Q2
Single choice
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?