To: iana@isi.edu Subject: Request for DHCP Options for Circuit-Mode Relay Agents Date: Wed, 09 Oct 1996 11:51:20 -0400 From: "Michael W. Patrick" X.X Agent Remote ID This option MAY be added by DHCP relay agents which terminate switched or permanent circuits and have mechanisms to identify the remote host end of the circuit. The Remote ID field may be used to encode, for instance: -- a "caller ID" telephone number for dial-up connection -- a "user name" prompted for by a Remote Access Server -- a remote caller ATM address -- a "modem ID" of a cable data modem -- the remote IP address of a point-to-point link -- a remote X.25 address for X.25 connections The format of the Agent Remote ID will depend on the type of circuit connected to the relay agent, and further specification of this field may be standardized by the IETF working groups responsible for IP communications on those circuit types. The only requirement is that the remote ID be administered as globally unique. DHCP servers supporting this option MUST return the option value unchanged in all Offer and Ack responses. DHCP servers MAY use this option to select parameters specific to particular users, hosts, or subscriber modems. The relay agent MAY use this field in addition to or instead of the Agent Circuit ID field to select the circuit on which to forward the DHCP Offer/Ack reply. Code Len Agent Remote ID +------+------+------+------+------+------+------+------+-- | 83 | n | r1 | r2 | r3 | r4 | r5 | r6 | ... +------+------+------+------+------+------+------+------+--