Re: [Idr] Unknown Attributes seen in the wild

'Peter Hessler' <phessler@theapt.org> Tue, 18 October 2016 17:55 UTC

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Date: Tue, 18 Oct 2016 19:55:03 +0200
From: 'Peter Hessler' <phessler@theapt.org>
To: Susan Hares <shares@ndzh.com>
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Subject: Re: [Idr] Unknown Attributes seen in the wild
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For #20, all are coming from AS 22742

For #21, 2 are from AS 14706, 4 are from AS 11720, and 2 from AS 22490.

-peter


On 2016 Oct 18 (Tue) at 13:48:10 -0400 (-0400), Susan Hares wrote:
: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