Load sharing across flows
US6603765B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2000 |
| Grant date | Aug 5, 2003 |
| Priority date | — |
| Expiry date | Oct 25, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/10015
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The invention provides a system and method for sharing packet traffic load among a plurality of possible paths. Each packet is associated with a flow, and a hash value is determined for each flow, so as to distribute the sequence of packets into a set of hash buckets. The hash value has a relatively large number of bits, but is divided by the number of possible paths so as to achieve a relatively small modulus value; the modulus value is used to index into a relatively small table associating one selected path with each entry. The modulus value is determined by a relatively small amount of circuitry, simultaneously for a plurality of moduli, and one such modulus value is selected in response to the number of possible paths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.