High-availability packet forwarding apparatus and method
US7342874B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 2003 |
| Grant date | Mar 11, 2008 |
| Priority date | — |
| Expiry date | Jan 10, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L49/201
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Failover protection is provided on the same facilities for a network connection passing through a high-availability router having shared resources managed by two control processors that respectively maintain a forwarding information bases (FIB). The two processors run asynchronously in a master/standby relationship. Integrity of processes running on the control processors is monitored and a forwarding engine forwards packets according to a FIB maintained by an in-service one of the control processors. If one of the control processors fails, the other control processor uses the same bandwidth on the same facility to continue forwarding packets for a network connection. Identifiers in each packet associated with the network connection are used to indicate the reserved bandwidth associated with the network connection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.