Avaya Configuring VRRP Services Manuel d'utilisateur télécharger pdf (Page 13)

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Chapter 1

VRRP Concepts

This chapter describes VRRP concepts you need to know before you begin

configuring a VRRP router.

About VRRP

The Virtual Router Redundancy Protocol (VRRP), which runs over IP, enables

you to configure router redundancy to protect a network from the irrecoverable

failure of one or more IP interfaces. VRRP manages a virtual router, which is a

software-defined object that corresponds to an IP address on a LAN segment. A

virtual router typically exists on multiple routers running VRRP (known as VRRP

routers). One of the VRRP routers acts as the master virtual router for an IP

address, while other VRRP routers act as backup virtual routers.

You identify each virtual router using a virtual router identifier (VRID) and a

virtual router IP address. All VRRP routers on a LAN segment must have the

same VRID and IP address. You can, however, use a VRID on more than one LAN

as long as you pair it with a different virtual router IP address. The scope of each

virtual router is restricted to a single LAN.

Topic Page

About VRRP 1-1

Master Virtual Router 1-2

Backup Virtual Routers 1-2

Critical IP Interfaces 1-2

VRRP Messaging 1-2

Planning Your Network 1-3

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Avaya Configuring VRRP Services Manuel d'utilisateur Page 13