Backup Interface

From: Stephens, Paul [Prof.Serv] (Paul.Andrew.Stephens@xxxxxxxxxx)
Date: Thu Aug 17 2000 - 10:32:30 GMT-3


   
Hi guys

I've just come across a really strange situation and I don't know if it's a
bug or not. this is the layout below

area 3-------- r 5-------area 1--------r2
                | |
                | |
                | area 0
                | |
                | |
                isdn--------area 2----- r3

I don't know how well the above diagram looks to you all but I'll try to
explain whats happening. Ospf is working fine I have all the relevant
virtual inks to maintain connectivity, i.e r2 -r5 across area 1 and r3 - r5
across area 2, also i have ip ospf demand circuit on the isdn. Now the
problem;

If I use the backup interface command on r5 for area 1 it never brings the
isdn up on a failure with the interface on r5 connected to area 1. if i
don't use backup interface it works fine.

so my question is do I just rely on ospf to bring the isdn up and not use
backup interface at all ??? or am i asking a stupid question !!!!

As you have probably gathered from all my questions recently that I am in
the lab preparing for my next attempt

cheers

Paul Stephens

UK INI Network Consultant
Networks and Systems Integration Services
Compaq Computer Ltd
paul.andrew.stephens@compaq.com

Tel: (Mobile) +44 (0)7818 457948

www.compaq.co.uk



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