07512969 is referenced by 22 patents and cites 21 patents.

The detection of devices with duplicate media access controller (MAC) addresses in a cable network. A cable network device (CND) having a MAC address is connected by the cable network to a cable modem termination system (CMTS) having a gateway interface address. A centralized storage of historical cable modem MAC address/giaddr tuple data is used to identify CNDs that report duplicate MAC addresses. The cable network tracks the CND MAC address/giaddr tuple data of all CND requests that it receives and stores the MAC address/giaddr tuple data into a datastore (such as a database). When a CND seeks to access the network, the cable network looks into the datastore to determine whether the CND MAC address of the CND has previously been stored with a different associated giaddr, which would imply that there are multiple CNDs attached to different CMTSs where the CNDs share the same MAC address. If such duplication is detected, an appropriate remedial response is taken.

Title
System and method for detecting and reporting cable network devices with duplicate media access control addresses
Application Number
10/719836
Publication Number
7512969 (B2)
Application Date
November 21, 2003
Publication Date
March 31, 2009
Inventor
Christopher Pierce Williams
Potomac Falls
VA, US
Kenneth Gould
Oakton
VA, US
Agent
Roberts Mardula & Wertheim
Assignee
Time Warner Cable a division of Time Warner Entertainment Company
CT, US
IPC
G08B 23/00
H04L 9/32
H04N 7/173
H04N 7/16
H04L 12/403
G06F 15/173
G06F 17/30
G06F 7/04
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