Re: [quicwg/base-drafts] Ipv6 flow label (#2399)

Brian E Carpenter <> Fri, 08 February 2019 19:17 UTC

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From: Brian E Carpenter <>
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Subject: Re: [quicwg/base-drafts] Ipv6 flow label (#2399)
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fwiw [RFC6437]( is (intentionally) non-specific about the hash function. It says "If a hash algorithm is used, as suggested in Section 3, it SHOULD include a step that makes the flow label value significantly difficult to predict [RFC4086], even with knowledge of the algorithm being used." We didn't see any real need to specify a crypto hash for this purpose, but it's certainly OK. (The example in Appendix A of 6437 stinks and I regret it.)

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