Re: [Isis-wg] Fwd: New Version Notification for draft-franke-isis-over-ipv6-00.txt
Donald Eastlake <d3e3e3@gmail.com> Mon, 23 November 2015 05:09 UTC
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From: Donald Eastlake <d3e3e3@gmail.com>
Date: Mon, 23 Nov 2015 00:09:35 -0500
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To: Christian Franke <chris@opensourcerouting.org>
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Subject: Re: [Isis-wg] Fwd: New Version Notification for draft-franke-isis-over-ipv6-00.txt
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Hi, In order to be able to treat an IP network as a link type between TRILL routers, TRILL needs to be able to send TRILL IS-IS packets between TRILL routers in a manner that does not interact with use of IS-IS within the IP network. So I've thought a fair amount about IS-IS over IP. There has been a TRILL WG draft on this for some time. I think you are right that the correct thing for IPv6 is to use the port's IPv6 address as the SNPA. Your isis-over-ipv6 draft says that SNPAs don't occur on the wire, just within IS-IS routers. But I believe they occur in IS-IS Hellos. See TLV #6, referred to as "IIS Neighbors" in IANA's TLV table and shown in ISO/IEC 10589-2002 Second Edition in Clause 9.5, item "a", page 68. I just checked and that IS-IS TLV is specified as being limited to 48-bit SNPAs. Looking further, the ISO/IEC standard seems to have a TLV #7, shown in item "b" on that page for specifying neighbor SNPAs and that TLV #7 does have an SNPA length field so they could be some other length. Maybe I'm confused, but, it appears that the IETF has re-assigned TLV #7 to be Instance Identifier (RFC6822). Since you say there are interoperable implementations of your draft, am I confused or do they have some solution to the above problem? Perhaps, since Hellos are link local, the implementations just use fixed size 128-bit SNPAs in their IIS Neighbors TLVs over IPv6, contrary to the ISO specification, and this was left out of the draft? (This is not a problem for TRILL over IP as TRILL uses the TRILL Neighbor TLV (#145, RFC 7176) which does provide an SNPA length field.) Thanks, Donald ============================= Donald E. Eastlake 3rd +1-508-333-2270 (cell) 155 Beaver Street, Milford, MA 01757 USA d3e3e3@gmail.com On Fri, Jul 3, 2015 at 2:50 PM, Christian Franke <chris@opensourcerouting.org> wrote: > Dear all, > > In this new draft, I'd like to propose an alternative method to transmit > IS-IS PDUs. By using IPv6 as transport, it makes the protocol less > dependent on specific link-layers. > > There are two interoperable free software implementations for this which > will be published until the IETF in Prague and which will be presented > there during Bits-N-Bites. > > I'd be happy to receive your feedback. > > -Christian > > -------- Forwarded Message -------- > Subject: New Version Notification for draft-franke-isis-over-ipv6-00.txt > Date: Fri, 03 Jul 2015 11:27:10 -0700 > From: internet-drafts@ietf.org > To: Christian Franke <chris@opensourcerouting.org>, Christian Franke > <chris@opensourcerouting.org> > > > A new version of I-D, draft-franke-isis-over-ipv6-00.txt > has been successfully submitted by Christian Franke and posted to the > IETF repository. > > Name: draft-franke-isis-over-ipv6 > Revision: 00 > Title: IS-IS over IPv6 > Document date: 2015-07-03 > Group: Individual Submission > Pages: 5 > URL: > https://www.ietf.org/internet-drafts/draft-franke-isis-over-ipv6-00.txt > Status: > https://datatracker.ietf.org/doc/draft-franke-isis-over-ipv6/ > Htmlized: https://tools.ietf.org/html/draft-franke-isis-over-ipv6-00 > > > Abstract: > In this draft, a method to transmit IS-IS PDUs as IPv6 packets is > described. While the default encapsulation of IS-IS is specified > directly on top of the link-layer, making it necessary for IS-IS to > be specified for each link-layer it should be used on, the proposed > method allows for IS-IS to run on any link-layers supporting IPv6. > > > > > > Please note that it may take a couple of minutes from the time of submission > until the htmlized version and diff are available at tools.ietf.org. > > The IETF Secretariat > > > > > > _______________________________________________ > Isis-wg mailing list > Isis-wg@ietf.org > https://www.ietf.org/mailman/listinfo/isis-wg >
- [Isis-wg] Fwd: New Version Notification for draft… Christian Franke
- Re: [Isis-wg] Fwd: New Version Notification for d… Karsten Thomann
- Re: [Isis-wg] Fwd: New Version Notification for d… Christian Franke
- Re: [Isis-wg] Fwd: New Version Notification for d… prz
- Re: [Isis-wg] Fwd: New Version Notification for d… Karsten Thomann
- Re: [Isis-wg] Fwd: New Version Notification for d… Christian Franke
- Re: [Isis-wg] Fwd: New Version Notification for d… Karsten Thomann
- Re: [Isis-wg] Fwd: New Version Notification for d… Christian Franke
- Re: [Isis-wg] Fwd: New Version Notification for d… Karsten Thomann
- Re: [Isis-wg] Fwd: New Version Notification for d… Marc Binderberger
- Re: [Isis-wg] Fwd: New Version Notification for d… prz
- Re: [Isis-wg] Fwd: New Version Notification for d… Donald Eastlake