Systems and methods for implementing weighted cost multi-path using two-level equal cost multi-path tables
US9246821B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2014 |
| Grant date | Jan 26, 2016 |
| Priority date | — |
| Expiry date | May 8, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/24
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
This disclosure provides systems, methods, and apparatus for providing a network switch for implementing weighted cost multi-pathing (WCMP). In some implementations, the switch can implement equal cost multi-pathing (ECMP) using ECMP forwarding tables. The ECMP forwarding table may include more than one output port associated with a destination address of an incoming packet. The ECMP forwarding table may become undesirably large if unequal weights were assigned to the output ports. A multi-level ECMP table can be implemented that can allow assigning weights to the output ports while being relatively small. The multi-level ECMP table can include a first level where each entry includes at most a single output port. A second level can include entries having one or more output ports.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.