VRRP V2 can be configured by utilising this method
Inside interface configuration mode, define the group and virtual IP address:
vrrp <group-number> ip <virtual-ip-address>
This all the configuration required to get VRRP running, but there are additional optional configuration that can be added.
A priority can be defined between 0 and 255. Define the priority with the command
vrrp <group-number> priority <priority>. The highest priority becomes the master router. Preemption is enabled by default so changes will be reflected almost immediately.
Authentication can be added with the command
vrrp <group-number> authentication. A plain text password can be sent across the network or a MD5 hash can be utilised instead. Use keywords
md5 key-chain <key-chain-name>,
md5 key-string <key-string>
Hierarchical VRRP Configuration
In IOS XE, VRRP is configured differently.
Begin in global configuration mode with the command
fhrp version vrrp v3 to enable VRRPv3 on the router.
The VRRP instance is then defined inside interface configuration mode with the command
vrrp <group-id> address family complete the command with the address family to be used,
If only VRRPv2 is to be used, it can be changed at this stage with the command
The gateway virtual IP address can be defined with the command
Optionally, the priority of the group can be configured with the command