H3C S5120-SI Series Command Reference

1-4
z CIST global parameters: Protocol work mode, device priority in the CIST (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).
z 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, and
whether rapid state transition enabled for designated ports.
z MSTI global parameters: MSTI ID, bridge priority of the MSTI, regional root, internal path cost,
MSTI root port, and master bridge.
z MSTI port parameters: Port status, role, priority, path cost, designated bridge, designated port,
remaining hops, and whether rapid state transition enabled (for designated ports).
The statistics include:
z The number of TCN BPDUs, configuration BPDUs, RST BPDUs and MST BPDUs sent from each
port
z The number of TCN BPDUs, configuration BPDUs, RST BPDUs, MST BPDUs and wrong BPDUs
received on each port
z The number of BPDUs discarded on each port
Related commands: reset stp.
Examples
# View the brief MSTP status and statistics.
<Sysname> display stp instance 0 interface gigabitethernet 1/0/1 to gigabitethernet 1/0/4
brief
MSTID Port Role STP State Protection
0 GigabitEthernet1/0/1 DESI FORWARDING NONE
0 GigabitEthernet1/0/2 DESI FORWARDING NONE
0 GigabitEthernet1/0/3 DESI FORWARDING NONE
0 GigabitEthernet1/0/4 DESI FORWARDING NONE
Table 1-2 display stp brief command output description
Field Description
MSTID MSTI ID in the MST region
Port Port name, corresponding to each 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

H3C S5120-SI Series Specifications

General

Brand	H3C
Model	S5120-SI Series
Category	Switch
Language	English