Re: [trill] Fwd: Mail regarding draft-ietf-trill-over-ip
Joe Touch <touch@isi.edu> Tue, 05 May 2015 18:26 UTC
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Date: Tue, 05 May 2015 11:26:09 -0700
From: Joe Touch <touch@isi.edu>
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To: "Templin, Fred L" <Fred.L.Templin@boeing.com>, Xuxiaohu <xuxiaohu@huawei.com>, Donald Eastlake <d3e3e3@gmail.com>, "trill@ietf.org" <trill@ietf.org>
References: <4552F0907735844E9204A62BBDD325E76ABADC85@nkgeml512-mbx.china.huawei.com> <CAF4+nEHSGYa+1DHzwee+RNgkXfZra_Pa9706vqpTGJV71SmDaw@mail.gmail.com> <CAF4+nEFcUL2ieQKCm98_0XxfrrAR0M11irVFfOfqa=92OM1V=A@mail.gmail.com> <5543D870.6080108@isi.edu> <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE0832A468@NKGEML512-MBS.china.huawei.com> <55479A6D.2040403@isi.edu> <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE0832A7B7@NKGEML512-MBS.china.huawei.com> <2134F8430051B64F815C691A62D9831832E5A834@XCH-BLV-504.nw.nos.boeing.com> <5548F132.7050704@isi.edu> <2134F8430051B64F815C691A62D9831832E5A90F@XCH-BLV-504.nw.nos.boeing.com> <5549039C.2020709@isi.edu> <2134F8430051B64F815C691A62D9831832E5ABBE@XCH-BLV-504.nw.nos.boeing.com>
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Subject: Re: [trill] Fwd: Mail regarding draft-ietf-trill-over-ip
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On 5/5/2015 11:04 AM, Templin, Fred L wrote: > Hi Joe, > >> -----Original Message----- >> From: Joe Touch [mailto:touch@isi.edu] >> Sent: Tuesday, May 05, 2015 10:54 AM >> To: Templin, Fred L; Xuxiaohu; Donald Eastlake; trill@ietf.org >> Cc: nvo3@ietf.org; int-area@ietf.org; sfc@ietf.org >> Subject: Re: [trill] Fwd: Mail regarding draft-ietf-trill-over-ip >> >> >> >> On 5/5/2015 9:39 AM, Templin, Fred L wrote: >>> Hi Joe, >> .. >>>> IP in UDP adds only port numbers and an Internet checksum. >>>> >>>> That doesn't address fragmentation; if outer fragmentation is assumed, >>>> IPv4 needs to be rate-limited to avoid ID collisions and the Internet >>>> checksum is insufficient to correct those collisions. >>> >>> Right - that is why we have GUE. But, when these functions are not >>> needed GUE can perform header compression and the result looks >>> exactly like IP in UDP. >> >> That seems impossible. > > Not impossible - Tom Herbert provided the solution: > > http://www.ietf.org/mail-archive/web/int-area/current/msg04593.html That is allocating bits (or bit patterns) from the IP header. The solution provided - to check for 0x01 - is incorrect. IP can have versions that include 0x10 and 0x11. The only solution would be to say that if the first three bits were 0, then it's not an IP packet - but that would require reassigning 0x0000 and 0x0001 for GUE purposes. Although that's possible, I don't see why we would allocate IP versions to GUE message types. Joe
- [trill] Fwd: Mail regarding draft-ietf-trill-over… Donald Eastlake
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Joe Touch
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Donald Eastlake
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Donald Eastlake
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Xuxiaohu
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Tom Herbert
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Joe Touch
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Joe Touch
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Xuxiaohu
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Templin, Fred L
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Joe Touch
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Joe Touch
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Templin, Fred L
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Joe Touch
- Re: [trill] [sfc] Fwd: Mail regarding draft-ietf-… Joe Touch
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Templin, Fred L
- Re: [trill] [nvo3] Fwd: Mail regarding draft-ietf… Tom Herbert
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Joe Touch
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Tom Herbert
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Templin, Fred L
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Tom Herbert
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Joe Touch
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Joe Touch
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Joe Touch
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Joe Touch
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Templin, Fred L
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Templin, Fred L
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Joe Touch
- Re: [trill] [sfc] Fwd: Mail regarding draft-ietf-… Joe Touch
- Re: [trill] [sfc] Fwd: Mail regarding draft-ietf-… Templin, Fred L
- Re: [trill] [sfc] Fwd: Mail regarding draft-ietf-… Joe Touch
- Re: [trill] [sfc] Fwd: Mail regarding draft-ietf-… Templin, Fred L
- Re: [trill] [sfc] Fwd: Mail regarding draft-ietf-… Joe Touch
- Re: [trill] [sfc] Fwd: Mail regarding draft-ietf-… Templin, Fred L
- Re: [trill] [sfc] Fwd: Mail regarding draft-ietf-… Joe Touch
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Xuxiaohu
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Xuxiaohu
- Re: [trill] [sfc] Fwd: Mail regarding draft-ietf-… Templin, Fred L
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Templin, Fred L
- Re: [trill] [sfc] Fwd: Mail regarding draft-ietf-… Joe Touch
- Re: [trill] [sfc] Fwd: Mail regarding draft-ietf-… Templin, Fred L
- Re: [trill] Fwd: Mail regarding draft-ietf-trill-… Xuxiaohu