Virtual Router Redundancy protocol
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It is standard based alternative to HSRP defined
in IETF standard RFC 2338.
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All VRRP operation is same as HSRP
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VRRP provides one redundant gateway address from
a group of routers. The active router is called the master router and another
is backup state. The master router will is the one with the highest router
priority in the VRRP group.
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VRRP group numbers range from 0 to 255; router
priorities range from 1 to 254 default is 100.
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The virtual router MAC address is of the form
0000.5e00.01xx , where xx is a VRRp group no.
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VRRP advertisement are sent at 1 second
intervals. Backup router optionally can learn the advertisement interval from
the master router.
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By default, all VRRP routers configured to
preempt the current master router if their priorities are greater.
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