Re: [Idr] Adoption call for draft-heitz-idr-wklc-02 (3/9 to 3/23)

"Jakob Heitz (jheitz)" <jheitz@cisco.com> Wed, 10 March 2021 13:18 UTC

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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Aijun Wang <wangaijun@tsinghua.org.cn>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] Adoption call for draft-heitz-idr-wklc-02 (3/9 to 3/23)
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Date: Wed, 10 Mar 2021 13:17:44 +0000
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Subject: Re: [Idr] Adoption call for draft-heitz-idr-wklc-02 (3/9 to 3/23)
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Consider if there is a real AS that uses 4,093,640,704 as its ASN.
And if this AS were to send a large community of its own.
It would put its ASN into the Global Administrator field of the LC.
This ASN is 11110100000000000000000000000000 in binary.
Then another AS sends a WKLC with WKLC ID 0, Transitivity 0 and Data 1 = 0.
This has the same bit pattern.
To avoid the clash, we need to reserve the ASNs that would clash.

Regards,
Jakob.

From: Aijun Wang <wangaijun@tsinghua.org.cn>
Sent: Wednesday, March 10, 2021 12:11 AM
To: Jakob Heitz (jheitz) <jheitz@cisco.com>om>; 'Susan Hares' <shares@ndzh.com>om>; idr@ietf.org
Subject: RE: [Idr] Adoption call for draft-heitz-idr-wklc-02 (3/9 to 3/23)

And, what the reason to assign the "111101"value in the first 6bit your encoding? It is not conformed to general definition of large community, in which the first 4-bytes is to identify the Global Administrator.