[Idr] Unknown Attributes seen in the wild

Peter Hessler <phessler@theapt.org> Tue, 18 October 2016 17:25 UTC

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Date: Tue, 18 Oct 2016 19:25:38 +0200
From: Peter Hessler <phessler@theapt.org>
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References: <01f401d22950$7f988470$7ec98d50$@ndzh.com> <5806484F.5080006@foobar.org> <6E6CFB88-04E7-45B6-A325-F57A165E901A@pfrc.org>
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Subject: [Idr] Unknown Attributes seen in the wild
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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