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Status: Verified (1)

RFC 4384, "BGP Communities for Data Collection", February 2006

Errata ID: 4550
Status: Verified
Type: Technical
Publication Format(s) : TEXT
Reported By: Warren Turkal
Date Reported: 2015-12-01
Verifier Name: Warren Kumari (Ops AD)
Date Verified: 2023-02-06

Section 4.1 says:

The chart at the bottom of 4.1:

      0                   1                   2                   3
      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |      0x00     |      0x0008   |           0x2A7C              |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |      0x00     |      0x00     |           0x10F2              |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

It should say:

      0                   1                   2                   3
      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |      0x00     |      0x08     |           0x2A7C              |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |      0x00     |      0x00     |           0x10F2              |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Notes:

The second group has a hex value that looks like two octets: "0x0008". If I am interpreting the chart, extended community RFCs, and the extended community IANA registry correctly, the second group should be a single octet (i.e., "0x08").

Also, the same error is in the Section 4.2 chart.

Warren Kumari: I've marked this Verified, and retained the previous rejection note below for transparency.

See registry at: https://www.iana.org/assignments/bgp-extended-communities/bgp-extended-communities.xhtml#trans-two-octet-as for details, and also thread at: https://mailarchive.ietf.org/arch/msg/grow/p0NDCuSN8YfvVqG1mlyGv0b3-Ng/




--PREVIOUS VERIFIER NOTES--
The Transitive Two-Octet AS-Specific Extended Community Sub-Types registry specifies the low order byte as it notes:

Reference
[RFC7153]
Note
This registry contains values of the second octet (the "Sub-Type"
field) of an extended community when the value of the first
octet (the "Type" field) is 0x00.

so the diagram which includes both is correct but obviously somewhat hard to read since it contains both bytes. I think this proposed text ads little additional clarity.

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