HSRP, VRRP, or GLBP. The big question is...which one? ...and why? Well, me being a Cisco
spud, I immediately gravitated to HSRP since that's all I know very
well. But before I left, I decided to check out the competition, here's
what I found:
Cisco Hot-Standby Router Protocol (HSRP):
Router1(config-if)#vrrp 1 ip 10.1.6.1 (they obviously used a real IP address)
Router1(config-if)#vrrp 1 preempt
Router1(config-if)#vrrp 1 priority 100
Router2(config-if)#vrrp 1 ip 10.1.6.1
Router2(config-if)#vrrp 1 preempt
Router2(config-if)#vrrp 1 priority 120
Cisco Hot-Standby Router Protocol (HSRP):
- Created by Cisco, for Cisco in 1994
- Uses a default hello timer of 3 seconds with a hold timer of 10 seconds
- Created by the IETF in 1999
- Works between multiple vendors
- Has faster timers than HSRP by default - hello of 1 second, hold timer of 3 seconds
- Created by Cisco, for Cisco in 2005
- Identical features to HSRP, but allows an active-active connection that adds load-balancing features
Router1(config-if)#vrrp 1 ip 10.1.6.1 (they obviously used a real IP address)
Router1(config-if)#vrrp 1 preempt
Router1(config-if)#vrrp 1 priority 100
Router2(config-if)#vrrp 1 ip 10.1.6.1
Router2(config-if)#vrrp 1 preempt
Router2(config-if)#vrrp 1 priority 120
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