Re: [Idr] Unknown Attributes seen in the wild

Job Snijders <job@ntt.net> Sun, 30 October 2016 18:22 UTC

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Date: Sun, 30 Oct 2016 19:22:34 +0100
From: Job Snijders <job@ntt.net>
To: Robert Raszuk <robert@raszuk.net>
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Subject: Re: [Idr] Unknown Attributes seen in the wild
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On Sun, Oct 30, 2016 at 07:05:49PM +0100, Robert Raszuk wrote:
> > Perhaps this is some internal SDN thing that leaked publicly ?
> 
> You are right ... attribute 243 is Contrail's OriginVnPath attribute
> useful for more complex service chaining scenarios.
> 
> https://github.com/Juniper/contrail-controller/blob/82cdb6afee49b39e54364f18be8eeca725dd76f4/src/bgp/bgp_attr_base.h

So this is a case of path attribute squatting, with code deployed in the wild?

> With that let's also not forget about attributes 241 and 242 used for
> multicast edge replication. The work on draft describing those last two
> temporarily allocated attribute codes is currently being resubmitted. The
> good news is that they should not be leaked as they are to be send in their
> dedicated SAFIs so unless peer exchanges right capabilities they should be
> quite contained.
> 
> https://github.com/Juniper/contrail-controller/blob/82cdb6afee49b39e54364f18be8eeca725dd76f4/src/net/bgp_af.h

Would this be a (partial?) implementation of
https://tools.ietf.org/html/draft-marques-l3vpn-mcast-edge-01 or is
there another draft?

Kind regards,

Job