From: Paul Crist (pcrist@xxxxxxxxxxx)
Date: Fri Aug 17 2001 - 11:39:55 GMT-3
The example that Russell gave does actually work if you wish to filter and
only get the /22 address. I have used it with distribute list in on inbound
rip. Let's clear the air and pose this question:
You are receiving the following networks on your router, 194.201.48.0,
194.201.49.0, 194.201.50.0 and 194.201.51.0. Given these networks your
supervior wants you to configure your router so only one routing entry, a
summary of the networks is in your router. If you fail to do so you will be
terminated (AKA you won't make it to day 2). Will the example you gave:
access-list 103 permit ip 194.201.48.0 0.0.3.255 any
Do this?
Paul
----- Original Message -----
From: "Jason Gardiner" <gardiner@sprint.net>
To: "Fear, Russell H" <Russell.Fear@capgemini.co.uk>
Cc: <ccielab@groupstudy.com>
Sent: Friday, August 17, 2001 9:35 AM
Subject: Re: BGP filter
> Okay,
>
> First off, is there an international version of IOS? I've never seen
> "neighbour" but rather "neighbor" :)
>
> I've never setup a dist list with an extended access-list , but it
> appears that you are permitting from 194.201.48.0 with a mask of
> 255.255.255.255 to host 255.255.252.0 with a mask of 255.255.255.255.
>
> Try this:
>
> access-list 103 permit ip 194.201.48.0 0.0.3.255 any
>
>
>
> "Fear, Russell H" wrote:
> >
> > Can someone in the group tell me where I'm going wrong here ?
> >
> > I have networks 194.201.48.0/24 - 194.201.51.0/24 plus the aggregate of
> > 194.201.48.0/22 being advertised by a BGP speaker. I am trying various
kinds
> > of filters and the one I cannot get to work is the following.
> >
> > neighbour 172.168.16.1 distribute-list 103 out
> >
> > access-list 103 permit ip host 194.201.48.0 host 255.255.252.0
> >
> > The aggregate does not even reach the BGP table in the second
router.I've
> > checked the syntax and I think that this should let the aggregate only
> > through.
> >
> > Any obvious mistakes ?
> >
> > Russell
> >
> >
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> --
> Thanks,
>
> Jason Gardiner
> Supervisor, Engineering Services
> Sprint E|Solutions
>
> "You can swim all day in the Sea of Knowledge and
> still come out completely dry. Most people do."
>
> - Norton Juster
> **Please read:http://www.groupstudy.com/list/posting.html
**Please read:http://www.groupstudy.com/list/posting.html
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