VRRP support for IES IP interfaces in network mode

Note: VRRP for IPv4 is supported for IES IPv4 interfaces in network mode only.

The Virtual Router Redundancy Protocol (VRRP) for IPv4 is defined in the 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 use of VRRP, see the 7210 SAS-Mxp, R6, R12, S, Sx, T Router Configuration Guide.