From: Olivier Martin (omartin@xxxxxxxx)
Date: Fri Sep 14 2001 - 09:51:01 GMT-3
You would then have to put a floating static route on both sides.. Makes it
harder to scale and maintain. I would suggest you try a setup similar to
this :
interface Serial0/0
ip address whatever..
ip ospf cost 200
interface BRI0/0
ip addres whatever..
dialer map ..
dialer-group 2
ip ospf cost 10000
ip ospf demand-circuit
dialer-list 2 protocol ip list 100
access-list 100 deny ip ospf any any
access-list 100 permit ip any any
If the costs associated with the route (set with the ip ospf cost) is higher
than the one used on the serial line, no traffic should take this link,
except the routing advertisements, that cannot bring up the link because of
the access-list 100. But as I'm writing this, I think that this might just
be a question of ospf cost. Because if you remove the demand-circuit, LSA
will begin to be exchanged. You should put the demand-circuit on both sides
of the circuit. How about using the snapshot routing ? I'm a bit confused
myself on all these techniques..
Olivier
-----Message d'origine-----
De : Armon Richardson [mailto:ar28@lucent.com]
Envoyi : 14 septembre, 2001 08:40
@ : Fear, Russell H; ccielab@groupstudy.com
Objet : RE: Help!
why not remove the demand circuit, and just use a floating static. Then deny
any traffic that you don't want to bring up the link. (deny ospf any any).
thanks,
" Where the willingness is great, the difficulties cannot be great "
Armon Richardson
CNE, MCSE, CCNP, CCDP
Network Systems Engineer
Lucent Worldwide Services
pager 1-800-467-1467
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Fear, Russell H
Sent: Friday, September 14, 2001 5:38 AM
To: 'ccielab@groupstudy.com'
Subject: Help!
Can anyone in the group help me with thhe following problem.
I have an ospf router which is redistributing igrp into area 0. It also has
an isdn back-up as a demand circuit so that if the main connection to area 0
dies, the isn kicks in and routes are still available. The problem is that
the LSAs caused by the re-distribution bring up the link continually. If I
block these, I block routing updates. I cant make the area a stub or an nssa
because it is area 0 and has two other areas hanging off it.
Am I missing something obvious ? It's been driving me mad. Help please .
Russell
* 700 2201 Internal
* +44 ( 0 ) 870 238 2201 External
* russell.fear@capgemini.co.uk
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