Display Stp History - H3C S7500E Series Command Manual

Command Manual – MSTP
H3C S7500E Series Ethernet Switches
Table 1-4 Description on the fields of the display stp abnormal-port command
Down Port
Reason

1.1.6 display stp history

Syntax
display stp [ instance instance-id ] history [ slot slot-number ]
View
Any view
Parameters
instance instance-id: Displays the historic port role calculation information of a
particular spanning tree instance. The effective range of instance-id is 0 to 31, with 0
representing the common internal spanning tree (CIST).
slot slot-number: Displays the historic port role calculation information of the card on
the specified slot.
Description
Use the display stp history command to view the historic port role calculation
information of the specified spanning tree instance or all spanning tree instances.
Note that:
If you do not specify a spanning tree instance ID, this command will display the
historic port role calculation information of all spanning tree instances. The
displayed information is sequenced by instance ID, and in the timing of port role
calculation in each instance.
If you specify a spanning tree instance ID, this command will display the historic
port role calculation information of only this specified spanning instance, in the
timing of port role calculation.
Examples
# View the historic port role calculation information of the card on slot 1 in MSTP
instance 2.
<Sysname> display stp instance 2 history slot 1
Field
Name of blocked port
Reason that caused the port to be blocked.
BPDU-Protected: BPDU attack guard action
Formatfrequency-Protected:
compatibility protection action
Chapter 1 MSTP Configuration Commands
Description
1-7
MSTP BPDU format