HP A5830 Series Command Reference Manual page 112

If you do not specify any VLAN, this command displays the historical port role calculation
information of all VLANs. The displayed information is sorted by VLAN ID, and by port role
calculation time in each VLAN.
If you specify a VLAN, this command displays the historical port role calculation information of the
specified VLAN by the sequence of port role calculation time.
Syntax
display stp [ instance instance-id | vlan vlan-id ] history [ slot slot-number ] [ | { begin | exclude |
include } regular-expression ]
View
Any view
Default level
0: Visit level
Parameters
instance instance-id: Displays the historical port role calculation information of a specific MSTI. The value
of instance-id is in the range of 0 to 31, where 0 represents the CIST.
vlan vlan-id: Displays the historical port role calculation information for a specific VLAN, in the range of
1 to 4094.
slot slot-number: Displays the historical port role calculation information on the specified IRF member
switch. slot-number represents the number of the member number of the device in the IRF. If this keyword-
parameter combination is not specified, this command displays the historical port role calculation
information on all IRF member switches.
|: 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.
Examples
# In MSTP mode, display the historical port role calculation information of IRF member switch 1 in MSTI
2.
<Sysname> display stp instance 2 history slot 1
--------------- STP slot 1 history trace ---------------
-------------------
Port GigabitEthernet1/0/1
Role change
Time
Port priority : 0.00e0-fc01-6510 0 0.00e0-fc01-6510 128.1
Port GigabitEthernet1/0/2
Role change
Instance 2 ---------------------
: ROOT->DESI (Aged)
: 2009/02/08 00:22:56
: ALTER->ROOT
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