Re: FW: New Version Notification for draft-bonica-6man-frag-deprecate-00.txt
Mark Andrews <marka@isc.org> Mon, 24 June 2013 03:10 UTC
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To: Doug Barton <dougb@dougbarton.us>
From: Mark Andrews <marka@isc.org>
References: <2CF4CB03E2AA464BA0982EC92A02CE2509F85151@BY2PRD0512MB653.namprd05.prod.outlook.com> <51C408BC.4030909@forthnetgroup.gr> <2CF4CB03E2AA464BA0982EC92A02CE2509F85BCB@BY2PRD0512MB653.namprd05.prod.outlook.com> <51C48776.9070107@globis.net> <2CF4CB03E2AA464BA0982EC92A02CE2509F85FBA@BY2PRD0512MB653.namprd05.prod.outlook.com> <51C4AD03.2050303@globis.net> <2CF4CB03E2AA464BA0982EC92A02CE2509F86075@BY2PRD0512MB653.namprd05.prod.outlook.com> <51C4BD1E.6030002@gmail.com> <51C7A69F.40400@dougbarton.us>
Subject: Re: FW: New Version Notification for draft-bonica-6man-frag-deprecate-00.txt
In-reply-to: Your message of "Sun, 23 Jun 2013 18:53:35 -0700." <51C7A69F.40400@dougbarton.us>
Date: Mon, 24 Jun 2013 13:09:39 +1000
Message-Id: <20130624030939.CA0DD363070C@drugs.dv.isc.org>
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In message <51C7A69F.40400@dougbarton.us>, Doug Barton writes: > Given that larger and faster pipes are becoming more common, and given > that we know that larger packet sizes make for more efficient > utilization of those pipes, IMO it's a really bad idea to "give up the > fight" at this early stage in IPv6 deployment. > > Until there is dramatic evidence to the contrary it seems to me that > it's still worthwhile to push for making the protocol work as designed. > > Doug For DNS PMTUD is just too slow (TCP) or doesn't work (UDP) as the servers don't keep query state to resend replies on ICMPv6 frag required and client retries are just too slow to trigger the resend. This is why I pushed for a way to say fragment at 1280 back in '98[1] which became IPv6_USE_MIN_MTU[2]. A recursive server has around 3 seconds to do a DNS lookup before the client gives up. In that time it has to talk to multiple servers. Deal with dead servers. Deal with packet loss due to congestion. Deal with broken servers that don't respond. Deal with PMTUD. Deal with broken firewalls that don't pass fragments. PMTUD can be eliminated by setting IPv6_USE_MIN_MTU. This should result in UDP fragments and TCP segments that don't get blocked due to IP packet size. Some TCP stacks are broken as IPv6_USE_MIN_MTU is ignored when they do their MSS negotiation. As far as I can see the main reason fragmentation becomes a issue is that firewalls and load balancers can't determine what to do with a fragment as some information from the L4 header is missing. If we supply that information in every fragment as a hop-by-hop option{s} most of the problems are addressed. You still have some firewalls that want to do deep inspection of the packet but even then they could reassemble after filtering based on the hop-by-hop option{s} which would provide some protection to the reassembly queues on the firewall. I also don't see what the deep inspection of UDP/DNS packets is trying to accomplish when the same firewall passes TCP/DNS messages without reassembling them. If you are a malicious server you would just set TC=1 and attack the client over TCP. Yes, most clients do correctly handle TC=1. Mark [1] https://datatracker.ietf.org/doc/draft-ietf-ipngwg-bsd-frag/ [2] http://tools.ietf.org/html/rfc3542 -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: marka@isc.org
- Re: draft-bonica-6man-frag-deprecate sthaug
- Re: New Version Notification for draft-bonica-6ma… Fred Baker (fred)
- Re: Meta-issues: On the deprecation of the fragme… Carsten Bormann
- RE: draft-bonica-6man-frag-deprecate Templin, Fred L
- FW: New Version Notification for draft-bonica-6ma… Ronald Bonica
