Frame-level fibre channel CRC on switching platform
US7391723B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2003 |
| Grant date | Jun 24, 2008 |
| Priority date | — |
| Expiry date | Aug 5, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/56
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus is presented for performing a sequence-level CRC calculation on fiber channel communications within a switching platform domain. A CRC generator searches the data communication for frames that contain the type of data for which a sequence-level CRC is desired, such as for a sequence containing SCSI data. If found, and the type of data allows multiple frames per sequence, the present invention creates a CRC value for the sequence. An intermediate CRC value is stored in a queue to allow the simultaneous calculation of sequence level CRC values for multiple frames. With inbound data, the sequence-level CRC is appended to the end of the sequence data. With outbound data, the calculated value is compared with the appended, expected value, With single-frame fiber channel protocols, the frame-level CRC value is obtained directly from the frames entering the switching platform domain. This value is placed in a local queue, from which it is appended to the data payload by a processor for transmission within the switching platform. When the single frame is leaving the switching platform domain, the flow of data leaving the switching platform domain is monitored and the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.