Owner's Manual

601
display stp down-port
Syntax display stp down-port
View Any view
Parameters None
Description Use the
display stp down-port command to view the information about ports
blocked by STP protection actions.
These actions include:
■ BPDU attack guard action
■ MSTP BPDU format compatibility protection action
Examples # View the information about ports blocked by STP protection actions.
<Sysname> display stp down-port
Down Port Reason
Ethernet1/0 BPDU-Protected
Ethernet1/1 Formatfrequency-Protected
display stp history
Syntax display stp [ instance instance-id ] history
View Any view
Table 104 Description on the fields of the display stp abnormal-port command
Field Description
MSTID MST instance ID
Blocked Port Name of blocked port, which corresponds to the related MST instance
Reason Reason that caused abnormal blocking of the port.
■ ROOT-Protected: root guard action
■ LOOP-Protected: loop guard action
■ Formatcompatibility-Protected: MSTP BPDU format compatibility
protection action
Table 105 Description on the fields of the display stp abnormal-port command
Field Description
Down Port Name of blocked port
Reason Reason that caused the port to be blocked.
■ BPDU-Protected: BPDU attack guard action
■ Formatfrequency-Protected: MSTP BPDU format compatibility
protection action