4-9
View
Any view
Default Level
1: Monitor level
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 function
z
Loop guard function
z
MSTP BPDU format incompatibility protection function
Examples
# View information about abnormally blocked ports.
<Sysname> display stp abnormal-port
MSTID Blocked Port Reason
1 GigabitEthernet1/0/1 ROOT-Protected
2 GigabitEthernet1/0/2 LOOP-Protected
2 GigabitEthernet1/0/3 Formatcompatibility–Protected
Table 4-4 display stp abnormal-port
command output description
Field
Description
MSTID
ID of the MSTI to which an abnormally blocked port belongs
Blocked Port
Name of an abnormally blocked port
Reason
Reason that caused abnormal blocking of the port.
z
ROOT-Protected: root guard function
z
LOOP-Protected: loop guard function
z
Formatcompatibility-Protected: MSTP BPDU format incompatibility
protection function
display stp down-port
Syntax
display stp down-port
View
Any view
Default Level
1: Monitor level
Содержание E4510-48G
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