Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to Internet Standard
Ralph Droms <rdroms.ietf@gmail.com> Tue, 24 September 2013 20:44 UTC
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From: Ralph Droms <rdroms.ietf@gmail.com>
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Date: Tue, 24 Sep 2013 21:43:56 +0100
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References: <489D13FBFA9B3E41812EA89F188F018E18654EE6@xmb-rcd-x04.cisco.com> <5212694A.6000807@gmail.com> <CAOv0Pi87akb24PaYJKPzK3+cfCr1DHDu-h2sF3HwTxBvzZC9+w@mail.gmail.com> <C2A9B74C-A52C-4605-824E-40E3E9C190E0@gmail.com> <52305986.2010503@gmail.com>, <FB56FE0A-9088-4040-BCE7-C69399D64171@employees.org> <ECD231FD-8D3F-4067-8BDE-AE567D96F6A7@cisco.com> <52306010.4090001@gmail.com> <5E91E9B8-6E22-46DD-A687-B4983BD0B508@gmail.com> <523f2fa3.c9ed440a.55a9.ffffc38e@mx.google.com> <52402AF3.8010407@gmail.com> <5240486E.20501@gmail.com> <52405701.9070506@gmail.com> <2CC893E4-7C48-4345-A40E-E2B3822C14ED@gmail.com> <5241951B.2070606@gmail.com>
To: Alexandru Petrescu <alexandru.petrescu@gmail.com>
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Cc: "dhcwg@ietf.org WG" <dhcwg@ietf.org>
Subject: Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to Internet Standard
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On Sep 24, 2013, at 2:35 PM 9/24/13, Alexandru Petrescu <alexandru.petrescu@gmail.com> wrote: > Le 24/09/2013 10:32, Ralph Droms a écrit : >> >> On Sep 23, 2013, at 3:58 PM 9/23/13, Alexandru Petrescu >> <alexandru.petrescu@gmail.com> wrote: >> >>> Le 23/09/2013 15:55, Tomek Mrugalski a écrit : >>>> On 23.09.2013 13:50, Alexandru Petrescu wrote: >>>>> Le 22/09/2013 19:57, Leaf Yeh a écrit : >>>>>> Ralph > The piece of network equipment that implements the >>>>>> relay agent routes, and that network equipment *might* also >>>>>> need a route. >>>>>> >>>>>> On the PE router implementing relay for DHCPv6-PD, it always >>>>>> needs add the associated route for the CE's network of >>>>>> delegated prefix. I can't see *might* here. >>>>> >>>>> I agree with the doubt. I don't see a might, but rather a >>>>> must. Otherwise it doesn't work. >>>>> >>>>> But maybe I dont understand the word 'might' as a native >>>>> speaker could hear it. >>>> Relay agent is functionality that can be provided by a piece of >>>> software. You can run it on any box that is connected to more >>>> than one network. Although typically such a box serves as a >>>> router, it doesn't have to. >>> >>> You mean a Relay agent which runs on a pure Host (single real >>> interface, no additional virtual/real interfaces)? >>> >>> Even in that case it (or the Router on the same link which is >>> connected to the Internet) will need to install a route towards >>> the Requesting Router's interface for the delegated prefix. >> >> And there's the exact point of the discussion - if the relay agent >> is not implemented on the router that needs the route, passing the >> route in the DHCPv6 message exchange through the relay agent won't >> get the route to the appropriate router. >> >>> >>> In all cases, the Relay and other routers on that link MUST >>> install a route. >> >> And how does that route get to the other routers? > > They are all on the same link, and one mechanism used to install routes > dynamically is during ICMP Redirect. According to RFC 4861, sec. 8.2, routers ignore ICMPv6 Redirect messages: A router MUST NOT update its routing tables upon receipt of a Redirect. I don't recall if that text is updated by subsequent RFCs. > >>> Whether they do it at allocation time, at ICMP Redirect time, or >>> at manual config time - is another matter. >> >> I'm not saying the route installation can't be accomplished through >> DHCPv6. I think you'll need to address the specific issues I raised >> in previous e-mail to publish a specification for passing routing >> information to the appropriate router through a DHCPv6 message >> exchange with a host. > > Ok, my point is whether or not we could formulate a problem statement > for this: there is a need for a route in the concerned routers, after > the PD operation. Without that route the communication can't be > established between Hosts configured with an address prefixed by the > delegated prefix. I agree that there is a need for the route to exist and an appropriate problem statement could be formulated. - Ralph > > Alex > >> >> - Ralph >> >>> >>> Without that route the whole schmillblick doesn't work. >>> >>> Alex >>> >>> >>> _______________________________________________ dhcwg mailing list >>> dhcwg@ietf.org https://www.ietf.org/mailman/listinfo/dhcwg >> >> >> > >
- [dhcwg] Advancing RFC 3315 and RFC 3633 to Intern… Bernie Volz (volz)
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Tomek Mrugalski
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Alexandru Petrescu
- [dhcwg] Fwd: Advancing RFC 3315 and RFC 3633 to I… Alexandru Petrescu
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Ralph Droms
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Alexandru Petrescu
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Ole Troan
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Alexandru Petrescu
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Bernie Volz (volz)
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Alexandru Petrescu
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Ralph Droms
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Ralph Droms
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Leaf Yeh
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Leaf Yeh
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Ole Troan
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Alexandru Petrescu
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Tomek Mrugalski
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Alexandru Petrescu
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Ralph Droms
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Leaf Yeh
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Leaf Yeh
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Bernie Volz (volz)
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Ralph Droms
- Re: [dhcwg] errata to RFC 3633: s/provider edge r… Alexandru Petrescu
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Alexandru Petrescu
- Re: [dhcwg] errata to RFC 3633: s/provider edge r… Ralph Droms
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Leaf Yeh
- Re: [dhcwg] discussion about PD-Relay-route Alexandru Petrescu
- Re: [dhcwg] Advancing RFC 3315 and RFC 3633 to In… Ralph Droms
- Re: [dhcwg] discussion about PD-Relay-route Leaf Yeh
- Re: [dhcwg] discussion about PD-Relay-route Alexandru Petrescu
- Re: [dhcwg] RFC 3633 to Internet Standard Alexandru Petrescu
- Re: [dhcwg] discussion about PD-Relay-route Alexandru Petrescu
- Re: [dhcwg] discussion about PD-Relay-route Leaf Yeh
- Re: [dhcwg] RFC 3633 to Internet Standard Ralph Droms
- Re: [dhcwg] discussion about PD-Relay-route Tomek Mrugalski
- Re: [dhcwg] discussion about PD-Relay-route Alexandru Petrescu
- Re: [dhcwg] RFC 3633 to Internet Standard Alexandru Petrescu
- Re: [dhcwg] RFC 3633 to Internet Standard Leaf Yeh
- Re: [dhcwg] RFC 3633 to Internet Standard Ralph Droms