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 Subnet Mask This option MAY be added by DHCP relay agents which terminate multiple circuits that are configured with a subnet mask for that circuit. It provides the server with the subnet mask for the circuit on which the relay agent received the request. DHCP servers supporting this option MAY copy the Agent Subnet mask value into the Client Subnet Mask (option 1) parameter returned to the host, and SHOULD have a configurable option to do so. DHCP Servers SHOULD NOT return the Agent Subnet Mask option in the response. This option is intended to avoid the duplicate configuration in both the relay agent and the server of the agent's circuit subnet masks. A DHCP relay agent terminating a public data switched network may have thousands of such configured circuits and masks. Code Len Agent Subnet Mask +------+------+------+------+------+------+------+------+-- | 84 | n | m1 | m2 | m3 | m4 | m5 | m6 | ... +------+------+------+------+------+------+------+------+--