VRRP (Virtual Router Redundancy Protocol) defined in RFC 2338 is a non-proprietary redundancy protocol like the Cisco's proprietary HSRP. It can be used on a multi-vendor environment. The operation of VRRP and HSRP is similar.
The differences are:
1. VRRP router knows Master router and Backup Router (as Active and Standby in HSRP). The Master router will have the virtual ip address, so that the virtual ip address is the router's real address.
2. VRRP advertisements are multicast to 224.0.0.18
3. The MAC address of VRRP virtual router is 0000.5e00.01XX, where XX is the number of the router group in hexadecimal
4. The "preempt" command in HSRP is set as default on VRRP router so that the backup router will be the master router if the priority of the routers changes.
5. VRRP has a feature called Object Tracking which is similar to HSRP Interface Tracking
-- 23 November 2010 --
The differences are:
1. VRRP router knows Master router and Backup Router (as Active and Standby in HSRP). The Master router will have the virtual ip address, so that the virtual ip address is the router's real address.
2. VRRP advertisements are multicast to 224.0.0.18
3. The MAC address of VRRP virtual router is 0000.5e00.01XX, where XX is the number of the router group in hexadecimal
4. The "preempt" command in HSRP is set as default on VRRP router so that the backup router will be the master router if the priority of the routers changes.
5. VRRP has a feature called Object Tracking which is similar to HSRP Interface Tracking
-- 23 November 2010 --
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