System and method for detecting and reporting cable modems with duplicate media access control addresses
US8260941B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2007 |
| Grant date | Sep 4, 2012 |
| Priority date | — |
| Expiry date | Dec 9, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2101/622
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The detection of devices with duplicate media access controller (MAC) addresses in a cable network may be accomplished by reference to a value indicative of a DOCSIS version supported by the device or by reference to a having a MAC address/giaddr pair. Where a version value is used, the detection of devices having duplicate MAC addresses looks for changes in the reported version value from a higher version to a lower version. Where MAC address/giaddr pairs are used, a centralized storage of historical cable modem MAC address/giaddr pair data is used to identify cable modems (CM's) that report duplicate MAC addresses. If duplication is detected, an appropriate remedial response is taken.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.