Methods and apparatus for fast ETHERNET link switchover in the event of a link failure
US7577089B2 · kind B2 · utility
4Cited by
14References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 26, 2006 |
| Grant date | Aug 18, 2009 |
| Priority date | — |
| Expiry date | Jan 11, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L49/552
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An apparatus for fast failure switch over in an ETHERNET switch includes redundant switch (trunk) ports (a main and a backup) and hardware and software logic for redirecting traffic to the backup port when the main port (or the link associated with it) fails. The switchover is immediate and is based on the content of a local status register which indicates the port (link) status. Thus, frames addressed to the dead port are redirected to the backup port and few frames are lost. The STP function may proceed concurrently and eventually no more frames are addressed to the dead port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.