The IESG has approved the Internet-Draft 'Subnet Selection sub-option for the Relay Agent Information Option' <draft-ietf-dhc-agent-subnet-selection-04.txt> as a Proposed Standard. This document is the product of the Dynamic Host Configuration Working Group. The IESG contact persons are Erik Nordmark and Thomas Narten. Technical Summary In "Dynamic Host Configuration Protocol" (RFC2131), the giaddr field specifies a single address that indicates both the subnet on which a DHCP client resides as well as the IP address through which the DHCP response is to be relayed back to the client. The Subnet Selection Option (RFC 3011) allows a client (when acting as a DHCP proxy) to override the default function of the giaddr so that a different address can be provided to indicate the subnet from which to allocate an IP address on (the giaddr field still indicates the IP (relay) address through which the DHCP server responds to the client). Analgous situations exist where the relay agent needs to specify a subnet on which a DHCP client resides that is different from the address in the giaddr field. The DHCP Relay Agent Subnet-Selection sub-option specified in this document provides a mechanism to do this. Working Group Summary There was support for this document in the WG, and no issues were raised during Last Call. Protocol Quality This document has been reviewed for the IESG by Thomas Narten.
