Performing Mcheck; Configuring Digest Snooping - HP 3600 v2 series Configuration Manual

NOTE:
To globally enable or disable the spanning tree feature (not for VLANs), use the stp enable command
•
or undo stp enable command in system view. To enable or disable the spanning tree feature for specific
VLANs, use the stp vlan enable command or undo stp vlan enable command.
• You can disable the spanning tree feature for certain ports with the undo stp enable command to
exclude them from spanning tree calculation and save CPU resources of the device.
In PVST mode, when you globally enable the spanning tree feature the device automatically enables the
•
spanning tree feature for the first
is 128 for the 3600 v2 switch) of the existing VLANs by default. To enable the spanning tree feature for
other VLANs, you must first disable the spanning tree feature for certain VLANs. This guideline does not
apply if the number of existing VLANs on the switch does not exceed

Performing mCheck

If a port on a device that is running MSTP, RSTP, or PVST connects to an STP device, this port automatically
transitions to the STP-compatible mode. However, it cannot automatically transition back to the original
mode under the following circumstances:
The STP device is shut down or removed.
•
The STP device transitions to the MSTP, RSTP, or PVST mode.
•
To forcibly transition the port to operate in the original mode, you can perform an mCheck operation.
The following methods for performing mCheck produce the same result.
Performing mCheck globally
Follow these steps to perform global mCheck:
To do...
Enter system view
Perform mCheck
Performing mCheck in interface view
Follow these steps to perform mCheck in interface view:
To do...
Enter system view
Enter Layer 2 Ethernet interface view or
Layer 2 aggregate interface view
Perform mCheck
NOTE:
An mCheck operation takes effect on a device that operates in MSTP, RSTP, or PVST mode.

Configuring Digest Snooping

As defined in IEEE 802.1s, connected devices are in the same region only when their MST region-related
configurations (region name, revision level, and VLAN-to-instance mappings) are identical. A spanning
n
(which is the number of PVST instances that the switch supports and
Use the command...
system-view
stp mcheck
Use the command...
system-view
interface interface-type
interface-number
stp mcheck
89
n
.
Remarks
—
Required
Remarks
—
—
Required