Display Stp Portdown - 3Com Switch 4500 Family Manual

Parameters
None
Description
Use the display stp abnormalport command to display the ports that are blocked by STP guard
functions.
Examples
# Display the ports that are blocked by STP guard functions.
<Sysname> display stp abnormalport
MSTID Port
--------- --------------------
0 Ethernet1/0/20
1 Ethernet1/0/21
Table 1-4 Description on the fields of the display stp abnormalport command
Field
MSTID
Port
Block Reason

display stp portdown

Syntax
display stp portdown
View
Any view
Parameters
None
Description
Use the display stp portdown command to display the ports that are shut down by STP guard
functions.
Examples
# Display the ports that are shut down by STP guard functions.
<Sysname> display stp portdown
Port
---------------------
Block Reason
-------------
Root-Protection
Loop-Protection
MSTI ID in the MST region
Port that has been blocked
The function blocking the port:
Root-Protected: root guard function
Loop-Protected: loop guard function
Formatcompatibility-Protected:
incompatibility protection function
Down Reason
------------
1-7
Description
MSTP BPDU format