Avaya Configuring Interface and Router Redundancy Uživatelský manuál stáhnout pdf (Strana 35)

Router Redundancy Overview

114079 Rev. B 2-7

With a divisor value of 10, and a retries value of 4, the router takes 2 seconds to

detect 4 missed BOFLs and initiate a role change. The entire role change

procedure takes about 3 seconds.

You may want to set the retries to a value higher than 4 depending on the nature of

your network. If your network typically carries trafﬁc in bursts, setting the retries

value to 4 could trigger frequent, unnecessary role-switching.

Refer to Appendix D for parameter descriptions and instructions for using Site

Manager to edit these parameters.

Resource Availability

A router is functioning normally if it can reach the resources -- servers, printers,

and other devices -- with which you conﬁgure it to communicate. If a primary

router in a redundancy group cannot reach its resources, it changes out of the

primary role. Resources are determined by IP address, so all resources must be

running TCP/IP.

Bay Networks redundancy software includes several parameters that allow you to

control how often and how many times a router attempts to ping its resources

(refer to Chapter 5).

Requirements

Router redundancy has the following requirements:

• Router redundancy is a Bay Networks proprietary protocol. All routers

running router redundancy must be Bay Networks routers.

• Interfaces that you conﬁgure for router redundancy must be on networks with

no other routers that require route advertisements on that segment of the

network.

• All members of a router redundancy group must have exactly the same

conﬁguration for all redundant interfaces except for Member ID, Priority, and

Resources.

• A router can be a member of only one router redundancy group.

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Avaya Configuring Interface and Router Redundancy Uživatelský manuál Strana 35