Re: [tcpm] [tsvwg] Cross-area alignment on "L4S and RACK"

Fred Baker <> Fri, 09 November 2018 06:57 UTC

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From: Fred Baker <>
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Date: Fri, 9 Nov 2018 13:57:09 +0700
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Cc: Bob Briscoe <>, "" <>, "" <>
To: "Scharf, Michael" <>
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Subject: Re: [tcpm] [tsvwg] Cross-area alignment on "L4S and RACK"
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> On Nov 9, 2018, at 1:21 PM, Scharf, Michael <> wrote:
> I don’t see the fundamental difference between a link technology that guarantees in-order delivery within a flow (say by flow hashing, see ECMP) vs. some link scheme that guarantees in-order delivery, say, only for some fraction of the traffic characterized by some other means (say, other header bits).

A comment on ECMP via hashing; it doesn't guarantee in-order delivery. It does support-if-not-quite-guarantee in-order delivery as long as nothing changes. However, if relevant routing changes, sequence can be affected until routing stabilizes.

A lawyer told me once that "guarantee" is a word freighted with money...

Victorious warriors win first and then go to war,
Defeated warriors go to war first and then seek to win.
     Sun Tzu