Re: [Autoconf] Using DHCPv6 without link-local? Support only EUI-64interfaces?
Teco Boot <teco@inf-net.nl> Sat, 31 July 2010 13:56 UTC
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From: Teco Boot <teco@inf-net.nl>
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Date: Sat, 31 Jul 2010 15:56:58 +0200
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To: "Templin, Fred L" <Fred.L.Templin@boeing.com>
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Subject: Re: [Autoconf] Using DHCPv6 without link-local? Support only EUI-64interfaces?
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Fred, Do you mean DHCP relay can be used on a node, that request an address for itself? I think it could work this way: 1) Node queries with link-local to All_DHCP_Relay_Agents_and_Servers. 2a) Node acts as also relay and queries with ULA (site-local) to All_DHCP_Servers. 2b) If node is provisioned with DHCP server unicast address, it could use that instead of All_DHCP_Servers. I think this is in line with your RFC 5558. Drawback of 1: it can result in high number of relayed DHCP packets, in case of many neighbors. Another drawback of 1: there is a timeout delay when there is no relay or server at one hop. For 2a: the network needs multicast support. Could be SMF. For both 2a and 2b: a temporally used unicast address must be routable. So this DHCP mechanism can only be used as a second step, moving from the self-generated address to a centrally managed address. Teco Op 30 jul 2010, om 17:40 heeft Templin, Fred L het volgende geschreven: > Teco, > >> -----Original Message----- >> From: autoconf-bounces@ietf.org [mailto:autoconf-bounces@ietf.org] On Behalf Of Teco Boot >> Sent: Friday, July 30, 2010 4:58 AM >> To: autoconf@ietf.org autoconf@ietf.org >> Subject: [Autoconf] Using DHCPv6 without link-local? Support only EUI-64interfaces? >> >> RFC3315: >> ... The client >> MUST use a link-local address assigned to the interface for which it >> is requesting configuration information as the source address in the >> header of the IP datagram. >> >> Question: can we get around a MUST in a standards track RFC? >> I don't think so. > > If the MANET router only behaves as a client on an internal > link (e.g., a loopback) but behaves as a relay on its MANET > interfaces, then link-locals need not be exposed for DHCPv6 > purposes. There are other reasons why link-locals might need > to be considered for MANETs, but I'm not sure this is one > of them. > > Fred > fred.l.templin@boeing.com > >> The to be posted proposed text for to be RFC5889 would say that if link-locals are used, there are >> potential problems when using other than modified EUI-64 IIDs, and therefore must be based on >> modified EUI-64 IIDs. >> >> Second question, on first item in charter: do we limit ourself to MANET routers that has modified >> EUI-64 link-locals? >> I think: better think twice. >> >> Opinions? >> >> Teco. >> >> >> _______________________________________________ >> Autoconf mailing list >> Autoconf@ietf.org >> https://www.ietf.org/mailman/listinfo/autoconf
- [Autoconf] Using DHCPv6 without link-local? Suppo… Teco Boot
- Re: [Autoconf] Using DHCPv6 without link-local? S… Dearlove, Christopher (UK)
- Re: [Autoconf] Using DHCPv6 without link-local? S… Templin, Fred L
- Re: [Autoconf] Using DHCPv6 without link-local? S… Teco Boot
- Re: [Autoconf] Using DHCPv6 without link-local? S… Teco Boot
- Re: [Autoconf] Using DHCPv6 without link-local? S… Dearlove, Christopher (UK)
- Re: [Autoconf] Using DHCPv6 without link-local? S… Alexandru Petrescu
- Re: [Autoconf] Using DHCPv6 without link-local? S… Alexandru Petrescu
- Re: [Autoconf] Using DHCPv6 without link-local? S… Teco Boot
- Re: [Autoconf] Using DHCPv6 without link-local? S… Teco Boot
- Re: [Autoconf] Using DHCPv6 without link-local? S… Alexandru Petrescu
- Re: [Autoconf] Using DHCPv6 without link-local? S… Dearlove, Christopher (UK)
- Re: [Autoconf] Using DHCPv6 without link-local? S… Dearlove, Christopher (UK)
- Re: [Autoconf] Using DHCPv6 without link-local? S… Templin, Fred L
- Re: [Autoconf] Using DHCPv6 without link-local? S… Ulrich Herberg
- Re: [Autoconf] Using DHCPv6 without link-local? S… Templin, Fred L
- Re: [Autoconf] Using DHCPv6 without link-local? S… Ulrich Herberg
- Re: [Autoconf] Using DHCPv6 without link-local? S… Teco Boot
- Re: [Autoconf] Using DHCPv6 without link-local? S… Alexandru Petrescu
- Re: [Autoconf] Using DHCPv6 without link-local? S… Ulrich Herberg
- Re: [Autoconf] Using DHCPv6 without link-local? S… Henning Rogge
- Re: [Autoconf] Using DHCPv6 without link-local? S… Ulrich Herberg
- Re: [Autoconf] Using DHCPv6 without link-local? S… Rogge Henning
- Re: [Autoconf] Using DHCPv6 without link-local? S… Teco Boot
- Re: [Autoconf] Using DHCPv6 without link-local? S… Teco Boot
- Re: [Autoconf] Using DHCPv6 without link-local? S… Henning Rogge
- Re: [Autoconf] Using DHCPv6 without link-local? S… Teco Boot
- Re: [Autoconf] Using DHCPv6 without link-local? S… Carlos Jesús Bernardos Cano
- Re: [Autoconf] Using DHCPv6 without link-local? S… Alexandru Petrescu
- Re: [Autoconf] Using DHCPv6 without link-local? S… Joe Macker