- Re: FW: New Version Notification for draft-bonica… Arturo Servin
- Re: New Version Notification for draft-bonica-6ma… Mark Smith
- Re: FW: New Version Notification for draft-bonica… Tassos Chatzithomaoglou
- Re: FW: New Version Notification for draft-bonica… Simon Perreault
- RE: FW: New Version Notification for draft-bonica… Ronald Bonica
- Re: RE: FW: New Version Notification for draft-bo… Ray Hunter
- Re: FW: New Version Notification for draft-bonica… joel jaeggli
- RE: FW: New Version Notification for draft-bonica… Ronald Bonica
- RE: RE: FW: New Version Notification for draft-bo… Ronald Bonica
- Re: FW: New Version Notification for draft-bonica… Ray Hunter
- Re: New Version Notification for draft-bonica-6ma… Fred Baker (fred)
- RE: FW: New Version Notification for draft-bonica… Ronald Bonica
- Re: FW: New Version Notification for draft-bonica… Brian E Carpenter
- RE: FW: New Version Notification for draft-bonica… Ronald Bonica
- Re: FW: New Version Notification for draft-bonica… Tore Anderson
- Re: FW: New Version Notification for draft-bonica… Mark Andrews
- RE: FW: New Version Notification for draft-bonica… Templin, Fred L
- Re: New Version Notification for draft-bonica-6ma… Fred Baker (fred)
- Re: New Version Notification for draft-bonica-6ma… Glen Turner
- Re: New Version Notification for draft-bonica-6ma… George Michaelson
- Re: New Version Notification for draft-bonica-6ma… Mark Andrews
- RE: New Version Notification for draft-bonica-6ma… Sheng Jiang
- Re: FW: New Version Notification for draft-bonica… Doug Barton
- RE: FW: New Version Notification for draft-bonica… Liubing (Leo)
- Re: FW: New Version Notification for draft-bonica… Mark Andrews
- Re: New Version Notification for draft-bonica-6ma… Tore Anderson
- RE: FW: New Version Notification for draft-bonica… Ronald Bonica
- RE: New Version Notification for draft-bonica-6ma… Ronald Bonica
- RE: New Version Notification for draft-bonica-6ma… Ronald Bonica
- Re: New Version Notification for draft-bonica-6ma… Ole Troan
- RE: New Version Notification for draft-bonica-6ma… Templin, Fred L
- Re: FW: New Version Notification for draft-bonica… Marc Lampo
- Re: FW: New Version Notification for draft-bonica… Mark Smith
- Re: FW: New Version Notification for draft-bonica… Hagen Paul Pfeifer
- Re: FW: New Version Notification for draft-bonica… Hagen Paul Pfeifer
- RE: FW: New Version Notification for draft-bonica… Ronald Bonica
- Re: New Version Notification for draft-bonica-6ma… james woodyatt
- Re: New Version Notification for draft-bonica-6ma… joel jaeggli
- Re: New Version Notification for draft-bonica-6ma… james woodyatt
- RE: New Version Notification for draft-bonica-6ma… Sheng Jiang
- Re: New Version Notification for draft-bonica-6ma… George Michaelson
- Re: New Version Notification for draft-bonica-6ma… Mark Andrews
- Re: New Version Notification for draft-bonica-6ma… joel jaeggli
- RE: New Version Notification for draft-bonica-6ma… Ronald Bonica
- Re: FW: New Version Notification for draft-bonica… Brian E Carpenter
- Re: FW: New Version Notification for draft-bonica… Randy Bush
- Re: FW: New Version Notification for draft-bonica… joel jaeggli
- Re: New Version Notification for draft-bonica-6ma… Mark Andrews
- Re: New Version Notification for draft-bonica-6ma… George Michaelson
- Re: New Version Notification for draft-bonica-6ma… Fred Baker (fred)
- Re: New Version Notification for draft-bonica-6ma… Geoff Huston
- Re: FW: New Version Notification for draft-bonica… Mark Andrews
- Re: New Version Notification for draft-bonica-6ma… Mark Andrews
- Re: New Version Notification for draft-bonica-6ma… Bob Hinden
- Re: New Version Notification for draft-bonica-6ma… Glen Turner
