Re: [Idr] WG LC on draft-ietf-idr-large-community-03.txt (10/17/2016 to 10/31/2016)
Brian Dickson <brian.peter.dickson@gmail.com> Fri, 21 October 2016 00:28 UTC
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References: <01f301d228b4$e3319ef0$a994dcd0$@ndzh.com> <20161017215134.GA464@pfrc.org> <20161018190851.GC15392@shrubbery.net> <20161018191521.GT95811@Vurt.local> <9EFC9BAA-F917-4C70-A139-1F69CAECF9C0@pfrc.org> <20161020215938.GE1074@Vurt.local> <adb00bcd7b8e45db857eae7019c646fc@XCH-ALN-014.cisco.com> <20161020225004.GG1074@Vurt.local> <a141faafa05845a1af6417a73aa2f361@XCH-ALN-014.cisco.com> <2894c1eb263143cc8129ec8e381957dc@XCH-ALN-014.cisco.com>
From: Brian Dickson <brian.peter.dickson@gmail.com>
Date: Thu, 20 Oct 2016 17:28:24 -0700
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To: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/65diFkd1NQa-t0YaPmsC5GlTges>
Cc: heasley <heas@shrubbery.net>, IETF IDR WG <idr@ietf.org>, Sue Hares <shares@ndzh.com>
Subject: Re: [Idr] WG LC on draft-ietf-idr-large-community-03.txt (10/17/2016 to 10/31/2016)
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On Thu, Oct 20, 2016 at 4:46 PM, Jakob Heitz (jheitz) <jheitz@cisco.com> wrote: > Perhaps, we should add in an operations section that we should not and > will not go any further. > In particular, within an AS and between adjacent BGP neighbors, ANY values > will be allowed. > The only requirement is that sender and receiver have the same > understanding of the contents, > but no RFC is required to say this. > > Jakob, I think you still don't understand the purpose or the mechanics of communities, as what you say makes almost no sense. The reason "large" needs to be an optional, transitive attribute, is that the intended party, whose ASN is in the Global Administrator field, is not necessarily the first or second party (the one setting the community, or the one that is the BGP peer of the first party). The community may travel an arbitrary number of AS hops before it is received by the ASN in question (global admin). That ASN is the one who is the (ultimate) intended recipient (of the community), and whose interprets the latter 8 octets of the community, using whatever logic he/she wishes. (The prefix will probably propagate much further, but we are only concerned about the ASN that is the global administrator of the community.) This is NOT limited to within an AS, nor to adjacent BGP peers. As such, the intermediate AS hops will receive the prefix with the attached Large Community, but will not have any understanding of the contents. They are expected to pass them along, as this is the necessary part of communities' functioning. A -> X -> Y -> Z -> B are the Autonomous Systems passing the prefix. A sets the community. The community is B:something:something. B interprets the community. X, Y, and Z, pass it along without acting on it. I'm sorry to raise a fuss, but since you are involved in editing the I-D, it would put my mind at ease to hear you say that you understand the above. Putting text into this document, if you don't understand the above, may be harmful to the document, and to operator folks who are trying to get the bugs out of the document before it advances. Sincerely, Brian > Thanks, > Jakob. > > > > -----Original Message----- > > From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Jakob Heitz > (jheitz) > > Sent: Thursday, October 20, 2016 4:06 PM > > To: Job Snijders <job@ntt.net> > > Cc: heasley <heas@shrubbery.net>; Sue Hares <shares@ndzh.com>; IETF IDR > WG <idr@ietf.org> > > Subject: Re: [Idr] WG LC on draft-ietf-idr-large-community-03.txt > (10/17/2016 to 10/31/2016) > > > > Evidently, it wasn't clear. Now it is. > > > > Thanks, > > Jakob. > > > > > > > -----Original Message----- > > > From: Job Snijders [mailto:job@ntt.net] > > > Sent: Thursday, October 20, 2016 3:50 PM > > > To: Jakob Heitz (jheitz) <jheitz@cisco.com> > > > Cc: Jeffrey Haas <jhaas@pfrc.org>; heasley <heas@shrubbery.net>; IETF > IDR WG <idr@ietf.org>; Sue Hares > > > <shares@ndzh.com> > > > Subject: Re: [Idr] WG LC on draft-ietf-idr-large-community-03.txt > (10/17/2016 to 10/31/2016) > > > > > > Hi Jakob, > > > > > > I am not sure what issue this replacement resolves. With the > replacement > > > text in the document I feel I have more questions than answers. > > > > > > Usually a community is intended to be sent to one AS to trigger an > > > action, and to multiple ASes if the community is of informative nature. > > > We know we can attach multiple Large BGP Communities to a route, > because > > > of the variable length of the attribute. > > > > > > In an earlier response I pointed at text that addresses this specific > > > feature already in the current text: https://mailarchive.ietf.org/ > arch/msg/idr/_QULjIUDaBB4JqDR8IXuIYkAVJw > > > > > > Kind regards, > > > > > > Job > > > > > > > > > On Thu, Oct 20, 2016 at 10:13:41PM +0000, Jakob Heitz (jheitz) wrote: > > > > In addition, to deal with the values for the GA field, we will > replace > > > > > > > > The Global Administrator field is intended to allow different > > > > Autonomous Systems to define Large BGP Communities without > collision. > > > > > > > > with > > > > > > > > A Large Community that is intended to be sent to multiple ASes > > > > SHOULD contain an ASN in the Global Administrator field. The ASN > > > > SHOULD be one that is assigned to the entity that defines the > > > > meaning of the rest of the Large Community. This allows a route to > > > > carry multiple Large Communities, the meaning of each being defined > > > > by different independent entities. > > > > _______________________________________________ > > Idr mailing list > > Idr@ietf.org > > https://www.ietf.org/mailman/listinfo/idr > > _______________________________________________ > Idr mailing list > Idr@ietf.org > https://www.ietf.org/mailman/listinfo/idr >
- [Idr] WG LC on draft-ietf-idr-large-community-03.… Susan Hares
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Peter Hessler
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Christopher Morrow
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Jeffrey Haas
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Dickinson, Ian
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Jeff Tantsura
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Wesley George
