Re: [Idr] Unknown Attributes seen in the wild

"Susan Hares" <shares@ndzh.com> Tue, 18 October 2016 17:50 UTC

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From: "Susan Hares" <shares@ndzh.com>
To: "'Peter Hessler'" <phessler@theapt.org>, <idr@ietf.org>
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Date: Tue, 18 Oct 2016 13:48:10 -0400
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Subject: Re: [Idr] Unknown Attributes seen in the wild
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Do we know which routers are sending path attributes with 20 or 21?  

Sue

-----Original Message-----
From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Peter Hessler
Sent: Tuesday, October 18, 2016 1:26 PM
To: idr@ietf.org
Subject: [Idr] Unknown Attributes seen in the wild

On 2016 Oct 18 (Tue) at 12:28:09 -0400 (-0400), Jeffrey Haas wrote:
:> On Oct 18, 2016, at 12:05 PM, Nick Hilliard <nick@foobar.org>; wrote:
:> On a related issue, it would probably be a good idea to run beacon tests
:> with other path attributes to see how they affect reachability, i.e.
:> have any other vendors squatted any other path attribute values, and if
:> large-communities is moved to 31 or 32, will it suffer the same problem?
:
:Even passive monitoring is a good start.

I just did a check of the DFZ, both IPv4 and IPv6, and these are the
unknown/deprecated attributes on paths that I can see.

20 	Connector Attribute (deprecated) 	[RFC6037]
21 	AS_PATHLIMIT (deprecated) 	[draft-ietf-idr-as-pathlimit]

count                      type      flags  len    data in hex
--------------------------------------------------------------
  43     Unknown Attribute #20 flags [OTP] len 14: 00 01 00 00 58 d6 00 00
02 8e cf d2 8d b5
   2     Unknown Attribute #21 flags [OTP] len 5: 02 00 00 57 da
   4     Unknown Attribute #21 flags [OTP] len 5: 07 00 00 2d c8
   2     Unknown Attribute #21 flags [OTP] len 5: 14 00 00 39 72

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