H3C Technologies H3C S7500E Series Switches - Manual (Page 184)

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To do... Use the command... Remarks
Enable output of port state transition
information
stp port-log { all | instance
instance-id }
Required
This function is enabled by default.
Enabling the MSTP Feature
You must enable MSTP for the device before any other MSTP-related configurations can take effect.
Make this configuration on the root bridge and on the leaf nodes separately.
Follow these steps to enable the MSTP feature:
To do... Use the command... Remarks
Enter system view system-view —
Enable the MSTP feature globally stp enable
Required
MSTP is globally disabled by
default.
Enter Ethernet
interface view, or
Layer 2 aggregate
interface view
interface interface-type
interface-number
Enter interface
view or port
group view
Enter port group view
port-group manual
port-group-name
Required
Use either command.
Enable the MSTP feature for the ports stp enable
Optional
By default, MSTP is enabled for
all ports after it is enabled for
the device globally.
To control MSTP flexibly, you can use the undo stp enable command to disable the MSTP feature for
certain ports so that they will not take part in spanning tree calculation and thus to save the CPU
resources of the device.
Performing mCheck
MSTP has three working modes: STP compatible mode, RSTP mode, and MSTP mode.
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