BGP Experiment

Job Snijders job at
Thu Dec 20 17:43:25 UTC 2018

Dear Italo,

Thanks for giving the community a heads-up on your plan! I think your
announcement like these are the best anyone can do when trying legal
but new BGP path attributes.

I'll forward this message to other NOGs and make sure that our NOC
adds it to their calendar.

Kind regards,


On Thu, Dec 20, 2018 at 6:39 PM Italo Cunha <cunha at> wrote:
> We would like to inform you of an experiment to evaluate alternatives
> for speeding up adoption of BGP route origin validation (research
> paper with details [A]).
> Our plan is to announce prefix with a valid
> standards-compliant unassigned BGP attribute from routers operated by
> the PEERING testbed [B, C]. The attribute will have flags 0xe0
> (optional transitive [rfc4271, S4.3]), type 0xff (reserved for
> development), and size 0x20 (256bits).
> Our collaborators recently ran an equivalent experiment with no
> complaints or known issues [A], and so we do not anticipate any
> arising. Back in 2010, an experiment using unassigned attributes by
> RIPE and Duke University caused disruption in Internet routing due to
> a bug in Cisco routers [D, CVE-2010-3035]. Since then, this and other
> similar bugs have been patched [e.g., CVE-2013-6051], and new BGP
> attributes have been assigned (BGPsec-path) and adopted (large
> communities). We have successfully tested propagation of the
> announcements on Cisco IOS-based routers running versions 12.2(33)SRA
> and 15.3(1)S, Quagga and 1.1.1, as well as BIRD 1.4.5 and
> 1.6.3.
> We plan to announce from 8 PEERING locations for a
> predefined period of 15 minutes starting 14:30 GMT, from Monday to
> Thursday, between the 7th and 22nd of January, 2019 (full schedule and
> locations [E]). We will stop the experiment immediately in case any
> issues arise.
> Although we do not expect the experiment to cause disruption, we
> welcome feedback on its safety and especially on how to make it safer.
> We can be reached at disco-experiment at
> Amir Herzberg, University of Connecticut
> Ethan Katz-Bassett, Columbia University
> Haya Shulman, Fraunhofer SIT
> Ítalo Cunha, Universidade Federal de Minas Gerais
> Michael Schapira, Hebrew University of Jerusalem
> Tomas Hlavacek, Fraunhofer SIT
> Yossi Gilad, MIT
> [A]
> [B]
> [C]
> [D]
> [E]

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