This is my review of draft-ietf-quic-v2-05 as part of ART Last Call review. Overall this is a well written document that is clear in its writing, and I have only one minor point of clarification. Section 4.1 - "The client ignores Retry packets using other versions." - is this supposed to be a normative phrase, i.e. "The client SHOULD/MUST ignore Retry packets"? This sentence feels out of place in a paragraph with normative text defining other requirements. Or is this a behaviour defined in VN that I have missed?