[98659] in North American Network Operators' Group
Re: inter-domain link recovery
daemon@ATHENA.MIT.EDU (Randy Bush)
Wed Aug 15 03:00:33 2007
Date: Tue, 14 Aug 2007 20:11:09 -1000
From: Randy Bush <randy@psg.com>
To: Chengchen Hu <huc@ieee.org>
CC: nanog <nanog@merit.edu>
In-Reply-To: <200708151206342658318@ieee.org>
Errors-To: owner-nanog@merit.edu
without specific data, everything is guesswork, folklore, and guesswork.
did i say guesswork.
the two biggest causes of long bgp convergence are policy and damping.
policy is hidden and you can only guess and infer. if you are lucky and
have records from folk near the problem (not the incident, but the folk
who can not see it) damping can be seen in places like route views and ris.
can you give specific data? e.g asn42 could not see prefix 666.42/16
being announced by asn96 2007.03.24 at 19:00 gmt.
randy
