Virtual Router Redundancy Protocol (VRRP) for IPv4 is defined in IETF RFC 3768, Virtual Router Redundancy Protocol. VRRP describes a method of implementing a redundant IP interface shared between two or more routers on a common LAN segment, allowing a group of routers to function as one virtual router. When this IP interface is specified as a default gateway on hosts directly attached to this LAN, the routers sharing the IP interface prevent a single point of failure by limiting access to this gateway address. For more information about the use of VRRP, refer to the 7210 SAS-D, Dxp, K 2F1C2T, K 2F6C4T, K 3SFP+ 8C Router Configuration Guide.
VRRP is supported for VRRP IPv4 interfaces. It is not supported for IPv6 interfaces in network or access-uplink mode.
Only one VRRP instance for each IP interface is supported on the 7210 SAS-K 2F6C4T and 7210 SAS-K 3SFP+ 8C.