Enabling The Device To Log Events Of Detecting Or Receiving Tc Bpdus; Enabling Bpdu Transparent Transmission On A Port - HPE FlexFabric 5940 Series Configuration Manual

Figure 42 Dispute guard triggering scenario
Normal condition
Device A
Root
Port A1
Port B1
Device B
Enabling the device to log events of detecting or
receiving TC BPDUs
This feature allows the device to generate logs when it detects or receives TC BPDUs. This feature
applies only to PVST mode.
To enable the device to log events of detecting or receiving TC BPDUs:
Step
Enter system view.
1.
Enable the device to log
2.
events of receiving or
detecting TC BPDUs.
Enabling BPDU transparent transmission on a
port
Perform this task to enable a port to transmit BPDUs transparently. Whether the spanning tree
protocols are enabled on a port does not affect the BPDU transparent transmission feature.
If this feature and the spanning tree protocol are enabled on a port which is inferior to its downstream
port, the downstream port can receive BPDUs from that port. To prevent network flapping caused by
this problem, disable the spanning tree protocol before you enable BPDU transparent transmission
on the port.
To enable BPDU transparent transmission on a port:
Unidirectional link
occurs
Device A
Root
Port A2 Port A1
Port B2 Port B1
Device B
Root port
Designated port
Blocked port
Dispute guard is
triggered
Device A
Root
Port A2 Port A1
Port B2 Port B1
Device B
Normal link
Blocked link
Unidirectional link
Command
system-view
stp log enable tc
131
Port A2
Port B2
Remarks
N/A
By default, the device does not
generate logs when it detects or
receives TC BPDUs.