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Re: draft-wang-6man-flow-label-reflection

Mark Andrews <marka@isc.org> Tue, 18 November 2014 03:49 UTC

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To: Jeroen Massar <jeroen@massar.ch>
From: Mark Andrews <marka@isc.org>
References: <5465C0AC.10801@massar.ch> <5D36713D8A4E7348A7E10DF7437A4B923AF75421@nkgeml512-mbx.china.huawei.com>, <546681A0.9070703@massar.ch> <5D36713D8A4E7348A7E10DF7437A4B923AF75695@nkgeml512-mbx.china.huawei.com> <5466928E.6070800@massar.ch> <008801d00070$580df030$0829d090$@org.cn> <5466BFB0.303@massar.ch> <008601d00203$4175c8e0$c4615aa0$@org.cn> <5469ABB2.4060303@massar.ch> <006801d002d0$f1a01e00$d4e05a00$@org.cn> <546AAD68.4020400@massar.ch>
Subject: Re: draft-wang-6man-flow-label-reflection
In-reply-to: Your message of "Tue, 18 Nov 2014 03:22:32 +0100." <546AAD68.4020400@massar.ch>
Date: Tue, 18 Nov 2014 14:48:59 +1100
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In message <546AAD68.4020400@massar.ch>, Jeroen Massar writes:
> Why do we need a Flow Label then?
> 
> Please note that a five-tuple is perfectly fine for making up a random
> id so that one "only has to do deep analysis work once". This is what
> people have been using for as long a they have been doing this kind of 
> work.

And it doesn't work with IPv4 either.  Fragmented IPv4 traffic also
fails to be correctly forwarded by load balancers which look at TCP
and UDP ports.

Just because it works "most of the time" doesn't mean that it isn't
broken.

Mark
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka@isc.org

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