- Re: New Version Notification for draft-bonica-6ma… Geoff Huston
- Re: New Version Notification for draft-bonica-6ma… Tore Anderson
- Re: FW: New Version Notification for draft-bonica… John Leslie
- RE: FW: New Version Notification for draft-bonica… Templin, Fred L
- RE: New Version Notification for draft-bonica-6ma… Christian Huitema
- Re: [6MAN] New Version Notification for draft-bon… Warren Kumari
- Re: New Version Notification for draft-bonica-6ma… Ole Troan
- Re: FW: New Version Notification for draft-bonica… Brian Jones
- Re: New Version Notification for draft-bonica-6ma… Randy Bush
- Re: New Version Notification for draft-bonica-6ma… Ole Troan
- Re: New Version Notification for draft-bonica-6ma… Randy Bush
- RE: New Version Notification for draft-bonica-6ma… Tony Hain
- Re: New Version Notification for draft-bonica-6ma… Mark Andrews
- RE: draft-bonica-6man-frag-deprecate Templin, Fred L
- Re: New Version Notification for draft-bonica-6ma… Fred Baker (fred)
- Re: New Version Notification for draft-bonica-6ma… james woodyatt
- Re: New Version Notification for draft-bonica-6ma… Randy Bush
- Re: New Version Notification for draft-bonica-6ma… Mark Andrews
- Re: New Version Notification for draft-bonica-6ma… Brian E Carpenter
- Re: New Version Notification for draft-bonica-6ma… George Michaelson
- Re: New Version Notification for draft-bonica-6ma… Brian E Carpenter
- Re: New Version Notification for draft-bonica-6ma… Mark Andrews
- Re: New Version Notification for draft-bonica-6ma… Kevin Lahey
- RE: New Version Notification for draft-bonica-6ma… Tony Hain
- Re: New Version Notification for draft-bonica-6ma… Mark Andrews
- RE: New Version Notification for draft-bonica-6ma… Sheng Jiang
- Re: New Version Notification for draft-bonica-6ma… Fred Baker (fred)
- Re: New Version Notification for draft-bonica-6ma… Randy Bush
- Re: New Version Notification for draft-bonica-6ma… Mark ZZZ Smith
- Re: New Version Notification for draft-bonica-6ma… Fred Baker (fred)
- Re: New Version Notification for draft-bonica-6ma… Hagen Paul Pfeifer
- Re: New Version Notification for draft-bonica-6ma… Mark Andrews
- Re: draft-bonica-6man-frag-deprecate Hagen Paul Pfeifer
- Re: New Version Notification for draft-bonica-6ma… Fernando Gont
- Re: New Version Notification for draft-bonica-6ma… james woodyatt
- Re: New Version Notification for draft-bonica-6ma… Mark Andrews
- draft-bonica-6man-frag-deprecate Brian E Carpenter
- Re: New Version Notification for draft-bonica-6ma… Randy Bush
- Re: New Version Notification for draft-bonica-6ma… Fred Baker (fred)
- Re: New Version Notification for draft-bonica-6ma… Fernando Gont
- Re: draft-bonica-6man-frag-deprecate Marc Lampo
- RE: draft-bonica-6man-frag-deprecate Templin, Fred L
- Re: draft-bonica-6man-frag-deprecate Antonios Atlasis
- RE: draft-bonica-6man-frag-deprecate Templin, Fred L
- Re: draft-bonica-6man-frag-deprecate Antonios Atlasis
- RE: draft-bonica-6man-frag-deprecate Tony Hain
- Re: draft-bonica-6man-frag-deprecate Fred Baker (fred)
- Re: draft-bonica-6man-frag-deprecate Mark Andrews
- Re: draft-bonica-6man-frag-deprecate Karl Auer
- RE: draft-bonica-6man-frag-deprecate Templin, Fred L
- Re: draft-bonica-6man-frag-deprecate Ole Troan
- Re: draft-bonica-6man-frag-deprecate Mark Andrews
- Re: New Version Notification for draft-bonica-6ma… Erik Nygren
- RE: New Version Notification for draft-bonica-6ma… Templin, Fred L
- Re: New Version Notification for draft-bonica-6ma… james woodyatt
- RE: New Version Notification for draft-bonica-6ma… Templin, Fred L
- Re: New Version Notification for draft-bonica-6ma… james woodyatt
- RE: New Version Notification for draft-bonica-6ma… Templin, Fred L
- Re: New Version Notification for draft-bonica-6ma… Brian E Carpenter
