> Perhaps if the case is as in your example (Framed-IPv6-Prefix is contained by > Delegated-IPv6-Prefix, but not equal) >then using the Framed-IPv6-Prefix for > OPTION_PD_EXCLUDE makes some sense?
Maybe it could theoretically make sense but is this a common deployment model? Are there any Service Providers that use or plan to use this model? Thanks Roberta From: Bernie Volz (volz) Sent: Tuesday, November 19, 2013 8:20 AM To: Athanasios Douitsis Cc: [email protected]; Michael Richardson; Roberta Maglione (robmgl); [email protected] WG; [email protected] Subject: RE: [dhcwg] [homenet] PPP, DHCPv6 and Prefix Delegation I guess from RFC 4818, Delegated-IPv6-Prefix is used for PD. Whereas it says: The Framed-IPv6-Prefix attribute [4] is not designed to support delegation of IPv6 prefixes to be used in the user's network, and therefore Framed-IPv6-Prefix and Delegated-IPv6-Prefix attributes may be included in the same RADIUS packet. But, I'm not really clear if that ends up mapping to OPTION_PD_EXCLUDE for the Framed-IPv6-Prefix. Perhaps if the case is as in your example (Framed-IPv6-Prefix is contained by Delegated-IPv6-Prefix, but not equal) then using the Framed-IPv6-Prefix for OPTION_PD_EXCLUDE makes some sense? - Bernie From: dhcwg [mailto:[email protected]] On Behalf Of Athanasios Douitsis Sent: Tuesday, November 19, 2013 7:40 AM To: Bernie Volz (volz) Cc: [email protected]<mailto:[email protected]>; Michael Richardson; Roberta Maglione (robmgl); [email protected]<mailto:[email protected]> WG; [email protected]<mailto:[email protected]> Subject: Re: [dhcwg] [homenet] PPP, DHCPv6 and Prefix Delegation Hello (thanks for the answer), The uplink connection between the delegating and the requesting router will be in many cases enumerated with a prefix dictated by the Framed-IPv6-Prefix value. If this uplink prefix is going to be a part of the greater prefix that will be delegated, we would in effect have to include the value of the Framed-IPv6-Prefix in the OPTION_PD_EXCLUDE. Example, if a delegating router makes a RADIUS request and gets the following attributes in the reply: Framed-IPv6-Prefix='2001:dead:beef::/64' Delegated-IPv6-Prefix='2001:dead:beef::/56' Then the delegating router should 1)send an RA in the client uplink interface with 2001:dead:beef::/64. The uplink is enumerated with that /64. 2)Afterwards, when requested for PD, it should reply with the 2001:dead:beef::/56 to the requesting router, but excluding the 2001:dead:beef::/64 from that /56 by putting it in the OPTION_PD_EXCLUDE. So in effect, the Framed-IPv6-Prefix has been copied in the OPTION_PD_EXCLUDE option. If I have misunderstood something in the RFC or the discussion, I'd be grateful if you would correct me. Thanks very much, Athanasios On Tue, Nov 19, 2013 at 2:07 PM, Bernie Volz (volz) <[email protected]<mailto:[email protected]>> wrote: Why would it ever be copied into that option? That makes no sense to me. - Bernie (from iPad) On Nov 19, 2013, at 6:16 AM, "Athanasios Douitsis" <[email protected]<mailto:[email protected]>> wrote: (i.e. have a configuration option to use the Framed-IPv6-Prefix value in the prefix exclude option instead of an RA) Correction, the above is incorrect, as has been rightly pointed. Are there any cases where the Framed-IPv6-Prefix value will not be copied as-is in the OPTION_PD_EXCLUDE value? _______________________________________________ dhcwg mailing list [email protected]<mailto:[email protected]> https://www.ietf.org/mailman/listinfo/dhcwg -- Athanasios Douitsis
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