Avaya Configuring Interface and Router Redundancy Instrukcja Użytkownika Pobierz pdf (Strona 29)

114079 Rev. B 2-1

Chapter 2

Router Redundancy Overview

Router redundancy protects a network from the irrecoverable failure 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. It includes conﬁgurable bidding timers and

timeout periods. These values 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 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 Instrukcja Użytkownika Strona 29