DELL S50V User Manual

Virtual Router Redundancy Protocol (VRRP) | 1127

IPv4 

 is available on platforms: 

c

 

e

 

s

IPv6 VRRP (VRRP version 3) is available on platforms: 

c e s

This chapter covers the following information:

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Virtual Router Redundancy Protocol (VRRP) is designed to eliminate a single point of failure in a 
statically routed network.

VRRP specifies a MASTER router that owns the next hop IP and MAC address for end stations on a LAN. 
The MASTER router is chosen from the virtual routers by an election process and forwards packets sent to 
the next hop IP address. If the MASTER router fails, VRRP begins the election process to choose a new 
MASTER router and that new MASTER continues routing traffic. 

VRRP uses the Virtual Router Identifier (VRID) to identify each virtual router configured The IP address 
of the MASTER router is used as the next hop address for all end stations on the LAN. The other routers 
represented by IP addresses are BACKUP routers. 

VRRP packets are transmitted with the virtual router MAC address as the source MAC address. The MAC 
address is in the following format: 00-00-5E-00-01-{VRID}. The first three octets are unchangeable. The 
next two octets (00-01) indicate the address block assigned to the VRRP protocol, and are unchangeable. 
The final octet changes depending on the VRRP Virtual Router Identifier and allows for up to 255 VRRP 
routers on a network.