Home » HP » HP2-Z31 » What could be the cause of this communication problem?
Refer to the exhibit.
The topology shown in the exhibit has the following characteristics:
* The Open Flow enabled switches are running in virtualization mode with member VLAN 10
* All the switches in the topology share the same VLANs.
* All the VLANs are tagged on all the links.
* Each OpenFlow domain is controlled by its own controller and is making independent decisions
* Every switch within the topology has PVST enabled only on VLAN 10
The networking team implementing OpenFlow reports that there are communication problems between the OpenFlow domains. What could be the cause of this communication problem?
A. This is an unsupported topology.
B. OpenFlow requires a dedicated out-of-band management network
C. OpenFlow networks that communicate must use different VLANs.
D. A loop has been formed.
Correct Answer: A
Explanation/Reference:
Explanation: Virtualization mode
With Virtualization Mode, some VLANs can be designated as members of OpenFlow instances. Each OpenFlow instance is independent and has its own OpenFlow configuratio
Note: OpenFlow can be configured for Virtualization Mode or Aggregation Mode.
* Virtualization Mode
Each OpenFlow instance is independent and has its own OpenFlow configuration and OpenFlow controller connection. Some VLANs are designated as members of OpenFlow instances while other VLANs are not. The VLANs that are not members of OpenFlow instances could be thought of as VLANs carrying production traffic.
* Aggregation Mode
Provides a single OpenFlow instance that includes all of the VLANs configured on the switch except the VLAN(s) that connect to the controller(s) and the Management VLAN on the switch.
Production traffic is not allowed
Reference: HP OpenFlow Switches Administrator’s Guide
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