[104016] in North American Network Operators' Group
Re: [Nanog] Cogent Router dropping packets
daemon@ATHENA.MIT.EDU (David Coulson)
Tue Apr 22 08:53:58 2008
Date: Tue, 22 Apr 2008 08:52:21 -0400
From: David Coulson <david@davidcoulson.net>
To: manolo <mhernand1@comcast.net>
In-Reply-To: <480DDD5B.1060903@comcast.net>
Cc: nanog@merit.edu, Joe Greco <jgreco@ns.sol.net>
Errors-To: nanog-bounces@nanog.org
manolo wrote:
> Well it had sounded like I was in the minority and should keep my mouth
> shut. But here goes. On several occasions the peer that would advertise
> our routes would drop and with that the peer with the full bgp tables
> would drop as well.
That doesn't sound like the problem has anything to do with their
multihop-eBGP configuration - It just appears that whatever you were
directly connected to was flaking out. If they had moved you to a
directly connected BGP session and it all worked, that would be one
argument, but you also moved from a junky 3550 or something to the GSR
in the process. I'd argue that if the switch could handle full tables
and you just had a single session, you would probably have experienced
the same issue.
I've ran with both direct and multihop with Cogent, and I honestly never
noticed any difference in stability. I hear what you're saying, and I
think you have a valid argument in some respects, but I just think the
BGP problem is a symptom, not a cause.
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