15.1 Description
The Virtual Router Redundancy Protocol (VRRP) is hot standby functionality for securing communication paths for terminals via another router on the same Ethernet LAN if the original router fails.
By using VRRP, you can create a virtual router that is a representation of multiple routers working as a group on the same Ethernet LAN. When a terminal specifies this virtual router as its default gateway, if the original router fails, the terminal can continue communication without any awareness that it is actually using another router.
A virtual router has a virtual router identifier (VRID) selected from a range from 1 to 255. The physical routers that participate in a virtual router on the same Ethernet LAN use the same virtual router identifier. Among such physical routers, one router operates as the master router and routes packets. The other router or routers, called backup routers, wait in hot standby status and do not route packets.
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