[Dime] Suresh Krishnan's Discuss on draft-ietf-dime-rfc4006bis-08: (with DISCUSS and COMMENT)

Suresh Krishnan <suresh@kaloom.com> Wed, 23 May 2018 20:55 UTC

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From: Suresh Krishnan <suresh@kaloom.com>
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Date: Wed, 23 May 2018 13:55:26 -0700
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Subject: [Dime] Suresh Krishnan's Discuss on draft-ietf-dime-rfc4006bis-08: (with DISCUSS and COMMENT)
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Suresh Krishnan has entered the following ballot position for
draft-ietf-dime-rfc4006bis-08: Discuss

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DISCUSS:
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Section 8.38.

RFC5952 contains significant changes in text representation from RFC3513 and I
am concerned that there might be RFC4006 compliant implementations that will no
longer be legal with a MUST level use of RFC5952. e.g. Addresses with upper
case hex digits, with leading zeroes in 16 bit fields etc. Has the working
group considered this break in compatibility already in its discussions?

If it has, this text should still be finessed a bit because RFC5952
recommendations (even at the MUST level) are a SHOULD for senders with the
receivers being required to handle all possible legal formats as per RFC4291.
So at least the sender rules and receiver rules need to be written differently.


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COMMENT:
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Section 8.65

Any reason you are allowing encoding an IPv4 address as a IPv4-Mapped IPv6
Address while you can directly use address family 1 to encode it directly as an
IPv4 address? This allows for two different encodings for the same address.