Synchronizing packet sequence numbers for line card redundancy
US8018839B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 13, 2009 |
| Grant date | Sep 13, 2011 |
| Priority date | — |
| Expiry date | Feb 26, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L69/40
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Exemplary embodiments relate to a network node implementing redundant cards and configured to synchronize sequence numbers, and a related method. The network node may include a fabric configured to route packets towards a destination. Furthermore, the network node may include an active card configured to establish at least one link to a destination node, generate a sequence number for each packet to be sent, and send a messaging packet including at least one sequence number from the active card to inactive cards over a communication channel on a data path in the fabric. Finally, the network node may include an inactive card configured to receive the messaging packet including the at least one sequence number from the active card over the communication channel, extract the at least one sequence number, and synchronize operation of the inactive card to the active card using the at least one sequence number.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.