HP 3100 v2 Series Command Reference Manual page 106

Description
Use display stp history 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:
•
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.
Examples
# In MSTP mode, display the historical port role calculation information in MSTI 2.
<Sysname> display stp instance 2 history slot 1
--------------- STP slot 1 history trace ---------------
-------------------
Port Ethernet1/0/1
Role change
Time
Port priority : 0.00e0-fc01-6510 0 0.00e0-fc01-6510 128.1
Port Ethernet1/0/2
Role change
Time
Port priority : 0.00e0-fc01-6510 0 0.00e0-fc01-6510 128.2
# In PVST mode, display the historical port role calculation information in VLAN 2.
<Sysname> system-view
[Sysname] stp mode pvst
[Sysname] display stp vlan 2 history slot 1
--------------- STP slot 1 history trace ---------------
-------------------
Port Ethernet1/0/1
Role change
Time
Port priority : 0.00e0-fc01-6510 0 0.00e0-fc01-6510 128.1
Port Ethernet1/0/2
Role change
Time
Port priority : 0.00e0-fc01-6510 0 0.00e0-fc01-6510 128.2
Instance 2 ---------------------
: ROOT->DESI (Aged)
: 2009/02/08 00:22:56
: ALTER->ROOT
: 2009/02/08 00:22:56
VLAN 2 ---------------------
: ROOT->DESI (Aged)
: 2009/02/08 00:22:56
: ALTER->ROOT
: 2009/02/08 00:22:56
99