R211x-HP Flexfabric 11900 Layer 2 - LAN Switching Command Reference

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Usage guidelines
In STP or RSTP mode, the displayed information is sorted by port role calculation time.
In MSTP mode:
• If you do not specify any MSTI, this command displays the historical port role calculation
information for 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 for the
specified MSTI by the sequence of port role calculation time.
Examples
In standalone mode:
# In MSTP mode, display the historical port role calculation information for the card on slot 1 in MSTI 2.
<Sysname> display stp instance 2 history slot 1
--------------- STP slot 1 history trace ---------------
------------------- Instance 2 ---------------------
Port Ten-GigabitEthernet1/0/1
Role change : ROOT->DESI (Aged)
Time : 2009/02/08 00:22:56
Port priority : 0.00e0-fc01-6510 0 0.00e0-fc01-6510 128.1
Port Ten-GigabitEthernet1/0/2
Role change : ALTER->ROOT
Time : 2009/02/08 00:22:56
Port priority : 0.00e0-fc01-6510 0 0.00e0-fc01-6510 128.2 128.153
In IRF mode:
# In MSTP mode, display the historical port role calculation information for the card on slot 1 of IRF
member device 1 in MSTI 2.
<Sysname> display stp instance 2 history chassis 1 slot 1
---------- STP chassis 1 slot 1 history trace --------
------------------- Instance 2 ---------------------
Port Ten-GigabitEthernet1/0/1
Role change : ROOT->DESI (Aged)
Time : 2009/02/08 00:22:56
Port priority : 0.00e0-fc01-6510 0 0.00e0-fc01-6510 128.1
Port Ten-GigabitEthernet1/0/2
Role change : ALTER->ROOT
Time : 2009/02/08 00:22:56
Port priority : 0.00e0-fc01-6510 0 0.00e0-fc01-6510 128.2 128.153
Table 33 Command output
Field Descri
p
tion
Port Port name.
Role change
Role change of the port ("Aged" means that the change was caused by expiration
of the received configuration BPDU).
Time Time of port role calculation.
Port priority Port priority.