3com S7906E Guide De Référence

 

1-7 

These actions include: 

z 

BPDU attack guard action 

z 

MSTP BPDU format compatibility protection action 

# View the information about ports blocked by STP protection actions.  

<Sysname> display stp down-port 

Down Port                Reason 

GigabitEthernet2/0/1     BPDU-Protected 

GigabitEthernet2/0/2     Formatfrequency-Protected 

Table 1-5 display stp abnormal-port command output description  

Down Port 

Name of a blocked port 

Reason 

Reason that caused the port to be blocked.  

z 

BPDU-Protected: BPDU attack guard action 

z 

Formatfrequency-Protected: MSTP BPDU format compatibility protection 
action 

 

display stp [ instance instance-id ] history [ slot slot-number ] 

Any view 

0: Visit level 

instance instance-id: Displays the historic port role calculation information of a particular MSTI. The 

value of instance-id ranges from 0 to 31. The minimum value is 0, representing the CIST. 

slot slot-number: Displays the historic port role calculation information of the card on the specified slot.  

Use the display stp history command to view the historic port role calculation information of the 

specified MSTI or all MSTIs.  

Note that: 

z 

If you do not specify an MSTI ID, this command will display the historic port role calculation 

information of all MSTIs. The displayed information is sequenced by MSTI ID, and by port role 

calculation time in each MSTI.  

z 

If you specify an MSTI ID, this command will display the historic port role calculation information of 

only this specified MSTI by the sequence of port role calculation time.