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Configuring VRRP

Router Type

A VRRP router is either an owner or a Backup. By default, the owner becomes the Master following the

negotiation. A Backup becomes the Master only if the Master becomes unavailable.

NOTE: The IP address(es) you associate with the owner must be a real IP address (or addresses) on the

interface on which you configure the VRID.

When you configure a Backup router, the router interface on which you are configuring the VRID must have a real

IP address that is in the same sub-net as the address associated with the VRID by the owner. However, the

address cannot be the same.

USING THE CLI

To configure Router1 as the owner, enter the following commands:

Router1(config)# inter e 1/6

Router1(config-if-1/6)# ip vrrp vrid 1

Router1(config-if-1/6-vrid-1)# owner

To configure Router2 as a Backup, enter the following commands:

Router2(config)# inter e 1/5

Router2(config-if-1/5)# ip vrrp vrid 1

Router2(config-if-1/5-vrid-1)# backup

syntax: owner [track-priority <value>]

syntax: backup [priority <value>] [track-priority <value>]

Backup Priority

Each router in a VRRP virtual router has a priority. VRRP uses the priority to determine which router wins in the

negotiation for Master router. A Backup VRRP router's priority can be from 3 – 254. Priority 255 is the highest

and designates the Master VRRP router. When you configure a VRRP router interface as the owner for that virtual

router, VRRP assigns priority 255 to the router by default.

If the Master VRRP router becomes unavailable, the Backup VRRP router with the next highest priority becomes

the Master router.

USING THE CLI

To change the VRRP priority of interface 1/5 on Router2 to 50, enter the following commands:

Router2(config)# inter e 1/5

Router2(config-if-1/5)# ip vrrp vrid 1

Router2(config-if-1/5-vrid-1)# backup priority 50

syntax: backup [priority <value>] [track-priority <value>]