Enabling Output Of Port State Transition Information; Enabling The Mstp Feature; Performing Mcheck; Configuration Prerequisites - 3Com MSR 50 Series Configuration Manual

474 C 23: MSTP C
HAPTER
Enabling Output of Port
State Transition
Information
Enabling the MSTP
Feature

Performing mCheck

Configuration
Prerequisites

Configuration Procedure

Configuration Example

ONFIGURATION
Refer to "Enabling the Output of Port State Transition Information" on page
Refer to "Enabling the MSTP Feature" on page
Ports on an MSTP-compliant device have three working modes: STP compatible
mode, RSTP mode, and MSTP mode.
In a switched network, if a port on the device running MSTP (or RSTP) connects to
a device running STP, this port will automatically migrate to the STP-compatible
mode. However, if the device running STP is removed, this will not be able to
migrate automatically to the MSTP (or RSTP) mode, but will remain working in the
STP-compatible mode. In this case, you can perform an mCheck operation to force
the port to migrate to the MSTP (or RSTP) mode.
You can perform mCheck on a port through two approaches, which lead to the
same result.
MSTP has been correctly configured on the device.
Perform global mCheck
Follow these steps to perform global mCheck:
To do...
Enter system view
Perform mCheck
Perform mCheck in Ethernet interface view
Follow these steps to perform mCheck in Ethernet interface view:
To do...
Enter system view
Enter Ethernet interface view
Perform mCheck
c
CAUTION: The stp mcheck command is meaningful only when the device works
in the MSTP (or RSTP) mode, not in the STP-compatible mode.
# Perform mCheck on port Ethernet 1/0.
Method 1: Perform mCheck globally.
<Sysname> system-view
[Sysname] stp mcheck
469.
Use the command...
system-view
stp mcheck
Use the command...
system-view
interface interface-type
interface-number
stp mcheck
469.
Remarks
-
Required
Remarks
-
-
Required