Unified replication mechanism for fault-tolerance of state
US9432252B2 · kind B2 · utility
5Cited by
51References
20Claims
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Key dates
| Filing date | Mar 31, 2014 |
| Grant date | Aug 30, 2016 |
| Priority date | — |
| Expiry date | Oct 10, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/586
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A network control system that achieves high availability for forwarding state computation within a controller cluster by replicating different levels of table state between controllers of the controller cluster. To build a highly available controller cluster, the tables for storing the forwarding state are replicated across the controllers. In order to take responsibility for a slice, the slave controller of some embodiments performs merging of replicated state on a slice-by-slice basis. The merging is performed in a manner to prevent disruptions to the network state while the slave controller is updated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.