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display stp history
Syntax
display stp [ instance instance-id ] history
View
Any view
Default Level
0: Visit level
Parameters
instance instance-id: Displays the historic port role calculation information of a particular MSTI. The
minimum value of instance-id is 0, representing the common internal spanning tree (CIST), and the
maximum value of instance-id is 3.
Description
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 sorted 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.
Examples
# View the historic port role calculation information in MSTI 2.
<Sysname> display stp instance 2 history
------------------- Instance 2 ---------------------
Port GigabitEthernet1/0/1
Role change : ROOT->DESI （Aged）
Time : 2006/08/08 00:22:56
Port priority : 0.00e0-fc01-6510 0 0.00e0-fc01-6510 128.1
Port GigabitEthernet1/0/2
Role change : ALTER->ROOT
Time : 2006/08/08 00:22:56
Port priority : 0.00e0-fc01-6510 0 0.00e0-fc01-6510 128.2
Table 1-6 display stp history command output description
Field Description
Port Port name
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