The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 20, 2014
Filed:
May. 13, 2009
Kenneth Kinnear, Jr., Boxborough, MA (US);
Neil Russell, Wakefield, MA (US);
Mark Stapp, Belmont, MA (US);
Bernard Volz, Center Harbor, NH (US);
Kenneth Kinnear, Jr., Boxborough, MA (US);
Neil Russell, Wakefield, MA (US);
Mark Stapp, Belmont, MA (US);
Bernard Volz, Center Harbor, NH (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
In an embodiment, a data processing apparatus comprising one or more electronic digital processors; Dynamic Host Configuration Protocol (DHCP) server logic coupled to the one or more processors; an active leasequery channel response logic coupled to the DHCP server logic which when executed causes the one or more processors to perform receiving, from a particular DHCP client among a plurality of DHCP clients, an active leasequery initiation message requesting the DHCP server logic to actively send update messages about changes in network address leases that the DHCP server logic manages; wherein the active leasequery initiation message comprises a channel identifier value; determining whether the channel identifier value matches a client class that the DHCP server logic manages; in response to determining that the channel identifier value does match a client class identifier that the DHCP server logic manages, sending, to the particular DHCP client, one or more DHCP response messages describing any changes in network address leases that the DHCP server logic performs only for a subset of the DHCP clients that are in the matched client class.