From: Earl Aboytes (earl@xxxxxxxxxxxx)
Date: Wed Jul 12 2000 - 13:58:52 GMT-3
The big deal with the VLSM/default route/IGRP/OSPF scenario is that you have
a class A or B in the main part of your network and in your IGRP domain. In
fact, it will most likely be the same class A or B network in both domains.
In your example you have an RFC 1918 10.0.0.0 network that has been variably
subnetted.
You need a classfull route advertised to your igrp router. If you have a
9.0.0.0 network, summarize that network and advertise it that way to your
IGRP domain. This assumes that the 9.0.0.0 network is NOT present in your
IGRP domain.
Most of the time in these labs there is a class C being advertised from
somewhere. You can use that as the default network. I do not have any
working configs but I have gotten this to work many times.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Earl Aboytes
Senior Technical Conultant
GTE Managed Solutions
805-381-8817
earl.aboytes@telops.gte.com
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Stephens, Paul [Prof.Serv]
Sent: Wednesday, July 12, 2000 4:42 AM
To: 'ccielab@groupstudy.com'
Subject: IGRP default-Network
Guys can you help me get my head round this. I know it has been asked loads
of time but I'm trying it in the lab and I can't get it to work.
Basically the config I have is as follows;
Eth-----R1 -------- R2 -------- R3----Eth
IGRP-----------------|----------------OSPF
All interface have a 10.0.0.0 address.
I'm trying to get R2 to supply a single default route to R1. I add the ip
default-network command on R2 but it doesn't get to R1.
If I put it on R1 it works but it also automatically adds a static route,
this I feel would not be allowed i n the lab if they say no static routes.
Some of the previous mails said that either side of R2 should be two
different classful addresses, i.e 9.0.0.0 one side and 10.0.0.0 the other
side. This is all very well and good but in the lab you may only get
classful address
How do I get it to work ? Any one got any sample configs ?
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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