[100845] in North American Network Operators' Group
BGP community attribute taxonomy
daemon@ATHENA.MIT.EDU (Benoit Donnet)
Thu Nov 15 05:07:08 2007
To: nanog@nanog.org
From: Benoit Donnet <benoit.donnet@uclouvain.be>
Date: Thu, 15 Nov 2007 11:05:55 +0100
X-SGSI-From: benoit.donnet@uclouvain.be
Errors-To: owner-nanog@merit.edu
Dear Nanog community,
During the past years, we have seen an increasing usage of the BGP =20
community attribute. For instance, in a recent BGP table dump from =20
routeviews, 99% of the routes stored by the router carries BGP =20
communities.
In this context, we are currently working on a BGP community =20
taxonomy, i.e., we want to classify and document communities =20
according to their usage. We describe our taxonomy on the following =20
url: http://inl.info.ucl.ac.be/communities
Based on this taxonomy, we tried to collect as much as possible =20
information on BGP communities. This was a daunting task as we =20
mainly relied on public database, such as whois server and ISP web =20
sites.
Our current database of classified BGP communities currently contains =20=
more than 12,000 entries.
When running our database and taxonomy on recent BGP table dumps from =20=
RouteViews and RIPE (last dump from September 2007), we were only =20
able to classify, on average, 20% of the encountered communities.
Based on this result, we ranked the unclassified BGP communities. =20
Here is the top 10 of most seen ASes using uncommented communities:
AS19151
AS3549
AS3549
AS2914
AS7473
AS286
AS3292
AS13237
AS6667
AS34225
You can find the top 100 on the following url: http://=20
www.info.ucl.ac.be/~donnet/communities.html It gives the AS number =20
as well as, for each AS, the various unclassified communities and =20
their total frequency (i.e., the number of times the AS with =20
unrecognized communities is encountered in table dumps).
If you have any documentation regarding these communities, it would =20
be very helpful if you can send us back this information. The =20
easiest way for you is probably to reply to this email and attach the =20=
information (text, PDF, doc file, ...).
When our database will be enough representative of the used BGP =20
communities, we will made it freely available. We will also propose =20
a way for updating (adding or removing) BGP communities information =20
in our database.
Thanks in advance.
Best regards.
Dr. Benoit Donnet & Prof. Olivier Bonaventure
--
Dr. Benoit Donnet
Universit=E9 Catholique de Louvain (UCL)
Facult=E9 des Sciences Appliqu=E9es - D=E9partement d'Ing=E9nierie =20
Informatique (INGI)
Place Sainte Barbe, 2
1348 Louvain-la-Neuve
Belgium
Phone: +32 10 47 87 18
Home page: http://inl.info.ucl.ac.be/donnet
