Stp Mode - H3C S5120-SI Series Command Reference Manual

If a port on a device running MSTP (or RSTP) connects to a device running STP, this port will
automatically migrate to the STP-compatible mode. However, it will not be able to migrate automatically
back to the MSTP (or RSTP) mode, but will remain working in the STP-compatible mode under the
following circumstances:
The device running STP is shut down or removed.
The device running STP migrates to the MSTP (or RSTP) mode.
By then, you can perform an mCheck operation to force the port to migrate to the MSTP (or RSTP)
mode.
Note that:
The device works in STP-compatible mode, RSTP mode or MSTP mode depending on the MSTP
mode setting.
The stp mcheck command is meaningful only when the device works in RSTP or MSTP mode.
Configured in system view, the setting takes effect globally; configured in Layer 2 Ethernet port
view, the setting takes effect on the current port only; configured in port group view, the setting
takes effect on all member ports in the port group.
Configured in Layer 2 aggregate port view, the setting takes effect only on the aggregate port;
configured on a member port in an aggregation group, the setting can take effect only after the port
leaves the aggregation group.
Related commands: stp mode.
Examples
# Carry out mCheck on GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] stp mcheck

stp mode

Syntax
stp mode { stp | rstp | mstp }
undo stp mode
View
System view
Default Level
2: System level
Parameters
stp: Configures the MSTP-enabled device to work in STP-compatible mode.
rstp: Configures an MSTP-enabled device to work in RSTP mode.
mstp: Configures an MSTP-enabled device to work in MSTP mode.
Description
Use the stp mode command to configure the MSTP work mode of the device.
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