Avaya Configuring Interface and Router Redundancy Manuale Utente Scaricare il pdf (Pagina 61)

B-1

Appendix B

Router Redundancy Examples

This appendix contains three examples of router conﬁgurations that use router

redundancy.

Example 1: Two Routers at the Same Site

This example shows how router redundancy works in a conﬁguration with two

routers in the redundancy group, both in the same location. Figure

B-1 illustrates

two routers conﬁgured as a redundancy group in a Token Ring, Ethernet, or FDDI

network.

Figure B-1. Router Redundancy: Two Routers at the Same Site

Router Bootup

Upon router bootup, both members of the redundancy group are in the secondary

role. They bid to determine which of the routers will assume the primary role

(refer to Chapter 2). When the bidding time expires, the selected primary member

switches into the primary role.

Router A Router B

FDDI

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Avaya Configuring Interface and Router Redundancy Manuale Utente Pagina 61