Dear grow and idr members,
Recent talks at network operators group meetings, as well as proposals
at the IETF, acknowledge the need of operators to filter overlapping
prefixes (be it to reduce their routing table size or their bill).
This document lists various cases where a filtering of overlapping
prefixes performed within one AS triggers a violation of the policies
that other ASes implement in their network. The simplicity of those
cases motivated us to warn operators for the risks associated with such
filtering, as they seem likely to happen if overlapping prefix filtering
is becoming an habit rather than a punctual, exceptionally applied measure.
This draft acknowledges the motivation for such filtering, and thus
tries to foster attention on the potential risks from ISPs and vendors
applying, planning to apply, or designing routing features to facilitate
such filtering.
The draft covers cases where the filtering is performed locally by an
AS, as well as cases where the filtering is triggered remotely through
the use of BGP communities commonly defined for that purpose.
We would like to adapt this initial draft based on the comments and
feedback received from you, before presenting it at the next IETF meeting.
Regards,
Pierre Francois.
-------- Original Message --------
Subject: I-D Action: draft-cardona-filtering-threats-00.txt
Date: Tue, 25 Sep 2012 12:21:46 -0700
From: [email protected]
Reply-To: [email protected]
To: [email protected]
A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Making BGP filtering an habit: Impact on policies
Author(s) : Pierre Francois
Camilo Cardona
Filename : draft-cardona-filtering-threats-00.txt
Pages : 17
Date : 2012-09-25
Abstract:
This draft describes potential threats to the Internet routing
policies of an autonomous system due to filtering of more specific
BGP prefixes by its neighboring domains.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-cardona-filtering-threats
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-cardona-filtering-threats-00
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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