[12219] in North American Network Operators' Group
Re: gated.conf
daemon@ATHENA.MIT.EDU (Neil J. McRae)
Wed Sep 10 04:01:52 1997
To: Joe Shaw <jshaw@insync.net>
cc: nanog@merit.edu, neil@domino.org
In-reply-to: Your message of "Tue, 09 Sep 1997 18:02:57 CDT."
<Pine.GSO.3.96.970909175455.28722B-100000@vellocet.insync.net>
From: "Neil J. McRae" <neil@domino.org>
Reply-To: "Neil J. McRae" <neil@domino.org>
Date: Wed, 10 Sep 1997 08:50:45 +0100
On Tue, 9 Sep 1997 18:02:57 -0500 (CDT)
Joe Shaw <jshaw@insync.net> wrote:
>
> Ok, thanks to all the people who helped me out with my gated.conf
> problems. Although not exactly what I needed to know at the time, it did
> teach me a lot about what I was trying to do, and the rest came a little
> easier. One problem I'm having, is I've got several regular expression
> statemenst I'm trying to use to filter my routes to one of my upstream
> carriers. I had a t1 to this upstream to test out how much we liked their
> network, and now we're moving up to oc-3 to them. What we've done is
> purchased a GRF for this link, and run the ATM into it. I'd like to
> duplicate the as-path access-list for the oc-3. The Cisco config
> follows.
>
> ip as-path access-list 31 deny _3831_
> ip as-path access-list 31 deny _701_
> ip as-path access-list 31 deny _114_
> ip as-path access-list 31 deny _6302_
> ip as-path access-list 31 deny ^4259 .*
> ip as-path access-list 31 deny ^3817 .*
> ip as-path access-list 31 permit .*
>
> These do the job on my network, and I'm happy with them.
> On the GRF, I've done this to try and duplicate them:
>
OK Change this to:
export proto bgp as 3831 {
proto bgp aspath .* origin any { all; };
proto bgp aspath 3831 origin any restrict;
proto bgp aspath 701 origin any restrict;
proto bgp aspath 6302 origin any restrict;
proto bgp aspath 4259 * origin any restrict;
proto bgp aspath 3817 * origin any restrict;
}
I think this is correct, but if it isn't working I'd
move the the top clause to the bottom and put the others above [order is
important, but the order isn't _yet_ documented] You should have a look
at filter declations such as this below:
define filter "AS-3831"
{
proto bgp aspath .* origin any { all; };
proto bgp aspath 3831 origin any restrict;
proto bgp aspath 701 origin any restrict;
proto bgp aspath 6302 origin any restrict;
proto bgp aspath 4259 * origin any restrict;
proto bgp aspath 3817 * origin any restrict;
};
Then do:
export proto bgp as 6453 "AS-3831";
Note that I've not tried doing the above, but it should work, it means
you can %include filters and makes your gated.conf files much easier to
read.
Hope this helps,
Neil
--
Neil J. McRae. Alive and Kicking. Domino: In the glow of the night.
neil@DOMINO.ORG NetBSD/sparc: 100% SpF (Solaris protection Factor)
Free the daemon in your <A HREF="http://www.NetBSD.ORG/">computer!</A>
