HP E4510-48G, Command Reference Manual

Page: 122 / 1334

4-10
Parameters
None
Description
Use the display stp down-port command to display the information about ports blocked by STP
protection functions.
These functions include:
z
BPDU attack guard function
z
MSTP BPDU format frequent change protection function
Examples
# View the information about ports blocked by STP protection functions.
<Sysname> display stp down-port
Down Port Reason
GigabitEthernet1/0/1 BPDU-Protected
GigabitEthernet1/0/2 Formatfrequency-Protected
Table 4-5 display stp abnormal-port command output description
Field Description
Down Port Name of a blocked port
Reason
Reason that caused the port to be blocked.
z
BPDU-Protected: BPDU attack guard function
z
Formatfrequency-Protected: MSTP BPDU format frequent change
protection function
display stp history
Syntax
display stp [ instance instance-id ] history [ slot slot-number ]
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 32.
slot slot-number : Displays the historic port role calculation information of the specified IRF member
device. The slot-number argument is the member number of the device in the IRF, which you can
display with the display irf command. The value range for the slot-number argument depends on the
number of members and numbering conditions in the current IRF. If no IRF exists, the slot-number
argument is the current device number.