- RE: New Version Notification for draft-bonica-6ma… Templin, Fred L
- Meta-issues: On the deprecation of the fragmentat… Fernando Gont
- Re: Meta-issues: On the deprecation of the fragme… Brian E Carpenter
- Re: New Version Notification for draft-bonica-6ma… Brian E Carpenter
- RE: draft-bonica-6man-frag-deprecate Templin, Fred L
- RE: Meta-issues: On the deprecation of the fragme… Templin, Fred L
- RE: New Version Notification for draft-bonica-6ma… Templin, Fred L
- Re: Meta-issues: On the deprecation of the fragme… Hannes Frederic Sowa
- Re: New Version Notification for draft-bonica-6ma… Brian E Carpenter
- RE: draft-bonica-6man-frag-deprecate Templin, Fred L
- Re: New Version Notification for draft-bonica-6ma… Doug Barton
- Re: Meta-issues: On the deprecation of the fragme… Antonios Atlasis
- Re: draft-bonica-6man-frag-deprecate Ole Troan
- Re: Meta-issues: On the deprecation of the fragme… C. M. Heard
- RE: draft-bonica-6man-frag-deprecate Templin, Fred L
- RE: New Version Notification for draft-bonica-6ma… Templin, Fred L
- RE: New Version Notification for draft-bonica-6ma… Templin, Fred L
- Re: Meta-issues: On the deprecation of the fragme… Francis Dupont
- Re: Meta-issues: On the deprecation of the fragme… Marc Lampo
- Re: Meta-issues: On the deprecation of the fragme… Fernando Gont
- Re: Meta-issues: On the deprecation of the fragme… Fernando Gont
- RE: Meta-issues: On the deprecation of the fragme… Manfredi, Albert E
- RE: Meta-issues: On the deprecation of the fragme… Manfredi, Albert E
- Re: Meta-issues: On the deprecation of the fragme… Mark Andrews
- RE: Meta-issues: On the deprecation of the fragme… RJ Atkinson
- Re: Meta-issues: On the deprecation of the fragme… Randy Bush
- Re: Meta-issues: On the deprecation of the fragme… Brian Jones
- Re: Meta-issues: On the deprecation of the fragme… Carsten Bormann
- Re: Meta-issues: On the deprecation of the fragme… RJ Atkinson
- Re: Meta-issues: On the deprecation of the fragme… Doug Barton
- RE: Meta-issues: On the deprecation of the fragme… Ronald Bonica
- Re: Meta-issues: On the deprecation of the fragme… Doug Barton
- Re: Meta-issues: On the deprecation of the fragme… Carsten Bormann
- RE: Meta-issues: On the deprecation of the fragme… Templin, Fred L
- RE: Meta-issues: On the deprecation of the fragme… Ronald Bonica
- Re: Meta-issues: On the deprecation of the fragme… RJ Atkinson
- RE: Meta-issues: On the deprecation of the fragme… Templin, Fred L
- RE: Meta-issues: On the deprecation of the fragme… Templin, Fred L
- RE: Meta-issues: On the deprecation of the fragme… Ronald Bonica
- RE: Meta-issues: On the deprecation of the fragme… Templin, Fred L
- RE: Meta-issues: On the deprecation of the fragme… Ronald Bonica
- RE: Meta-issues: On the deprecation of the fragme… Templin, Fred L
- Re: Meta-issues: On the deprecation of the fragme… james woodyatt
- RE: Meta-issues: On the deprecation of the fragme… Ronald Bonica
- RE: Meta-issues: On the deprecation of the fragme… Templin, Fred L
- RE: Meta-issues: On the deprecation of the fragme… Templin, Fred L
- RE: Meta-issues: On the deprecation of the fragme… Templin, Fred L
- Re: Meta-issues: On the deprecation of the fragme… james woodyatt
- RE: Meta-issues: On the deprecation of the fragme… Ronald Bonica
- RE: Meta-issues: On the deprecation of the fragme… Templin, Fred L
- Re: Meta-issues: On the deprecation of the fragme… Brian E Carpenter
- RE: "Deprecate" Templin, Fred L
- Re: "Deprecate" Mark Andrews
- Re: "Deprecate" Francis Dupont
- Re: "Deprecate" RJ Atkinson
- Re: "Deprecate" RJ Atkinson
- RE: "Deprecate" Templin, Fred L
- RE: "Deprecate" Templin, Fred L
- RE: "Deprecate" Templin, Fred L
- RE: "Deprecate" Templin, Fred L
- RE: "Deprecate" C. M. Heard