mailing list archives
RE: bgp update destroying transit on redback routers ?
From: Jeff Tantsura <jeff.tantsura () ericsson com>
Date: Thu, 1 Dec 2011 16:56:43 -0500
Let me take it over from now on, I'm the IP Routing/MPLS Product Manager at Ericsson responsible for all routing
There's nothing wrong in checking ASN in AGGREGATOR, we don't really want see ASN 0 anywhere, that's how
draft-wkumari-idr-as0 (draft-ietf-idr-as0-00) came into the worlds.
To my knowledge - the only vendor which allows changing ASN in AGGREGATOR is Juniper, see "no-aggregator-id", in the
past I've tried to talk to Yakov about it, without any results though.
So for those who have it configured - please rethink whether you really need it.
As for SEOS - understanding that this badly affects our customers and not having draft-ietf-idr-error-handling fully
implemented yet, we will temporarily disable this check in our code.
Patch will be made available.
Please contact me for any further clarifications.
P.S. Warren has recently included AGGREGATOR in the draft, please see
This document specifies that a BGP speaker MUST NOT originate or
propagate a route with an AS number of zero. If a BGP speaker
receives a route which has an AS number of zero in the AS_PATH (or
AS4_PATH) attribute, it SHOULD be logged and treated as a WITHDRAW.
This same behavior applies to routes containing zero as the
Aggregator or AS4 Aggregator.
Re: bgp update destroying transit on redback routers ? Olivier Benghozi (Dec 01)
RE: bgp update destroying transit on redback routers ? Jeff Tantsura (Dec 01)
- Re: bgp update destroying transit on redback routers ?, (continued)