Subject: [Bier] [Errata Held for Document Update] RFC8401 (6418)

From: RFC Errata System <[email-masked]>
Date: Tue, 2 Feb 2021 14:25:10 -0800 (PST)

The following errata report has been held for document update 
for RFC8401, "Bit Index Explicit Replication (BIER) Support via IS-IS". 

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You may review the report below and at:
https://www.rfc-editor.org/errata/eid6418

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Status: Held for Document Update
Type: Technical

Reported by: Les Ginsberg <[email-masked]>
Date Reported: 2021-01-31
Held by: Alvaro Retana (IESG)

Section: 4.2

Original Text
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 o  When the Prefix Attributes Flags sub-TLV [RFC7794] is present, the
      N flag MUST be set and the R flag MUST NOT be set.

Corrected Text
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  o  When the Prefix Attributes Flags sub-TLV [RFC7794] is present, the
      N flag MUST be set.

Notes
-----
Early versions of the draft did not support leaking of BIER advertisements. At that time the requirement that R-flag be clear made sense. Once leaking was allowed the prohibition against R-bit being set no longer makes sense and should be removed.

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RFC8401 (draft-ietf-bier-isis-extensions-11)
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Title               : Bit Index Explicit Replication (BIER) Support via IS-IS
Publication Date    : June 2018
Author(s)           : L. Ginsberg, Ed., T. Przygienda, S. Aldrin, Z. Zhang
Category            : PROPOSED STANDARD
Source              : Bit Indexed Explicit Replication
Area                : Routing
Stream              : IETF
Verifying Party     : IESG