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Re: [Status] Status of Spring

Hannes Gredler <hannes@juniper.net> Fri, 11 October 2013 14:11 UTC

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Date: Fri, 11 Oct 2013 16:11:23 +0200
From: Hannes Gredler <hannes@juniper.net>
To: Robert Raszuk <robert@raszuk.net>
Message-ID: <20131011141123.GD29526@juniper.net>
References: <52569169.20404@cisco.com> <CA+b+ERmj13sz4yi+aQXwGKuu7boOKkz6CbcB9pYXqHV-_FMhSw@mail.gmail.com> <5256F76D.9080905@cisco.com> <7AE6A4247B044C4ABE0A5B6BF427F8E209913009@dfweml513-mbb.china.huawei.com> <339a1b4a20e74d719c7669a4f09ac337@BY2PR05MB142.namprd05.prod.outlook.com> <CA+b+ER=yE=mPi_CgV=8oyiykUvhd2BGVf7S7BZ36M0AF3gy0mA@mail.gmail.com> <7AE6A4247B044C4ABE0A5B6BF427F8E20991312A@dfweml513-mbb.china.huawei.com> <CA+b+ERk3Xpp3mizRhij5EMUsRcXMg4Qfh=6da-3t1S-Anf6_UQ@mail.gmail.com> <20131011110724.GB29384@juniper.net> <CA+b+ER=wEfYP5wdO=SFVd2Qdm2tdzBjbfYXKkvfr2wzadTE09A@mail.gmail.com>
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Cc: "status@ietf.org" <status@ietf.org>, AshwoodsmithPeter <Peter.AshwoodSmith@huawei.com>
Subject: Re: [Status] Status of Spring
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On Fri, Oct 11, 2013 at 03:00:02PM +0200, Robert Raszuk wrote:
| > please have a look at
| > http://sourceforge.net/apps/mediawiki/mpls-linux/index.php?title=Main_Page
| 
| [ ... ] Please point me to any
| linux distribution which officially supports this. Also please point
| me to the official linux kernel which supports mpls kernel project.

i am not sure if there is such a thing as an "official linux kernel"
  of course there is linus' and his lieutenants git trees - however
  every major linux distribution pulls from there and adds a ton
  of patches to it. - the linux MPLS extensions are basically
  kernel patches plus userspace utilizities - nothing more.
  so if you want to get it to work - get your favourite
  (linux from scratch) distro and apply the patches ...
  i did it with 'gentoo' linux and as far as i can tell it works fine
  even with l2vpn services on top of the transport LSPs.
    note that there are also pre-cooked debian ISO images with everything
    applied if you do not want to compile your kernel by yourself.

| > can you point me to the text which says so.
| > i could not find such a claim in rfc3031 ?
| 
| Not in rfc3031 but in rfc5036 .. pretty much the only practical
| signalling protocol for mpls transport (not an overlay mpls
| signalling):
| 
|    "Prefix SHOULD NOT use the label for forwarding unless its routing
|     table contains an entry that exactly matches the FEC Element."

oh yes, and this is indeed problematic ... and its fixed here:
http://www.ietf.org/rfc/rfc5283.txt

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