3com 5500-ei pwr Reference Guide
1-5
<Sysname> display stp instance 0 interface Ethernet 1/0/1 to Ethernet 1/0/4 brief
MSTID Port Role STP State Protection
0 Ethernet1/0/1 ALTE DISCARDING LOOP
0 Ethernet1/0/2 DESI FORWARDING NONE
0 Ethernet1/0/3 DESI FORWARDING NONE
0 Ethernet1/0/4 DESI FORWARDING NONE
Table 1-2 Description on the fields of the display stp brief command
Field
Description
MSTID
ID of an MSTI in the MST region
Port
Port index corresponding to an MSTI
Role
Port role, which can be one of the following:
z
ALTE: The port is an alternate port
z
BACK: The port is a backup port
z
ROOT: The port is a root port
z
DESI: The port is a designated port
z
MAST: The port is a master port
z
DISA: The port is disabled
STP State
MSTP state on the port , which can be:
z
FORWARDING: The port learns MAC addresses and forwards
user traffic
user traffic
z
DISCARDING: The port does not learn MAC addresses or
forward user traffic
forward user traffic
z
LEARNING: The port learns MAC addresses but does not
forward user traffic
forward user traffic
Protection
Protection type of the port, which can be one of the following:
z
ROOT: Root protection
z
LOOP: Loop protection
z
BPDU: BPDU protection
z
NONE: No protection
# Display the detailed MSTP status information and statistics information.
<Sysname> display stp instance 0 interface Ethernet 1/0/2
-------[CIST Global Info][Mode MSTP]-------
CIST Bridge :32768.00e0-fc12-4001
Bridge Times :Hello 2s MaxAge 20s FwDly 15s MaxHop 20
CIST Root/ERPC :32768.000f-cb00-6600 / 200
CIST RegRoot/IRPC :32768.00e0-fc12-4001 / 0
CIST RootPortId :128.22
BPDU-Protection :disabled
TC-Protection :enabled / Threshold=6
Bridge Config
Digest Snooping :disabled
TC or TCN received :0
Time since last TC :0 days 1h:33m:54s
----[Port2(Ethernet1/0/2)][DOWN]----
Port Protocol :enabled