Users Guide

Parameters region-name — Enter a name for an MST region. A maximum of 32 characters.
Default System MAC address
Command Mode MULTIPLE-SPANNING-TREE
Usage Information By default, the MST protocol assigns the system MAC address as the region name. Two MST devices within the
same region must share the same region name, including matching case.
Example
OS10(conf-mst)# name my-mst-region
Supported
Releases
10.2.0E or later
revision
Configures a revision number for the MSTP configuration.
Syntax
revision number
Parameters number — Enter a revision number for the MSTP configuration, from 0 to 65535.
Default 0
Command Mode MULTIPLE-SPANNING-TREE
Usage Information To have a bridge in the same MST region as another, the default values for the revision number must match on all
Dell EMC hardware devices. If there are non-Dell EMC devices, ensure the revision number value matches on all
the devices. For more information, see Non-Dell Hardware.
Example
OS10(conf-mst)# revision 10
Supported
Releases
10.2.0E or later
spanning-tree mst
Configures an MST instance and determines root and bridge priorities.
Syntax
spanning-tree mst instance number priority | root {primary | secondary}
Parameters
• instance number — Enter an MST instance number, from 0 to 63. For Mt. Echo platform, enter a MST
instance value from 0 to 61.
• priority priority value — Set a bridge priority value in increments of 4096, from 0 to 61440. Valid
priority values are: 0, 4096, 8192, 12288, 16384, 20480, 24576, 28672, 32768, 36864, 40960, 45056, 49152,
53248, 57344, and 61440. All other values are rejected.
•
root — Enter a primary or secondary root.
• primary — Enter a device as a primary root.
• secondary — Enter a device as a secondary root.
Default Not configured
Command Mode CONFIGURATION
Usage Information The MSTP determines the root bridge but you can assign one bridge a lower priority to increase the probability it
being the root bridge. A lower priority-value increases the probability of the bridge becoming a root bridge.
The no version of this command resets the value to the default.
Example
OS10(config)# spanning-tree mst 0 priority 0
OS10(config)# spanning-tree mst 2 root primary
Supported
Releases
10.2.0E or later
450 Layer 2