Fast IP packet classification with configurable processor
US7227842B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2002 |
| Grant date | Jun 5, 2007 |
| Priority date | — |
| Expiry date | Feb 16, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L47/2441
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A novel solution for fast packet classification includes a novel data structure to store classifier rules which enables fast packet classification, which structure employs bitmaps for each field of the incoming packet for which classification is desired. A fast packet classification algorithm using the novel data structure allows the matching rule with the highest priority to be quickly obtained. A novel rule update algorithm allows new classifier rules to be added into the data structure incrementally. In one practical implementation of a classification engine employing the structures and algorithms of the present invention, a configurable processor with customized instructions is used to accelerate packet classification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.