Re: [Roll-bier-dt] roll-bier-dt
"Pascal Thubert (pthubert)" <pthubert@cisco.com> Fri, 19 October 2018 13:20 UTC
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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: Toerless Eckert <tte@cs.fau.de>
CC: Carsten Bormann <cabo@tzi.org>, "roll-bier-dt@ietf.org"
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Thread-Topic: [Roll-bier-dt] roll-bier-dt
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Subject: Re: [Roll-bier-dt] roll-bier-dt
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Sure, but the mystery to me is what goes transported with BIER. Because that is the heart of the problem we are facing in this DT. If BIER transports a same IP packet to multiple destinations, then they must all accept the same packet. Moreover, if the destination is not the router indicated by the bit but a neighbor or a set of neighbors to that router, then the inner packet must indicate that. All in all, that tells me that the transported packet is IP multicast. What do I miss? Take care, Pascal > -----Original Message----- > From: Toerless Eckert <tte@cs.fau.de> > Sent: vendredi 19 octobre 2018 15:14 > To: Pascal Thubert (pthubert) <pthubert@cisco.com> > Cc: Carsten Bormann <cabo@tzi.org>rg>; roll-bier-dt@ietf.org > Subject: Re: [Roll-bier-dt] roll-bier-dt > > On Fri, Oct 19, 2018 at 12:36:06PM +0000, Pascal Thubert (pthubert) wrote: > > Hello Toerless: > > > > Well, there is as Carsten says a multicast support for RPL storing mode, but not > for non-storing. This is where Carsten's draft comes in to play. > > Sure. As said, i may not have correctly captured what Mcr was explaining, > > > In normal BIER, the bits indicate the routers, don't they? So there's an IP > packet inside, correct, like in my tunnel mode? But then I expect it is the same > packet for all destinations. So how does htat work, is it a mcast packet or do all > the destination have a same IP address? > > "Proper BIER" (TM) (the stuff done by BIER-WG) has defined its own > encapsulation header (RFC8296) that sits on top of MPLS or ethernet and that > has its own next-proto field/registry, so it can be followed by IP or anything else > that BIER-WG feels deserves a code point in that registry. > > Cheers > Toerless > > > Pascal > > > > > -----Original Message----- > > > From: Roll-bier-dt <roll-bier-dt-bounces@ietf.org> On Behalf Of > > > Toerless Eckert > > > Sent: vendredi 19 octobre 2018 14:21 > > > To: Carsten Bormann <cabo@tzi.org> > > > Cc: roll-bier-dt@ietf.org > > > Subject: Re: [Roll-bier-dt] roll-bier-dt > > > > > > That was me taking notes what Michael said, and maybe i didn't > > > transcribe it correctly. Hope Michael is subscribed here to answer. > > > > > > I think i was more wondering about the suport of compressed IP > > > multicast headders in 6LowPan because that is unclear to me and we > > > probably need to take one of the DT meetings to detail more what > > > extensions we need to do for 6LowPan to support BIER. > > > > > > Cheers > > > Toerless > > > > > > On Fri, Oct 19, 2018 at 07:45:50AM +0200, Carsten Bormann wrote: > > > > On Oct 19, 2018, at 04:56, Toerless Eckert <tte@cs.fau.de> wrote: > > > > > > > > > > https://raw.githubusercontent.com/toerless/roll-bier/master/note > > > > > s/18 > > > > > 1017-roll-bier-notes.txt > > > > > > > > What do you mean with ???RPL does not support multicast.???? MOP=3? > > > > (That is of course storing mode only, and storing mode doesn???t > > > > exist :-), so > > > you have a point. > > > > That???s why we did ccast, to fill in multicast for non-storing > > > > mode.) > > > > > > > > Grüße, Carsten > > > > > > -- > > > --- > > > tte@cs.fau.de > > > > > > _______________________________________________ > > > Roll-bier-dt mailing list > > > Roll-bier-dt@ietf.org > > > https://www.ietf.org/mailman/listinfo/roll-bier-dt > > -- > --- > tte@cs.fau.de
- [Roll-bier-dt] roll-bier-dt Toerless Eckert
- Re: [Roll-bier-dt] roll-bier-dt Carsten Bormann
- Re: [Roll-bier-dt] roll-bier-dt Toerless Eckert
- Re: [Roll-bier-dt] roll-bier-dt Pascal Thubert (pthubert)
- Re: [Roll-bier-dt] roll-bier-dt Toerless Eckert
- Re: [Roll-bier-dt] roll-bier-dt Pascal Thubert (pthubert)
- Re: [Roll-bier-dt] roll-bier-dt Toerless Eckert
- Re: [Roll-bier-dt] roll-bier-dt Pascal Thubert (pthubert)
- Re: [Roll-bier-dt] roll-bier-dt Greg Shepherd
- Re: [Roll-bier-dt] roll-bier-dt Tony Przygienda