UNIFIED REPLICATION MECHANISM FOR FAULT-TOLERANCE OF STATE

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 st...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: GANICHEV IGOR, SHIEH ALAN, KOPONEN TEEMU
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung: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.