[86283] in North American Network Operators' Group
Re: oh k can you see
daemon@ATHENA.MIT.EDU (Joe Abley)
Mon Oct 31 19:15:45 2005
In-Reply-To: <Pine.SOC.4.61.0510311445160.25666@paixhost.pch.net>
Cc: Joe Maimon <jmaimon@ttec.com>, Randy Bush <randy@psg.com>,
nanog <nanog@merit.edu>
From: Joe Abley <jabley@isc.org>
Date: Mon, 31 Oct 2005 19:15:06 -0500
To: Bill Woodcock <woody@pch.net>
Errors-To: owner-nanog@merit.edu
On 31-Oct-2005, at 17:49, Bill Woodcock wrote:
> Which leaves the question of why F, and now K, appear to be trying
> to do
> it.
F's covering prefix, 192.5.5.0/24, is advertised to peers of F-root
local nodes with NO_EXPORT. 192.5.5.0/24 is advertised to peers of AS
3557 without NO_EXPORT.
A shorter prefix, 192.5.4.0/23, is also advertised without NO_EXPORT
from AS 3557.
In the cases where local nodes of F advertise 192.5.5.0/24 with
NO_EXPORT to ASes which also provide transit for 3557, we have taken
care to ensure that local policy in those ASes causes the 3557 route
(a customer route) always to be selected in preference to that
received from the local node (a peer route). In these cases the local
node provides local backup service.
A description of F's deployment strategy can be found in <http://
www.isc.org/pubs/tn/isc-tn-2003-1.html>.
Joe
