Avaya G430, Manual

Page: 474 / 696

Root level
command
Command Description
redistribute Redistribute routing information from other
protocols into OSPF
• Use in the Router RIP context to configure
route redistribution into RIP.
• Use in the Router OSPF context to
configure route redistribution into OSPF.
default-metric Configure the metric to be used in updates
that are redistributed from one routing
protocol to another
router rip Enable RIP and enter the router configuration
context
redistribute Redistribute routing information from other
protocols into RIP
default-metric Configure the metric to be used in updates
that are redistributed from one routing
protocol to another
VRRP
Virtual Router Redundancy Protocol (VRRP) is an IETF protocol designed to support
redundancy of routers on the LAN and load balancing of traffic. VRRP is open to host stations,
making it an ideal option when redundancy, load balancing, and ease of configuration are
required.
The concept underlying VRRP is that a router can back up other routers, in addition to
performing its primary routing functions. This redundancy is achieved by introducing the
concept of a virtual router. A virtual router is a routing entity associated with multiple physical
routers. One of the physical routers with which the virtual router is associated performs the
routing functions. This router is known as the master router. For each virtual router, VRRP
selects a master router. If the selected master router fails, another router is selected as master
router.
In VRRP, two or more physical routers can be associated with a virtual router, thus achieving
extreme reliability. In a VRRP environment, host stations interact with the virtual router. The
stations are not aware that this router is a virtual router, and are not affected when a new router
takes over the role of master router. Thus, VRRP is fully interoperable with any host station.
You can activate VRRP on an interface using a single command while allowing for the
necessary fine-tuning of the many VRRP parameters. For a detailed description of VRRP, see
VRRP standards and published literature.
The router
474 Administering Avaya G430 Branch Gateway October 2013
Comments? infodev@avaya.com