That's a good question, and you can see it both ways.
- The draft says that the PAD processing in RFC 4301 needs to be updated for
this draft, so the draft updates RFC 4301.
- Implementations of RFC 4301 that do not care about IKEv2 using this draft
should not be updated, so this draft doesn't update 4301, just the 4301
processing when using IKEv2 and this draft.
I tend toward the second interpretation, but am happy either way. What do
others think?
--Paul Hoffman
I tend the other way, so we need an example or two. If you read the
abstract of RFC 6040, it says: "On decapsulation, [RFC 6040] updates
both RFC 3168 and RFC 4301 to add new behaviours for previously unused
combinations of inner and outer headers." Which means that even though
existing implementations are not affected until they encounter these new
message variants, we use "Updates" because new implementations are
expected to include the new behavior.
Thanks,
Yaron
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