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:
Jan. 04, 2005
Filed:
Jan. 18, 2000
Feisal Daruwalla, Santa Clara, CA (US);
James R. Forster, Los Altos, CA (US);
Guenter E. Roeck, San Jose, CA (US);
Richard M. Woundy, North Reading, MA (US);
Michael A. Thomas, San Francisco, CA (US);
Feisal Daruwalla, Santa Clara, CA (US);
James R. Forster, Los Altos, CA (US);
Guenter E. Roeck, San Jose, CA (US);
Richard M. Woundy, North Reading, MA (US);
Michael A. Thomas, San Francisco, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
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.