[93433] in North American Network Operators' Group
Re: problem with BGP or I am an Idiot
daemon@ATHENA.MIT.EDU (Stephen Wilcox)
Fri Nov 17 10:58:08 2006
Date: Fri, 17 Nov 2006 15:56:53 +0000
From: Stephen Wilcox <steve@telecomplete.co.uk>
To: Philip Lavine <source_route@yahoo.com>
Cc: nanog <nanog@merit.edu>
In-Reply-To: <20061117144411.69755.qmail@web30808.mail.mud.yahoo.com>
Errors-To: owner-nanog@merit.edu
On Fri, Nov 17, 2006 at 06:44:11AM -0800, Philip Lavine wrote:
>
> To all,
>
> Probabaly the the latter; however here is the situation. I am advertising a rte 1.1.1.1 via BGP to the Internet via ISP_A via my location in NJ. At my other location in CA where I am advertising another rte 2.2.2.2 via BGP to the Internet via the same ISP_A. I am using the same AS for both routes.
>
> For some reason on my rtr advertising the 2.2.2.2 rte I am unable to see the 1.1.1.1 rte "% Network not in table". I know 1.1.1.1 rte is valid it shows up in looking glass and ISP_A has it on the peer 2.2.2.2 recevies full Internet rtes from. Further verification: I add a static rte on 2.2.2.2 rtr to 1.1.1.1 and its routable???
>
> How is this possible? I have the following filters but I removed them and it seems to not make a diff.
> OUTBOUND - ip as-path access-list 1 permit ^$
> ip as-path access-list 1 deny .*
> INBOUND - ip as-path access-list 2 permit .*
you will not accept a route with your AS in teh path
you can override it (on cisco) with allow-own-as
Steve
