3Com Switch 4500 Family Manual page 204

4) MSTI port parameters: Port state, role, priority, path cost, designated bridge, designated port,
remaining hops, and the number of VLANs mapped to the current MSTI.
The statistical information includes: the numbers of the TCN BPDUs, the configuration BPDUs, the RST
BPDUs, and the MST BPDUs transmitted/received by each port.
Related commands: reset stp.
Examples
# Display the brief state information of MSTI 0 on Ethernet 1/0/1 through Ethernet 1/0/4.
<Sysname> display stp instance 0 interface Ethernet 1/0/1 to Ethernet 1/0/4 brief
MSTID Port
0 Ethernet1/0/1
0 Ethernet1/0/2
0 Ethernet1/0/3
0 Ethernet1/0/4
Table 1-2 Description on the fields of the display stp brief command
Field
MSTID
Port
Role
STP State
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
Bridge Times
CIST Root/ERPC
CIST RegRoot/IRPC
CIST RootPortId
Role
ALTE
DESI
DESI
DESI
ID of an MSTI in the MST region
Port index corresponding to an MSTI
Port role, which can be one of the following:
ALTE: The port is an alternate port
BACK: The port is a backup port
ROOT: The port is a root port
DESI: The port is a designated port
MAST: The port is a master port
DISA: The port is disabled
MSTP state on the port , which can be:
FORWARDING: The port learns MAC addresses and forwards
user traffic
DISCARDING: The port does not learn MAC addresses or
forward user traffic
LEARNING: The port learns MAC addresses but does not
forward user traffic
Protection type of the port, which can be one of the following:
ROOT: Root protection
LOOP: Loop protection
BPDU: BPDU protection
NONE: No protection
:32768.00e0-fc12-4001
:Hello 2s MaxAge 20s FwDly 15s MaxHop 20
:32768.000f-cb00-6600 / 200
:32768.00e0-fc12-4001 / 0
:128.22
STP State Protection
DISCARDING LOOP
FORWARDING NONE
FORWARDING NONE
FORWARDING NONE
Description
1-4