104
View
Any view
Default level
1: Monitor level
Parameters
|: Filters command output by specifying a regular expression. For more information about regular
expressions, see Fundamentals Configuration Guide.
begin: Displays the first line that matches the specified regular expression and all lines that follow.
exclude: Displays all 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, a case-sensitive string of 1 to 256 characters.
Example
# Display information about ports shut down by spanning tree protection functions.
<Sysname> display stp down-port
Down Port Reason
GigabitEthernet1/0/1 BPDU-Protected
GigabitEthernet1/0/2 Formatfrequency-Protected
Table 27 Command output
Name of a port shut down by the spanning tree protection functions.
Reason that the port was shut down:
BPDU-Protected—BPDU guard function.
Formatfrequency-Protected—MSTP BPDU format frequent change protection function.
display stp history
Description
Use the display stp history command to display the historical port role calculation information of the
specified MSTI or all MSTIs.
In STP/RSTP mode, the displayed information is sorted by port role calculation time.
In MSTP mode, follow these guidelines:
If you do not specify any MSTI, this command displays the historical port role calculation information
of all MSTIs. The displayed information is sorted by MSTI ID and by port role calculation time in
each MSTI.
If you specify an MSTI, this command displays the historical port role calculation information of the
specified MSTI by the sequence of port role calculation time.
In PVST mode, follow these guidelines:
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