A technique involves exchanging DHCP relay agent information with a DHCP server. In particular, the technique involves receiving a DHCP message en route from a DHCP client to the DHCP server. The DHCP message includes (i) a non-option portion having a client identifier identifying the DHCP client and...http://www.google.de/patents/US20080025299?utm_source=gb-gplus-sharePatent US20080025299 - Techniques for exchanging DHCP information among DHCP relay agents and DHCP servers
