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VRRP with cRPD
Overview
The Virtual Router Redundancy Protocol (VRRP) in cRPD eliminates the single point of failure in the static default route environment. VRRP dynamically assigns responisbility for a virtual router to one of the VRRP routers. The VRRP router that controls the IP address associated with the virtual router is called Master. Master forwards the packets to these IP address.
When the master router is unavailable, any of the virtual routers IP address is used as the default first hop router by end hosts.
Benefit of VRRP
Supports high availability default path without configuring dynamic routing on every end host.
How VRRP Works with cRPD?
SUMMARY This example configuration provides steps on how to configure active/back up load balancing feature using VRRP in cRPD. To achieve this support, you must configure VRRP instance with a virtual address in two cRPD containers. One as a master and other as a backup. When the failover happens the virtual address is taken by the backup router from the master router.
Use the following commands to verify that cRPD1 has transitioned to backup state and that the router is backup for group ens3f1_v4_111.
user@crpd1> show vrrp Interface State Group VR-state VR Mode Interface-address Virtual-address ens3f1 up ens3f1_v4_111 backup Inactive 10.0.0.1/24 10.0.0.254/32
user@crpd1> show vrrp track Track Int State VRRP int Group VR State Priority ens3f2 up ens3f1 ens3f1_v4_111 backup 200
Use the following commands to verify that the instance has transitioned to master state and that the router is master for group ens3f1_v4_111.
user@crpd1> show vrrp Interface State Group VR-state VR Mode Interface-address Virtual-address ens3f1 up ens3f1_v4_111 master Active 10.0.0.2/24 10.0.0.254/32
user@crpd1> show vrrp track Track Int State VRRP int Group VR State Priority ens3f2 up ens3f1 ens3f1_v4_111 master 200