Reference Guide

Introduction
In a network managed by a controller, the controller itself stands out to be a single point of failure.
Controller failures can disrupt the entire network functionality. HP VAN SDN Controller Distributed
Coordination infrastructure provides various mechanisms that controller applications can make use
of in achieving active-active, active-standby Distributed Coordination paradigms and internode
communication. The Distributed Coordination infrastructure provides 2 services for the applications
to develop Distributed Coordination aware controller modules.
•
Controller Teaming
•
Distributed Coordination Service
Following figure describes the communication between the controller applications and the HP VAN
SDN Controller Distributed Coordination sub-systems. “App1 – 1” indicates instance of application
1 on controller instance 1. Distributed services, ensures the data synchronization across the
controller cluster nodes.
Figure 31 Application view of Coordination Services
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