Re: [dhcwg] DHCPv6 and IPv6ND
Alexandru Petrescu <alexandru.petrescu@gmail.com> Thu, 16 November 2017 11:50 UTC
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To: mohamed.boucadair@orange.com
Cc: Ted Lemon <mellon@fugue.com>, dhcwg <dhcwg@ietf.org>, "Bernie Volz (volz)" <volz@cisco.com>
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From: Alexandru Petrescu <alexandru.petrescu@gmail.com>
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Date: Thu, 16 Nov 2017 12:49:52 +0100
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Subject: Re: [dhcwg] DHCPv6 and IPv6ND
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Med, Thank you for the reply. I agree with some parts, but not with others. Le 16/11/2017 à 12:25, mohamed.boucadair@orange.com a écrit : > Re-, > > Please see inline. > > Cheers, > Med > >> -----Message d'origine----- >> De : Alexandru Petrescu [mailto:alexandru.petrescu@gmail.com] >> Envoyé : jeudi 16 novembre 2017 12:05 >> À : BOUCADAIR Mohamed IMT/OLN >> Cc : Ted Lemon; dhcwg; Bernie Volz (volz) >> Objet : Re: [dhcwg] DHCPv6 and IPv6ND >> >> Med, >> Which part do you disagree with in my text? >> >> I agree the problems are indeed implementation problems, > > [Med] Cool. > > but I need to >> understand which part do you disagree? >> > > [Med] I disagree that the spec needs to say that the port number is variable. This should be left to implementers, if neede. BTW, configuring a distinct port number will require that the client is able to learn that alternate port. This will lead to more interoperability problems than it solves. > >> Do you disagree when I say that the entire issue about making DHCPv6 >> work on 3GPP should be forgotten? > > [Med] Prefix delegation can work easily in cellular networks if all involved parties/implementers are following current specs. That is: > - The client uses the defined multicast address + service port when issuing its solicit messages + supply prefix_exclude. > - The server listens on the service port + does not make any assumption about the source IP address + treat DUIDs as opaque values that are only used to compare equality. I think after all this time we can safely say that the specification written above has never been experimented successfully. YEs, my ARM runs DHCPv6-PD with all the options that you required. Yes, the operator DHCPv6 Server is running and configured to do PD a /56. But no, the two have never performed a successful exchange. The problem is in the middle - the modem. It's not only me who says this. Lorenzo complained about modems and DHCPv6 several years ago. Others on the v6ops WG agreed with him. Yes, they made a wrong assertion saying the operator does not support DHCPv6: the operator _can_ do DHCPv6, and the assertion was wrong. > I'm aware that some messages are "blocked" by some chipset vendors, but again this is an implementation issue. I checked Qualcomm and Balong modems. That represents quite a lot of the installed base. I will be happy to check others like Intel modems, but I dont know how. There is also a possibility that the specification that you write above, and where you refer to involved parties: maybe it's a matter between operator, implementers at router manufacturer and implementers at modem manufacturer. I do not represent any: just implementer of open source. A modem implementer has access to source code of the modem. A router manufacturer implementer has access to source code of router. Alex > I do agree with you it is frustrating. Yes. Alex > > Or other part? >> >> Alex >> >> Le 16/11/2017 à 11:08, mohamed.boucadair@orange.com a écrit : >>> Hi Alex, >>> >>> I disagree. >>> >>> The problems you are describing are implementation ones. >>> >>> Cheers, >>> Med >>> >>>> -----Message d'origine----- >>>> De : dhcwg [mailto:dhcwg-bounces@ietf.org] De la part de Alexandru >>>> Petrescu >>>> Envoyé : jeudi 16 novembre 2017 07:38 >>>> À : Ted Lemon >>>> Cc : dhcwg; Bernie Volz (volz) >>>> Objet : Re: [dhcwg] DHCPv6 and IPv6ND >>>> >>>> >>>> >>>> Le 16/11/2017 à 06:29, Ted Lemon a écrit : >>>>> I'm having trouble figuring out how changing the port would help. >>>>> You'd still have to make the same modifications. You'd still have >>>>> to define a business model. >>>> >>>> _If_ there is a standard that says port number is variable, and if >>>> hardware manufacturer implements it, then it will help. >>>> >>>> If not, not. >>>> >>>> If so, this entire issue about making DHCPv6 work on 3GPP networks >>>> should be forgotten. It's impossible to make it work. >>>> >>>> That puts the discussion of DHCPv6 and IPv6ND outside the 3GPP context >>>> altogether. >>>> >>>> For the business model: I am not an economist. >>>> >>>> Alex >>>> >>>>> >>>>> >>>> >>>> _______________________________________________ >>>> dhcwg mailing list >>>> dhcwg@ietf.org >>>> https://www.ietf.org/mailman/listinfo/dhcwg
- [dhcwg] DHCPv6 and IPv6ND Templin, Fred L
- Re: [dhcwg] DHCPv6 and IPv6ND Ted Lemon
- Re: [dhcwg] DHCPv6 and IPv6ND Templin, Fred L
- Re: [dhcwg] DHCPv6 and IPv6ND Ted Lemon
- Re: [dhcwg] DHCPv6 and IPv6ND Templin, Fred L
- Re: [dhcwg] DHCPv6 and IPv6ND Masataka Ohta
- Re: [dhcwg] DHCPv6 and IPv6ND Ted Lemon
- Re: [dhcwg] DHCPv6 and IPv6ND Alexandre Petrescu
- Re: [dhcwg] DHCPv6 and IPv6ND Ted Lemon
- Re: [dhcwg] DHCPv6 and IPv6ND Alexandre Petrescu
- Re: [dhcwg] DHCPv6 and IPv6ND Ted Lemon
- Re: [dhcwg] DHCPv6 and IPv6ND Alexandru Petrescu
- Re: [dhcwg] DHCPv6 and IPv6ND Ted Lemon
- Re: [dhcwg] DHCPv6 and IPv6ND Alexandre Petrescu
- Re: [dhcwg] DHCPv6 and IPv6ND Ted Lemon
- Re: [dhcwg] DHCPv6 and IPv6ND Alexandre Petrescu
- Re: [dhcwg] DHCPv6 and IPv6ND Bernie Volz (volz)
- Re: [dhcwg] DHCPv6 and IPv6ND Alexandru Petrescu
- Re: [dhcwg] DHCPv6 and IPv6ND Ted Lemon
- Re: [dhcwg] DHCPv6 and IPv6ND Alexandre Petrescu
- Re: [dhcwg] DHCPv6 and IPv6ND Ted Lemon
- Re: [dhcwg] DHCPv6 and IPv6ND Bernie Volz (volz)
- Re: [dhcwg] DHCPv6 and IPv6ND Alexandru Petrescu
- Re: [dhcwg] DHCPv6 and IPv6ND Ted Lemon
- Re: [dhcwg] DHCPv6 and IPv6ND Bernie Volz (volz)
- Re: [dhcwg] DHCPv6 and IPv6ND mohamed.boucadair
- Re: [dhcwg] DHCPv6 and IPv6ND Alexandru Petrescu
- Re: [dhcwg] DHCPv6 and IPv6ND mohamed.boucadair
- Re: [dhcwg] DHCPv6 and IPv6ND Alexandru Petrescu
- Re: [dhcwg] DHCPv6 and IPv6ND mohamed.boucadair
- Re: [dhcwg] DHCPv6 and IPv6ND Alexandru Petrescu
- Re: [dhcwg] DHCPv6 and IPv6ND Templin, Fred L