High availability packet forward apparatus and method
US7206309B2 · kind B2 · utility
17Cited by
3References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2001 |
| Grant date | Apr 17, 2007 |
| Priority date | — |
| Expiry date | Oct 12, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L49/201
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A high availability packet forwarding router for an internet protocol (IP) network, includes two control processors, one or more service termination cards (STCs) with forwarding information bases (FIBs), and a packet forwarding engine. The two processors run asynchronously in a master/standby relationship. Integrity of processes running on the control processors is monitored and the forwarding engine forwards packets according to a FIB maintained by an in-service one of the control processors. Hitless failover and hitless software upgrades are supported.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.