Performing mcheck operation, Configuration prerequisites, Configuration procedure – H3C Technologies H3C S3100 Series Switches User Manual

Page 253: Perform the mcheck operation in system view, Perform the mcheck operation in ethernet port view, Configuration example, 34 configuration procedure, 34 configuration example

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Performing mCheck Operation

Ports on an MSTP-enabled switch can operate in three modes: STP-compatible, RSTP-compatible,
and MSTP.

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:

z

The device running STP is shut down or removed.

z

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.

Configuration Prerequisites

MSTP runs normally on the switch.

Configuration Procedure

You can perform the mCheck operation in the following two ways.

Perform the mCheck operation in system view

Follow these steps to perform the mCheck operation in system view:

To do...

Use the command...

Remarks

Enter system view

system-view

Perform the mCheck operation

stp

[ interface interface-list ]

mcheck

Required

Perform the mCheck operation in Ethernet port view

Follow these steps to perform the mCheck operation in Ethernet port view:

To do...

Use the command...

Remarks

Enter system view

system-view

Enter Ethernet port view

interface

interface-type

interface-number

Perform the mCheck operation stp mcheck

Required

Configuration Example

# Perform the mCheck operation on Ethernet 1/0/1.

1) Perform this configuration in system view

<Sysname> system-view

[Sysname] stp interface Ethernet 1/0/1 mcheck

2) Perform this configuration in Ethernet port view

<Sysname> system-view

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