[Idr] BGP Attribute for Large communities (Attribute 30) was squatted on - Let's get a new attribute number (1 week WG call (10/18 to 10/25)

"Susan Hares" <shares@ndzh.com> Mon, 24 October 2016 12:20 UTC

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From: "Susan Hares" <shares@ndzh.com>
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Date: Mon, 24 Oct 2016 08:18:56 -0400
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Subject: [Idr] BGP Attribute for Large communities (Attribute 30) was squatted on - Let's get a new attribute number (1 week WG call (10/18 to 10/25)
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IDR Working group: 


Thank you for your input on the question of whether Large communities should
be reassigned another attribute number due to Huawei squatting on attribute
30.  The WG consensus is that the IDR WG wishes to have IANA deprecate
attribute 30, and reassign large communities another attribute number for
its early allocation.    


Alvaro should request a new attribute number for wide communities. 


If wide communities implementers request an early allocation, the WG
consensus was unclear.  Therefore,  the code point of 129 is deprecated for
now.  The full discussion on this point is at: 




The following other attributes were seen in the wild with the comments we


#        BGP function                                      Reference 

----    -----------------------------------------------   ---------------

20     Connector Attribute (deprecated)   [RFC6037]  

21      AS_PATHLIMIT (deprecated)           [draft-ietf-idr-as-pathlimit,

30     (deprecated)                                       [variant of
draft-ietf-tunnel-encaps, Huawei router]

129   (deprecated)
[draft-ietf-idr-wide-bgp-communities, Huawei router] 


Attribute  AS Attribute Observed                           

-----------   --------------------------------

20           AS 22742  (Peter Hessler)                        

21           AS 14706, AS 11720, AS 22490 



30   -  in trials reported by Job 

129 -  self-reported by Huawei 


Sue Hares