After configuring FabricPath, the following message appears in the syslog:
%STP-2-L2GW_BACKBONE_BLOCK: L2 Gateway Backbone port inconsistency blocking port port-channel100 on VLAN0010.
What is a possible reason for this message?
A. Spanning tree must be disabled, and the message indicates that STP is enabled.
B. STP is misconfigured. The root guard must be disabled.
C. An inferior BPDU was received on a Cisco FabricPath edge port.
D. A superior BPDU was received on a Cisco FabricPath edge port.
