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Re: [v6ops] new draft: draft-taylor-v6ops-fragdrop

Mark Andrews <marka@isc.org> Mon, 05 November 2012 00:00 UTC

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To: Randy Bush <randy@psg.com>
From: Mark Andrews <marka@isc.org>
References: <CAKD1Yr13cNspdWvTaXxHt4R_8UB-CKeA4nq8_XWrkbFGCgW7Gg@mail.gmail.com> <5090DECF.3050100@gmail.com> <CAKD1Yr1dUy-f78A2+kfA7NjpzD0WQRT8iwqGYAm5A=Erodpn-A@mail.gmail.com> <20121031.122110.41655699.sthaug@nethelp.no> <50910E41.2030100@gmail.com> <CAKD1Yr0mTTcVeq+Qf0fLv3UCBP_90QmStkK3Ha4tDdm3FxJjVA@mail.gmail.com> <50915F86.7050304@gmail.com> <509165B8.404@si6networks.com> <509169C2.9040208@isi.edu> <50916F21.6030303@si6networks.com> <509174F1.8080809@isi.edu> <50924264.7040300@gmail.com> <76E349F3-6022-4042-9B44-57507593B8DE@employees.org> <5094269F.3000705@bogus.com> <5094C9E7.4030306@gmail.com> <m2hap6zvv6.wl%randy@psg.com> <5095BC0F.80301@gmail.com> <m2sj8qxk16.wl%randy@psg.com>
In-reply-to: Your message of "Sun, 04 Nov 2012 09:56:53 +0900." <m2sj8qxk16.wl%randy@psg.com>
Date: Mon, 05 Nov 2012 11:00:15 +1100
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Cc: Fernando Gont <fgont@si6networks.com>, v6ops@ietf.org
Subject: Re: [v6ops] new draft: draft-taylor-v6ops-fragdrop
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While flow labels work for distributing traffic, they do not work
for filtering as there is guarentee that fragments will arrive in
order.  For filtering their need a copy of the headers routers are
using to filter to be available in all of the fragments.  At a
minimum this is the UDP header.  TCP should be able to be handled
with PTB being returned on fragmented packets.  I havn't thought
about other protocols.

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

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