Apparatus and method for performing header lookup based on sequential lookup
US7433357B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2004 |
| Grant date | Oct 7, 2008 |
| Priority date | — |
| Expiry date | Oct 21, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/62
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for performing packet header lookup based on sequential lookup is provided. A header analyzer separates a header from a packet received via a network and outputs a lookup sequence. A unit lookup unit looks up matching the header combination rules with each field to be analyzed and input from the header analyzer based on the lookup sequence input from the header analyzer and outputs a match signal and a match address. A rule combination memory stores identification information for the header combination rules. A sequence combination memory stores lookup sequence information and sequence combination information. A rule combination unit generates match results based on the match signal input from the unit lookup unit and data read from the rule combination memory and the sequence combination memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.