Re: [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)

<> Tue, 18 October 2016 15:41 UTC

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To: Susan Hares <>, 'IETF IDR WG' <>
Thread-Topic: [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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Date: Tue, 18 Oct 2016 15:41:24 +0000
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Cc: 'Kristian Larsson' <>
Subject: Re: [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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What about assigning attribute 30 and 139 for "Experimental" use? Especially since this registry has none currently.

      Experimental: Available for experimental use as described in
            [EXPERIMENTATION<>]N>].  IANA does not record specific
            assignments for any particular use.

[EXPERIMENTATION<>] "Assigning Experimental and Testing Numbers Considered Useful"

Obviously this assumes that people do use this value for experimentation, i.e. follow the rule...


From: Idr [] On Behalf Of Susan Hares
Sent: Tuesday, October 18, 2016 5:01 PM
Cc: 'Kristian Larsson'
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)


Early testing of the Large Communities draft (draft-ietf-idr-large-community-03.txt)  with attribute value of 30 detect that we had an implementation squatting on attribute 30 by a Huawei router.   "Squatting" on an attribute is anti-social behavior in the Internet in any release of software.

The individuals who did in Huawei have been contacted by Jie Dong, and "asked" if they had made this mistake in any other attribute.   These individuals confessed to Attribute 129 (for wide communities).  These individuals apologize to the Working group.

Now what shall we do? The large community draft is critical for several networks. After talking with the developers and operators, John and I would like to recommend we do the following:

IDR should recommend that the following attribute numbers be deprecated:

BGP Attribute 30
BGP attribute 129

IDR should ask IANA to assign BGP Large Communities (currently Attribute 30) to a new attribute number.  This is a 1 week call to determine if the IDR approves this action.   This call will allow the large communities draft to still continue with the 2 week WG LC.

John, Alvaro, and I have check the early allocation rules.  Implementations should ask for early allocation prior to releasing, and they do not need to be interoperability testing to request the early allocation for the attribute.

Sue Hares


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