11-9
Field Description
MAC address MAC address of the device
Max age(s) Aging timer (in seconds) for BPDUs
Forward delay(s) Port state transition delay (in seconds)
Hello time(s) Interval (in seconds) for the root bridge to send BPDUs
Max hops Maximum hops in the MSTI
display stp abnormal-port
Syntax
display stp abnormal-port [ | { begin | exclude | include } regular-expression ]
View
Any view
Default Level
1: Monitor level
Parameters
|: Filters command output by specifying a regular expression. For more information about regular
expressions, see CLI Configuration in the Fundamentals Configuration Guide.
begin: Displays the first line that matches the specified regular expression and all lines that follow.
exclude: Displays the lines that do not match the specified regular expression.
include: Displays all lines that match the specified regular expression.
regular-expression: Specifies a regular expression, which is a case sensitive string of 1 to 256
characters.
Description
Use the display stp abnormal-port command to display the information about abnormally blocked
ports.
Any of the following reasons may cause a port to be abnormally blocked:
Root guard function
Loop guard function
MSTP BPDU format incompatibility protection function
Examples
# Display 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
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