Virtual Router Redundancy Protocol (VRRP) VRRP overview Configuring VRRP Selecting a Version of VRRP Configuring a VR instance on a VLAN interface Changing VR advertisement interval and source IP address Configuring preempt mode on VRRP backup routers Enabling or disabling VRRP operation on a VR Dynamically changing the priority of the VR Removing all tracked entities Viewing VRRP tracked entities Forcing the backup VR operating as master to relinquish ownership of the VR instance Forcing the backup VR to take ownership of the VR instance Configuring the Authentication Data Field Pinging the virtual IP of a backup router Specifying the time a router waits before taking control of the VIP Viewing VRRP configuration data Using the debug command with the VRRP option General operation Steps for provisioning VRRP operation Dynamically changing the priority of the VR Failover operation Pinging the virtual IP of a backup router Using the Pre-empt Delay Timer (PDT) Standards compliance Operating notes VRRP-Services enhancements VRRP-Show command enhancement Error messages—Track interface