RE: [dhcwg] [Question] When should we use Interface-ID option
"Bernie Volz \(volz\)" <volz@cisco.com> Sun, 15 October 2006 14:44 UTC
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Subject: RE: [dhcwg] [Question] When should we use Interface-ID option
Date: Sun, 15 Oct 2006 10:44:29 -0400
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Thread-Topic: [dhcwg] [Question] When should we use Interface-ID option
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From: "Bernie Volz (volz)" <volz@cisco.com>
To: Hideshi.Enokihara@jp.yokogawa.com, dhcwg@ietf.org
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Hideshi: If a relay agent (which is a router) terminates a bunch of circuits, it may well be that each of those circuits does not have their own unique prefix (and hence a link-addess field that can be used). For example, a relay may have one global address for all of these circuits. In such a case, the relay must know on which circuit to relay any replies from a server, and hence the interface-id can be used. - Bernie -----Original Message----- From: Hideshi.Enokihara@jp.yokogawa.com [mailto:Hideshi.Enokihara@jp.yokogawa.com] Sent: Friday, October 06, 2006 3:43 AM To: dhcwg@ietf.org Subject: [dhcwg] [Question] When should we use Interface-ID option Hi all, I have a question regarding Interface-ID option in DHCPv6. RFC3315 defines Interface-ID option, but I cannot understand in what situation this option should be used. RFC3315 20.1.1 says, ---------- (snip) If the relay agent cannot use the address in the link-address field to identify the interface through which the response to the client will be relayed, the relay agent MUST include an Interface-id option (see section 22.18) (snip) ---------- I cannot imagine above sentence situation. I mean that I can't think up the situation("Relay agent cannot use the address in the link-address field to identify the interface") Someone, please teach me the situation that Relay agent should use Interface-ID option in detail. Moreover, I can't understand actual meaning of following statement. #I feel the RFC is unclear regarding Interface-id option usage. -------------- 20.1.1. Relaying a Message from a Client (snip) The relay agent fills in the link-address field as described in the previous paragraph regardless of whether the relay agent includes an Interface-id option in the Relay-forward message. --------------- In this statement, when a Relay agent includes an Interface-id option, what should the Relay agent fill in the link-address field? What do you think? Best Regards, ************************************* Hideshi Enokihara IPv6 Business Network & Software Development Dept. Yokogawa Electric Corporation _______________________________________________ dhcwg mailing list dhcwg@ietf.org https://www1.ietf.org/mailman/listinfo/dhcwg _______________________________________________ dhcwg mailing list dhcwg@ietf.org https://www1.ietf.org/mailman/listinfo/dhcwg
- [dhcwg] [Question] When should we use Interface-I… Hideshi.Enokihara
- Re: [dhcwg] [Question] When should we use Interfa… Anthony Baire
- RE: [dhcwg] [Question] When should we use Interfa… Kostur, Andre
- RE: [dhcwg] [Question] When should we use Interfa… Bernie Volz (volz)
- RE: [dhcwg] [Question] When should we use Interfa… Bernie Volz (volz)
- RE: [dhcwg] [Question] When should we use Interfa… Bernie Volz (volz)
- RE: [dhcwg] [Question] When should we use Interfa… Hideshi.Enokihara
- RE: [dhcwg] [Question] When should we use Interfa… Bernie Volz (volz)
- RE: [dhcwg] [Question] When should we use Interfa… Templin, Fred L
- Re: [dhcwg] [Question] When should we use Interfa… Hideshi Enokihara
- RE: [dhcwg] [Question] When should we use Interfa… Bernie Volz (volz)
- RE: [dhcwg] [Question] When should we use Interfa… Hideshi.Enokihara
- Re: [dhcwg] [Question] When should we use Interfa… Ralph Droms
- Re: [dhcwg] [Question] When should we use Interfa… Anthony Baire