3com MSR 20-20 참조 매뉴얼

Any view

None

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

# 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 [ instance instance-id ] history

Any view

Table 104   Description on the fields of the display stp abnormal-port command

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

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