VRRP – using 2651xm
No worries if 3550 does not support VRRP.
2651xm real router does!
2651xm-1#sh ip int bri
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 172.16.1.1 YES NVRAM up down
FastEthernet0/1 unassigned YES NVRAM administratively down down
Note: If I use real address as the VRRP ip address then the router becomes the master router for VRRP, priority has no effect on this master router, if VRRP ip address is not using a real address instead a virtual address then router with the highest priority becomes the master router.
2651xm-1(config-if)#vrrp 1 ip 172.16.1.1
(Real router’s ip address)
2651xm-1(config-if)#vrrp 1 priority 150
% Priority change will have no effect whilst interface is VRRP address owner
(This is what happens if you use real ip address as VRRP IP address, priority value has no effect)
2651xm-1(config-if)#vrrp 1 timers advertise msec 500
(Default hello timer is 1s, VRRP only allows me to configure hello timer)
2651xm-1(config-if)#vrrp 1 preempt
2651xm-1(config-if)#vrrp 1 ?
description Group specific description
ip Enable Virtual Router Redundancy Protocol (VRRP) for IP
preempt Enable preemption of lower priority Master
priority Priority of this VRRP group
shutdown Disable VRRP Configuration
timers Set the VRRP timers
track Event Tracking
(Cisco routers do support VRRP authentication as opposed to the new VRRP standards)
VRRP can only track objects unlike HSRP which can track link and objects.
2651xm-1(config)#track 1 interface fa0/0 line-protocol
2651xm-1(config-if)#vrrp 1 track 1 decrement 20
% tracking not supported on IP address owner
(Remember, I used real ip address, priority has no meaning)
2651xm-1#sh vrrp int fa0/0
FastEthernet0/0 – Group 1
State is Init
Virtual IP address is 172.16.1.1
Virtual MAC address is 0000.5e00.0101
Advertisement interval is 0.500 sec
Preemption enabled Priority is 255 (cfgd 150)
Master Router is 172.16.1.1 (local), priority is 255
Master Advertisement interval is 1.000 sec
Master Down interval is 1.503 sec