User's Manual
WiFiBroadbandBG
BDE761AM-001 User Manual 93
3.2.4 Redundancy
3.2.4.1 VRRP
The Virtual Router Redundancy Protocol (VRRP) is a computer networking protocol
providing device redundancy. It allows a backup router or switch to automatically take
over if the primary (master) router or switch fails. This increases the availability and
reliability of routing paths via automatic default gateway selections on an IP network.
The protocol achieves this by creation of virtual routers, which are an abstract
representation of multiple routers, i.e. master and backup routers, acting as a group.
The default gateway of a participating host is assigned to the virtual router instead of
a physical router. If the physical router that is routing packets on behalf of the virtual
router fails, another physical router is selected to automatically replace it. The
physical router that is forwarding packets at any given time is called the master router.