System and method for increasing capacity in router forwarding tables
US9438505B1 · kind B1 · utility
23Cited by
3References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2012 |
| Grant date | Sep 6, 2016 |
| Priority date | — |
| Expiry date | Mar 11, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L47/30
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A multi-stage TCAM may include a plurality of tables on a pipeline and may store flow rules, including a key, an action, and a priority. The flow rule's key, which may consist of a number of bits, may be divided into several buckets. For each bucket, a hardware table on the multi-stage TCAM may be created. The first bucket may be used as a lookup key to the first table, and an output from this first table may be used as a lookup key to the next table on the pipeline. Because the full flow key need not be stored in a single TCAM table, a capacity of the TCAM can be maximized with its width minimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.