From: Brian Dennis (brian@labforge.com)
Date: Wed Mar 05 2003 - 18:07:03 GMT-3
<From_CCO>
http://www.cisco.com/warp/public/104/9.html#Q9
Q: Can I use the distribute-list in/out command with OSPF to filter
routes?
A: OSPF routes can't be filtered from entering the OSPF database. The
distribute-list in command only filters routes from entering the routing
table, but it doesn't prevent link-state packets from being propagated.
The command distribute-list out works only on the routes being
redistributed by the autonomous system boundary routers (ASBRs) into
OSPF. It can be applied to external type 2 and external type 1 routes,
but not to intra-area and inter-area routes.
</From_CCO>
If you are able to filter intra or inter area routes using a standard
distribute-list send us your configuration and a show version.
Brian Dennis, CCIE #2210 (R&S/ISP Dial/Security)
brian@labforge.com
http://www.labforge.com
-----Original Message-----
From: Efrem.Coley@triaton-na.com [mailto:Efrem.Coley@triaton-na.com]
Sent: Wednesday, March 05, 2003 12:58 PM
To: brian@labforge.com; dannyandaluz@comcast.net; ccielab@groupstudy.com
Subject: RE: Crazy Access-List question
I tried this scenario. When I tried only allowing even with the
dist-list out under ospf everything looked the way it should. Only even
routes appeared in the rest of the network beyond the filtering router.
When I try to filter even networks, (the exact opposite of what the
requirement is), why would it not work with the dist-list out under
ospf?
Efrem
-----Original Message-----
From: Brian Dennis [mailto:brian@labforge.com]
Sent: Wednesday, March 05, 2003 3:22 PM
To: 'Danny Andaluz andaluz'; ccielab@groupstudy.com
Subject: RE: Crazy Access-List question
Danny,
Your problem is that the "distribute-list <acl> out" command doesn't
effect OSPF intra or inter area routes.
Brian Dennis, CCIE #2210 (R&S/ISP Dial/Security)
brian@labforge.com
http://www.labforge.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Danny Andaluz andaluz
Sent: Wednesday, March 05, 2003 11:31 AM
To: ccielab@groupstudy.com
Subject: Crazy Access-List question
I'm trying to figure something out here.
I know how to allow even networks and deny odd networks:
router ospf 3
network x.x.x.x
dist-list 1 out
access-list 1 deny 10.10.1.0 0.0.254.255
access-list 1 permit any
this would only allow 10.10.2.0, 4.0, 6.0 ,etc... to be advertised.
How would you allow only odd networks and deny even networks? I have
tried many different ways and nothing works.
TIA
Danny
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