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Re: [v6ops] Fragments [ULA draft revision #2 Regarding isolated networks]

Philip Homburg <pch-v6ops-3a@u-1.phicoh.com> Wed, 28 May 2014 14:23 UTC

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References: <8AE0F17B87264D4CAC7DE0AA6C406F453D8B6B9A@nkgeml506-mbx.china.huawei.com> <m261ks7xww.wl%randy@psg.com> <53840070.90801@gmail.com> <m2y4xn7wep.wl%randy@psg.com> <53840723.8010606@gmail.com> <CAKD1Yr1O_poMR200sjU=ttRvGaeQRkC1ZfXC0Ok4uQxdq3K=NQ@mail.gmail.com> <m2mwe37tbn.wl%randy@psg.com> <CAKD1Yr2t3-vxuG=iDi4biBNFpJwuzuHgfpB74i_uydWWRV7qZg@mail.gmail.com> <8AE0F17B87264D4CAC7DE0AA6C406F453D8B6E02@nkgeml506-mbx.china.huawei.com> <m2fvjv7q4h.wl%randy@psg.com> <m1WpDcc-0000BMC@stereo.hq.phicoh.net> <43BB867C-7BCA-45F6-8ADC-A49B34D6C0DC@nominum.com> <5384937A.90409@foobar.org> <96747494E3D74D41B20907035DB1E48D335AAB3D@MOPESMBX03.eu.thmulti.com> <20140527222313.7B12716B8D59@rock.dv.isc.org> <53851236.8020209@bogus.com> <5385522F.40305@gmail.com> <4BA71D7E-7A38-4327-8C7D-7E49F047CDDB@ecs.soton.ac.uk> <EMEW3|51fc5e85b5e6c2650a1f63c2b27fdf6fq4RARx03tjc|ecs.soton.ac.uk|4BA71D7E-7A38-4327-8C7D-7E49F047CDDB@ecs.soton.ac.uk> <2134F8430051B64F815C691A62D983181B2B5F33@XCH-BLV-504.nw.no s.boeing.com>
In-reply-to: Your message of "Wed, 28 May 2014 14:15:48 +0000 ." <2134F8430051B64F815C691A62D983181B2B5F33@XCH-BLV-504.nw.nos.boeing.com>
Date: Wed, 28 May 2014 16:23:14 +0200
Archived-At: http://mailarchive.ietf.org/arch/msg/v6ops/JsUcuEvuyAyPtOuw-7tkz9JKbFw
Subject: Re: [v6ops] Fragments [ULA draft revision #2 Regarding isolated networks]
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In your letter dated Wed, 28 May 2014 14:15:48 +0000 you wrote:
>> Tests that Fernando and I reported at the last IEPG show around 50% of the Alexa top 
>1m sites which
>> support IPv6 also drop frags.  Tests for other types of EH are far from encouraging t
>oo.
>
>Then, how are we ever going to support tunnels over IPv6?

Measurements using RIPE Atlas suggest that most filtering is done near the edges.
So if you want a tunnel, make sure that your site and the remote site don't do that
kind of filtering.

In addition, fragmentation involving DNS seems to work way better than sending
fragmented packets to the Alexa top 1m sites. So the kind of filtering you encounter
may also depend on where you look.

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