[93434] in North American Network Operators' Group
Re: problem with BGP or I am an Idiot
daemon@ATHENA.MIT.EDU (Jay Hennigan)
Fri Nov 17 12:28:04 2006
Date: Fri, 17 Nov 2006 09:27:53 -0800
From: Jay Hennigan <jay@west.net>
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
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.
Don't do that then.
> 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???
The reason is that a BGP router won't accept a route containing its own
AS from an external peer.
You can add a static route on both routers to the other network with the
gateway of your ISP. A floating static default may also work. Or get a
different AS for the other end.
--
Jay Hennigan - CCIE #7880 - Network Engineering - jay@impulse.net
Impulse Internet Service - http://www.impulse.net/
Your local telephone and internet company - 805 884-6323 - WB6RDV
