3com S7906E Guide De Référence
1-6
Parameters
None
Description
Use the display stp abnormal-port command to view the information about abnormally blocked ports.
Any of the following reasons may cause a port to be abnormally blocked:
z
Root guard action
z
Loop guard action
z
MSTP BPDU format compatibility protection action
Examples
# View information about abnormally blocked ports.
<Sysname> display stp abnormal-port
MSTID Blocked Port Reason
1 GigabitEthernet2/0/1 ROOT-Protected
2 GigabitEthernet2/0/2 LOOP-Protected
2 GigabitEthernet2/0/3 Formatcompatibility–Protected
Table 1-4 display stp abnormal-port command output description
Field
Description
MSTID
MSTI ID
Blocked Port
Name of a blocked port, which corresponds to the related MSTI
Reason
Reason that caused abnormal blocking of the port.
z
ROOT-Protected: root guard action
z
LOOP-Protected: loop guard action
z
Formatcompatibility-Protected:
MSTP BPDU format compatibility
protection action
display stp down-port
Syntax
display stp down-port
View
Any view
Default Level
1: Monitor level
Parameters
None
Description
Use the display stp down-port command to view the information about ports blocked by STP
protection actions.