomes primary, all following instances assume a primary role for their respective VRRP instances.
• If the lead instance transitions from primary to standby, all the following instances transition to standby.
• If the lead instance transitions to a down state, all following instances transition to standby.