[173757] in North American Network Operators' Group
Re: question about bgp incremental updates
daemon@ATHENA.MIT.EDU (arbor.net)
Mon Aug 4 04:54:09 2014
X-Original-To: nanog@nanog.org
From: "arbor.net" <rdobbins@arbor.net>
In-Reply-To: <53DEF010.8010601@gmail.com>
Date: Mon, 4 Aug 2014 15:53:59 +0700
To: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
On Aug 4, 2014, at 9:29 AM, Song Li <refresh.lsong@gmail.com> wrote:
> According to this principle, if an AS suddenly announced a lot of =
updates (as below), can it be regarded as an anomaly such as BGP session =
reset?
Yes. It's wise to monitor BGP announcements received from peers, and to =
investigate when large numbers of announcements or withdrawals take =
place simultaneously.
> I wish to know if there are other reasons can result in this anomaly.
Human error, deliberate disaggregation for traffic-engineering purposes, =
accidental or deliberate hijacking, turning up new peering links, et. =
al. can result in sudden flurries of route announcements/withdrawals.
----------------------------------------------------------------------
Roland Dobbins <rdobbins@arbor.net> // <http://www.arbornetworks.com>
Equo ne credite, Teucri.
-- Laoco=F6n
