Method for a cable modem to rapidly switch to a backup CMTS
US7058007B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2000 |
| Grant date | Jun 6, 2006 |
| Priority date | — |
| Expiry date | Jan 18, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2005
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A protection CMTS is available to immediately service a cable modem should that modem's service from a working CMTS fail for any reason. To speed the service transfer (cutover) from the working CMTS to the protection CMTS, the cable modem may preregister with the protection CMTS well before the cutover becomes necessary. The cable modem's registration with both the working CMTS and the protection CMTS preferably employs a single IP address, so that the cable modem need not obtain a new IP address during cutover. While the cable modem may register with both the working CMTS and the protection CMTS, the devices are designed or configured so that only the working CMTS injects a host route for the cable modem into the appropriate routing protocol. Only after cutover to the protection CMTS does the protection CMTS inject its host route.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.