[87664] in North American Network Operators' Group
metric 0 vs 'no metric at all'
daemon@ATHENA.MIT.EDU (Alexander Koch)
Tue Jan 3 02:26:41 2006
Date: Tue, 3 Jan 2006 08:21:43 +0100
From: Alexander Koch <efraim@clues.de>
To: nanog@nanog.org
Errors-To: owner-nanog@merit.edu
Hiya,
I was wondering if someone had done any or some research on
this before... basically I am not sure with all the many
implementations of BGP and all the vendors if and what those
will do when they see a metric of 0 and no metric. I am not
an expert knowing the actual protocol's messages exchanged,
but I see some routes with nothing in the metric field on
the various show commands, and some have explicit '0' metric.
I do not trust all the BGP implementations around, and we
consider changing the default outbound, with MEDs of course
still available on request.
Alexander
