How does an HP VAN SDN Controller team provide high availability for OpenFlow switches?
A. By using the northbound controller interface tied to a region configuration
B. By using the northbound controller interface with a secondary interface
C. By using the southbound controller interface tied to a region configuration
D. By using the southbound controller interface with a secondary interface
Correct Answer: C
Explanation/Reference:
Explanation: * Northbound API Relative to figure 1 below, the Northbound API is the API that enables communications between the control layer and the application layer (external business applications.
Southbound API
Relative to Figure 1 below, the Southbound API is the API that enables communications between the control layer and the infrastructure layer (OpenFlow).
Figure 1. ONF’s SDN architecture
* Putting the region configurations in place in a controller team ensures seamless failover and failback among the configured controllers for the specified network devices in a region. That is, when a master controller experiences a fault, the Role Orchestration Service ensures that a slave controller immediately assumes the master role over the group of network devices to which the failed controller was in the master role.
Reference: Technical white paper, Mock RFI for Enterprise SDN Solutions
Reference: HP VAN SDN Controller Administrator Guide