Flow switch IC that uses flow IDs and an exact-match flow table
US9912591B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 2015 |
| Grant date | Mar 6, 2018 |
| Priority date | — |
| Expiry date | Oct 12, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/02
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An exact-match flow table structure of an integrated circuit stores flow entries. Each flow entry includes a Flow Id and an action value. Each Flow Id is a multi-bit digital value that uniquely identifies a flow. A Flow Id does not include any wildcard indictor. The flow table structure cannot and does not store an indicator that any particular part of a packet should be matched against any part of a Flow Id. In one example, a packet is received onto the integrated circuit. A Flow Id is generated from the packet. If the flow table structure determines that the Flow Id is a bit-by-bit exact-match of any Flow Id of any stored flow entry, then the packet is handled according to the action value of the flow entry. If, on the other hand, there is not exact-match, then a miss indication is output from the integrated circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.