- Re: [Idr] WG LC on draft-ietf-idr-large-community… heasley
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Job Snijders
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Jeffrey Haas
- Re: [Idr] WG LC on draft-ietf-idr-large-community… t.petch
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Jeffrey Haas
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Jakob Heitz (jheitz)
- Re: [Idr] WG LC on draft-ietf-idr-large-community… David Farmer
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Jeffrey Haas
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Jared Mauch
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Brian Dickson
- Re: [Idr] WG LC on draft-ietf-idr-large-community… David Farmer
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Nick Hilliard
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Jeffrey Haas
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Nick Hilliard
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Jeffrey Haas
- Re: [Idr] WG LC on draft-ietf-idr-large-community… David Farmer
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Robert Raszuk
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Brian Dickson
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Robert Raszuk
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Brian Dickson
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Mikael Abrahamsson
- Re: [Idr] WG LC on draft-ietf-idr-large-community… t.petch
- Re: [Idr] WG LC on draft-ietf-idr-large-community… t.petch
- Re: [Idr] WG LC on draft-ietf-idr-large-community… t.petch
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Mikael Abrahamsson
- Re: [Idr] WG LC on draft-ietf-idr-large-community… bruno.decraene
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Job Snijders
- Re: [Idr] WG LC on draft-ietf-idr-large-community… bruno.decraene
- Re: [Idr] WG LC on draft-ietf-idr-large-community… bruno.decraene
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Job Snijders
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Jeffrey Haas
- Re: [Idr] WG LC on draft-ietf-idr-large-community… t.petch
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Peter Hessler
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Job Snijders
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Job Snijders
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Job Snijders
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Job Snijders
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Job Snijders
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Job Snijders
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Job Snijders
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Jakob Heitz (jheitz)
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Job Snijders
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Jakob Heitz (jheitz)
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Jakob Heitz (jheitz)
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Brian Dickson
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Jakob Heitz (jheitz)
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Brian Dickson
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Jakob Heitz (jheitz)
- Re: [Idr] WG LC on draft-ietf-idr-large-community… t.petch
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Adam Chappell
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Jared Mauch
- Re: [Idr] WG LC on draft-ietf-idr-large-community… i3D.net - Martijn Schmidt
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Robert Raszuk
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Peter Hessler
- Re: [Idr] WG LC on draft-ietf-idr-large-community… heasley
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Robert Raszuk
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Peter Hessler
- Re: [Idr] WG LC on draft-ietf-idr-large-community… i3D.net - Martijn Schmidt
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Robert Raszuk
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Job Snijders
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Robert Raszuk
- Re: [Idr] WG LC on draft-ietf-idr-large-community… i3D.net - Martijn Schmidt
- Re: [Idr] WG LC on draft-ietf-idr-large-community… i3D.net - Martijn Schmidt
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Robert Raszuk
- Re: [Idr] WG LC on draft-ietf-idr-large-community… i3D.net - Martijn Schmidt
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Robert Raszuk
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Brian Dickson
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Paul Jakma
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Brian Dickson
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Julian Seifert
- Re: [Idr] WG LC on draft-ietf-idr-large-community… i3D.net - Martijn Schmidt
- Re: [Idr] WG LC on draft-ietf-idr-large-community… i3D.net - Martijn Schmidt
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Gert Doering
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Gert Doering
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Robert Raszuk
- Re: [Idr] WG LC on draft-ietf-idr-large-community… John Scudder
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Robert Raszuk
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Richard Hartmann
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Brian Dickson
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Joe Provo
- Re: [Idr] WG LC on draft-ietf-idr-large-community… John G. Scudder
- Re: [Idr] WG LC on draft-ietf-idr-large-community… marco
- Re: [Idr] WG LC on draft-ietf-idr-large-community… heasley
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Robert Raszuk
- Re: [Idr] WG LC on draft-ietf-idr-large-community… heasley
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Jakob Heitz (jheitz)
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Brian Dickson
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Nick Hilliard
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Richard A Steenbergen
- Re: [Idr] WG LC on draft-ietf-idr-large-community… t.petch
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Brian Dickson
- Re: [Idr] WG LC on draft-ietf-idr-large-community… David Farmer
- Re: [Idr] WG LC on draft-ietf-idr-large-community… Nick Hilliard
- Re: [Idr] WG LC on draft-ietf-idr-large-community… John G. Scudder