H3C S7500E Series Command Manual page 203

Command Manual – MSTP
H3C S7500E Series Ethernet Switches
If you specify a port list, this command will display the MSTP information on the
specified ports. The displayed information is sequenced by spanning tree instance
ID, and by port name in each spanning tree instance.
If you specify both a spanning tree instance ID and a port list, this command will
display the MSTP information on the specified ports in the specified spanning tree
instance.
The MSTP status information includes:
CIST global parameters: Protocol work mode, device priority in the CIST instance
(Priority), MAC address, hello time, max age, forward delay, maximum hops,
common root of the CIST, external path cost from the device to the CIST common
root, regional root, the internal path cost from the device to the regional root, CIST
root port of the device, and status of the BPDU guard function (enabled or
disabled).
CIST port parameters: Port status, role, priority, path cost, designated bridge,
designated port, edge port/non-edge port, whether connecting to a point-to-point
link, maximum transmission rate (transmit limit), status of the root guard function
(enabled or disabled), BPDU format, boundary port/non-boundary port, hello time,
max age, forward delay, message age, remaining hops, whether a port in an
aggregation group, and whether rapid state transition enabled (designated ports).
MSTI global parameters: MSTI instance ID, bridge priority of the instance, regional
root, internal path cost, MSTI root port, and master bridge.
MSTI port parameters: Port status, role, priority, path cost, designated bridge,
designated port, remaining hops, whether a port in an aggregation group, and
whether rapid state transition enabled (for designated ports).
The statistics information includes:
The number of TCN BPDUs, configuration BPDUs, RST BPDUs and MST BPDUs
sent from each port
The number of TCN BPDUs, configuration BPDUs, RST BPDUs, MST BPDUs
and wrong BPDUs received on each port
The number of BPDUs discarded on each port
Related commands: reset stp.
Examples
# Display the state information about MSTI 0 on GigabitEthernet 1/0/1 through
GigabitEthernet 1/0/4.
<Sysname>
GigabitEthernet 2/0/4 brief
MSTID
0
0
0
display stp instance
Port
GigabitEthernet2/0/1
GigabitEthernet2/0/2
GigabitEthernet2/0/3
Chapter 1 MSTP Configuration Commands
0 interface GigabitEthernet
Role STP State
DESI FORWARDING
DESI FORWARDING
DESI FORWARDING
1-4
2/0/1 to
Protection
NONE
NONE
NONE