<WG chair hat off, author hat on>

Hi Tero,

I think RFC 6989 (additional tests when reusing DH values) should be a normative reference, and the text at the bottom of 2.12 should be strengthened to something like:

In such cases, additional tests defined in [RFC6989] MUST be performed by the IKE peers. See this document, as well as [REUSE] for a security analysis of this practice.

Rationale: even if EC groups (and the "DSA groups") are not defined in RFC 5996, they are a mainstream use case and the RFC 6989 tests are security critical for them. Also, process-wise, RFC 6989 is a Standards Track document so the normative reference is legit.

Small typo: in Sec. 3.3.2, "do not need" -> "does not need", and "needs to have" -> "need to have".

<switch hats now>

Thanks,
        Yaron

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