Avaya Configuring Interface and Router Redundancy Manuel d'utilisateur télécharger pdf (Page 27)

114079 Rev. A 2-1

Chapter 2

Router Redundancy Overview

Router redundancy protects a network from irrecoverable failures of an entire

router. You conﬁgure routers to be members of a router redundancy group. The

group includes a primary router that performs normal routing and bridging

services, and one or more secondary routers that take over if the primary router

fails.

Primary Router

Bay Networks router redundancy software allows you to decide which router has

priority to be the primary router, and includes conﬁgurable bidding timers and

timeout periods that determine how and when a router in a redundancy group

changes roles from secondary to primary.

Dedicated Secondary Router

Bay Networks recommends that you conﬁgure router redundancy so that a

secondary router has no function other than to serve as a backup. A router so

conﬁgured is a dedicated secondary router.

You can conﬁgure a redundant router to carry other trafﬁc, unrelated to that of its

redundancy group. Be aware, however, that if a secondary router becomes the

primary router in a redundancy group, it reboots and stops any other data transfer

it was performing. When you conﬁgure a router as a member of a router

redundancy group, its role in that group takes precedence over any other functions

you assign it.

Note: You can conﬁgure multiple router redundancy groups on the same

network.

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Avaya Configuring Interface and Router Redundancy Manuel d'utilisateur Page 27