Re: Comments on draft-katz-yeung-traffic-08.txt
Tom Petch <nwnetworks@DIAL.PIPEX.COM> Fri, 25 October 2002 18:59 UTC
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Date: Fri, 25 Oct 2002 19:53:54 +0100
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From: Tom Petch <nwnetworks@DIAL.PIPEX.COM>
Subject: Re: Comments on draft-katz-yeung-traffic-08.txt
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Before the multi-access issue is declared closed I believe there should be an agreed definition of what multi-access means in this context. Because in an OSPF context ie RFC2328 (which is where I am coming from), the term multi-access has now largely disappeared. The terminology is either 'Broadcast' or 'Non-Broadcast MultiAccess' and both are defined as (p.9) ' Networks supporting many (more than two) attached routers' So what is a two router only multi-access network? Nothing to do with OSPF :-( And this is a can of worms because RFC2328 seems not to allow a DR on two router networks while certain manufacturers of routers do (and I even see LSA with a DR when there is only one of those manufacturers' routers active!). Here, by implication, from the TLV definition in this draft, multiaccess means a network with a DR. And then there are other nasties like NBMA networks which lose full connectivity and so should stop having a DR! Tom Petch -----Original Message----- From: Acee Lindem <acee@REDBACK.COM> To: OSPF@DISCUSS.MICROSOFT.COM <OSPF@DISCUSS.MICROSOFT.COM> Date: 22 October 2002 21:30 Subject: Re: Comments on draft-katz-yeung-traffic-08.txt >Kireeti, > >Can we close on the remaining issues? > > 1. With respect to the Remote Interface IP Addres TLV, is > there really any reason to include it with a value of 0.0.0.0 > for a multi-access link? I can't see how there could be > a compatibility issue since the rough count on the list > revealed more implementations that omitted the TLV > altogether. > > 2. With respect to more than two routers on a multi-access > network, it seems there is considerable support for > allowing this even though it is not fully specified. > Could you add something along these lines to the second > paragraph of the limitations section: > > "Operation over multiaccess links with more than two > devices is not specifically prohibited. TE operation > and the use of reservation state is a matter for > further study". > > >Thanks, >Acee > > > > >Kireeti Kompella wrote: > >> Hi Acee, >> >> On Thu, 17 Oct 2002, Acee Lindem wrote: >> >> >>>Comments: >>> >>> - The LSA Header Diagram in section 2.3.1 does not reflect >>> the fact that the instance has been extended to 24 bits. >>> >> >> Thanks. Someone else also pointed this out. >> >> >>> - Section 2.4.1 - Replace "but for obvious reasons this..." >>> with "but this nomenclature is avoid here since the >>> OSPF router ID is not necessarily a routable address." >>> >> >> Any objections? If not, I will make this change. >> >> >>> - Section 2.5.4 - Why 0.0.0.0 for the remote address for >>> multiaccess links? It seems the TLV should either be >>> omitted or set to the single neighbor address (since >>> section 1.2 limits traffic engineering to multiaccess >>> networks with 2 devices). >>> >> >> While this document doesn't work ideally for multipoint links with >> more that 2 devices, it is used. Also, this has been implemented >> and is running code, so changing the spec to omitting this TLV at >> this point would cause more problems than it would solve. >> >> >>>Suggestion: >>> >>> - Include "Implications on Graceful Restart" section >>> similar to draft-ietf-ccamp-ospf-gmpls-extensions-08.txt. >>> Explicitly state that the goal is to maintain >>> existing traffic engineered paths while discouraging >>> any new ones until reservation state is obtained. >>> >> >> Instead, how about specifying explicitly in the ospf gmpls draft >> that the text there applies to the base TE doc as well as the GMPLS >> extensions? Otherwise, draft-katz-yeung-traffic-08.txt will need >> the graceful restart doc as a normative reference. Note that the >> TE doc has been around for many years, with interoperable >> implementations etc., while graceful restart for OSPF much more recent. >> >> BTW, can we start to progress the graceful restart (aka hitless >> restart) document? There are interoperable implementations now, and >> while this doc is not as mature as TE, it certainly seems ready .... >> >> Kireeti. >> >> > > >-- >Acee
- Comments on draft-katz-yeung-traffic-08.txt Acee Lindem
- Re: Comments on draft-katz-yeung-traffic-08.txt Kireeti Kompella
- Re: Comments on draft-katz-yeung-traffic-08.txt Rohit Dube
- Re: Comments on draft-katz-yeung-traffic-08.txt Acee Lindem
- Re: Comments on draft-katz-yeung-traffic-08.txt Don Goodspeed
- Re: Comments on draft-katz-yeung-traffic-08.txt Don Goodspeed
- Re: Comments on draft-katz-yeung-traffic-08.txt Tony Przygienda
- Re: Comments on draft-katz-yeung-traffic-08.txt Rohit Dube
- Re: Comments on draft-katz-yeung-traffic-08.txt Naidu, Venkata
- Re: Comments on draft-katz-yeung-traffic-08.txt Naiming Shen
- Re: Comments on draft-katz-yeung-traffic-08.txt Rohit Dube
- Re: Comments on draft-katz-yeung-traffic-08.txt Sina Mirtorabi
- Re: Comments on draft-katz-yeung-traffic-08.txt Rohit Dube
- Re: Comments on draft-katz-yeung-traffic-08.txt Sina Mirtorabi
- Re: Comments on draft-katz-yeung-traffic-08.txt Rohit Dube
- Re: Comments on draft-katz-yeung-traffic-08.txt Li, Ke Qin (Peter)
- Re: Comments on draft-katz-yeung-traffic-08.txt Sina Mirtorabi
- Re: Comments on draft-katz-yeung-traffic-08.txt Rohit Dube
- Re: Comments on draft-katz-yeung-traffic-08.txt Naidu, Venkata
- Re: Comments on draft-katz-yeung-traffic-08.txt Acee Lindem
- Re: Comments on draft-katz-yeung-traffic-08.txt Kireeti Kompella
- Re: Comments on draft-katz-yeung-traffic-08.txt Acee Lindem
- Re: Comments on draft-katz-yeung-traffic-08.txt Kireeti Kompella
- Re: Comments on draft-katz-yeung-traffic-08.txt Acee Lindem
- Re: Comments on draft-katz-yeung-traffic-08.txt Don Goodspeed
- Re: Comments on draft-katz-yeung-traffic-08.txt Tom Petch
- Re: Comments on draft-katz-yeung-traffic-08.txt Acee Lindem
- Re: Comments on draft-katz-yeung-traffic-08.txt Tom Petch
- Re: Comments on draft-katz-yeung-traffic-08.txt Acee Lindem
- Re: OSPFv3 Applications Support Rohit Dube
- Re: OSPFv3 Applications Support Quaizar Vohra
- Re: OSPFv3 Applications Support Acee Lindem
- Re: OSPFv3 Applications Support Erblichs
- Re: OSPFv3 Applications Support Kunihiro Ishiguro
- Re: OSPFv3 Applications Support Kireeti Kompella
- Re: OSPFv3 Applications Support Acee Lindem
- Re: I-D ACTION:draft-katz-yeung-ospf-traffic-10.t… Rohit Dube