Method and apparatus for line card redundancy in a communication switch
US7551549B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1999 |
| Grant date | Jun 23, 2009 |
| Priority date | — |
| Expiry date | Mar 24, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L49/30
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for line card redundancy in a communication switch is presented. The switch includes an arbiter coupled to the input of a switch core and a line card pair. The first line card of the line card pair is considered an active line card, whereas the second line card of the line card pair is considered the redundant, or inactive, line card. The active and inactive line cards are determined based on selection information received by the arbiter. Based on the selection information, the arbiter preferentially provides ingress data from the active line card to the corresponding input of the switch core. A router is coupled to the line card pair and to an output of the switch core. The router passes egress data from the switch core to at least one of the first and second line cards based on routing information included in the egress data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.