Re: [dhcwg] MTU option for DHCPv6?
Alexandre Petrescu <alexandre.petrescu@gmail.com> Thu, 28 July 2016 17:27 UTC
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To: Lorenzo Colitti <lorenzo@google.com>
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From: Alexandre Petrescu <alexandre.petrescu@gmail.com>
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Date: Thu, 28 Jul 2016 19:27:37 +0200
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Subject: Re: [dhcwg] MTU option for DHCPv6?
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Le 28/07/2016 à 17:23, Lorenzo Colitti a écrit : > Alexandre, that doesn't make sense. The only specified mechanism for > IPv6 on 3GPP links is RAs. I would doubt so. I think DHCPv6 is there in the 3GPP specs too. > There is no Ethernet on cellular links, where did you get that from? From packet dumps, looking at the headers. > The fact that the host can configure lots of addresses is a feature, not > a bug. It makes useful features like /64 sharing possible. It were a feature _if_ forwarding were associated with it upon allocation. But that /64 is advertised as on-link (no routing associated with it), as if there were 2^64 neighbors on that link; there are only two. As such it is over-provisioining, not a feature. It is a feature in which it invites for 64share, which when looked at closely is a hack. It is a bug when the Host configures so many IPv6 addresses on its interface. It's looking like getting out of hand. Alex > > On Fri, Jul 29, 2016 at 12:19 AM, Alexandre Petrescu > <alexandre.petrescu@gmail.com <mailto:alexandre.petrescu@gmail.com>> wrote: > > On point to point links like cellular, RA makes little sense, is not > specified formally (IPv6-over-Ethernet-over-cellular) and is cause > of incompatibility issues; when used as part of SLAAC with privacy > address concepts the RA was witnessed to result in huge number of > addresses self-configured. > > The INFORMATIONAL 64share is another result of using wrongly RAs on > ptp links. > > These things dont happen with ppp or DHCP which are more adapted to > ptp links like cellular. > > Alex > > Le 28/07/2016 à 17:10, Templin, Fred L a écrit : > > RA doesn’t provide nearly the same configuration flexibility as > DHCPv6. > RA also > > doesn’t have Rebind/Renew/Release messags that can be used to manage > > mobiole devices. And, RA also does not have DHCPv6 Security. (RA > does have > > SEND, but I have not heard of that as being widely deployed). > Finally, > RA does > > not have the back-end database management capabilities that are > built into > > common public domain DHCPv6 implementations. > > > > Thanks – Fred > > fred.l.templin@boeing.com <mailto:fred.l.templin@boeing.com> > > > > *From:*Lorenzo Colitti [mailto:lorenzo@google.com > <mailto:lorenzo@google.com>] > *Sent:* Thursday, July 28, 2016 7:57 AM > *To:* Bernie Volz (volz) <volz@cisco.com <mailto:volz@cisco.com>> > *Cc:* otroan@employees.org <mailto:otroan@employees.org>; Ian > Farrer <ianfarrer@gmx.com <mailto:ianfarrer@gmx.com>>; Templin, > Fred L <Fred.L.Templin@boeing.com > <mailto:Fred.L.Templin@boeing.com>>; <dhcwg@ietf.org > <mailto:dhcwg@ietf.org>> <dhcwg@ietf.org <mailto:dhcwg@ietf.org>> > *Subject:* Re: [dhcwg] MTU option for DHCPv6? > > > > On Thu, Jul 28, 2016 at 10:52 PM, Bernie Volz (volz) > <volz@cisco.com <mailto:volz@cisco.com> > <mailto:volz@cisco.com <mailto:volz@cisco.com>>> wrote: > > And, note that Fred had indicated "I'm operating on a link > where I > don't need to get any configuration information from RS/RA - > everything comes from DHCPv6." So, looks like at least he wants > DHCPv6 option(s). > > > > Yes, but it doesn't have to be that way. Sending an RA would > work just > as well. Like all RA parameters, it also has the advantage that > it is > easier to update dynamically if needed. Doing that in DHCPv6 is more > difficult, because at least as of RFC3315bis, it looks like > reconfigure > messages MUST be discarded if they do not include authentication. > > > > _______________________________________________ > dhcwg mailing list > dhcwg@ietf.org <mailto:dhcwg@ietf.org> > https://www.ietf.org/mailman/listinfo/dhcwg > > > _______________________________________________ > dhcwg mailing list > dhcwg@ietf.org <mailto:dhcwg@ietf.org> > https://www.ietf.org/mailman/listinfo/dhcwg > >
- Re: [dhcwg] MTU option for DHCPv6? Templin, Fred L
- [dhcwg] MTU option for DHCPv6? Templin, Fred L
- Re: [dhcwg] MTU option for DHCPv6? Bernie Volz (volz)
- Re: [dhcwg] MTU option for DHCPv6? Lorenzo Colitti
- Re: [dhcwg] MTU option for DHCPv6? Templin, Fred L
- Re: [dhcwg] MTU option for DHCPv6? Lorenzo Colitti
- Re: [dhcwg] MTU option for DHCPv6? Alexandre Petrescu
- Re: [dhcwg] MTU option for DHCPv6? Lorenzo Colitti
- Re: [dhcwg] MTU option for DHCPv6? Alexandre Petrescu
- Re: [dhcwg] MTU option for DHCPv6? Alexandre Petrescu
- Re: [dhcwg] MTU option for DHCPv6? Lorenzo Colitti
- Re: [dhcwg] MTU option for DHCPv6? Alexandre Petrescu
- Re: [dhcwg] MTU option for DHCPv6? Templin, Fred L
- Re: [dhcwg] MTU option for DHCPv6? Simon Hobson
- Re: [dhcwg] MTU option for DHCPv6? Templin, Fred L
- Re: [dhcwg] MTU option for DHCPv6? Templin, Fred L
- Re: [dhcwg] MTU option for DHCPv6? Lorenzo Colitti
- Re: [dhcwg] MTU option for DHCPv6? Templin, Fred L
- Re: [dhcwg] MTU option for DHCPv6? Templin, Fred L
- Re: [dhcwg] MTU option for DHCPv6? Bernie Volz (volz)
- Re: [dhcwg] MTU option for DHCPv6? Templin, Fred L
- Re: [dhcwg] MTU option for DHCPv6? Lorenzo Colitti
- Re: [dhcwg] MTU option for DHCPv6? Bernie Volz (volz)
- Re: [dhcwg] MTU option for DHCPv6? otroan
- Re: [dhcwg] MTU option for DHCPv6? Ian Farrer
- Re: [dhcwg] MTU option for DHCPv6? Templin, Fred L
- Re: [dhcwg] MTU option for DHCPv6? Bernie Volz (volz)