单选题After configuring FabricPath， the following appears in the syslog： %STP-2-L2GW_BACKBONE_BLOCK： L2 Gateway Backbone port inconsistency blocking port port-channel100 on VLAN0010. What is the cause of this message？ （）A STP must be disabled； message indicates that STP is enabled.B STP is misconfigured； root guard must be disabled.C An inferior BPDU is received on a Cisco FabricPath edge port.D A superior BPDU is received on a Cisco FabricPath edge port.
单选题
After configuring FabricPath， the following appears in the syslog： %STP-2-L2GW_BACKBONE_BLOCK： L2 Gateway Backbone port inconsistency blocking port port-channel100 on VLAN0010. What is the cause of this message？ （）
A
STP must be disabled； message indicates that STP is enabled.
B
STP is misconfigured； root guard must be disabled.
C
An inferior BPDU is received on a Cisco FabricPath edge port.
D
A superior BPDU is received on a Cisco FabricPath edge port.
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