Crossbar and an egress packet modifier in an exact-match flow switch
US9807006B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 2015 |
| Grant date | Oct 31, 2017 |
| Priority date | — |
| Expiry date | Dec 25, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L49/3009
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An integrated circuit includes an exact-match flow table structure, a crossbar switch, and an egress packet modifier. Each flow entry includes an egress action value, an egress flow number, and an egress port number. A Flow Id is generated from an incoming packet. The Flow Id is used to obtain a matching flow entry. A portion of the packet is communicated across the crossbar switch to the egress packet modifier, along with the egress action value and flow number. The egress action value is used to obtain non-flow specific header information stored in a first egress memory. The egress flow number is used to obtain flow specific header information stored in a second egress memory. The egress packet modifier adds the header information onto the portion of the packet, thereby generating a complete packet. The complete packet is then output from an egress port indicated by the egress port number.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.