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Version Description
8.3.16.1 Introduced on the MXL 10/40GbE Switch IO Module.
Usage
Information
For two MSTP switches to be within the same MSTP region, the switches must share the same region
name (including matching case).
Related
Commands
msti — maps the VLAN(s) to an MST instance.
revision — assigns the revision number to the MST configuration.
port-channel path-cost custom
Sets the path cost to be constant for port-channel regardless of its operation status.
Syntax
port-channel path-cost custom
To change the path cost to comply with new IEEE standard behavior, use no port-channel path-
cost custom command.
Defaults Disabled
Command Modes SPANNING TREE
Command
History
This guide is platform-specific. For command information about other platforms, see the relevant Dell
EMC Networking OS Command Line Reference Guide.
Version Description
9.13(0.1) Introduced on MXL, FN IOM, S6000, S3100, S4810, S4820T, S3048–ON, S4048–
ON, S4048T-ON, S6000–ON, S6010–ON, S6100–ON, S5048F-ON, C9010, and
Z9100–ON,
Usage
Information
This command is used to keep the port-channel path cost constant regardless of the operational status of
the port-channel member ports.
This command is supported in all STP modes such as STP, RSTP, MSTP, and PVST.
The command behavior does not change when a new member port is added to the port-channel or an
existing member port is deleted from the configuration. The path cost reflects the cumulative speed of
the port-channel member ports.
Example
DELLEMC(conf)#protocol spanning-tree pvst
DELLEMC(conf-pvst)#port-channel path-cost custom
protocol spanning-tree mstp
To enable and configure the multiple spanning tree group, enter MULTIPLE SPANNING TREE mode.
Syntax
protocol spanning-tree mstp
To disable the multiple spanning tree group, use the no protocol spanning-tree mstp command.
Defaults Not configured.
Command Modes CONFIGURATION
Supported Modes Full–Switch
Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
8.3.16.1 Introduced on the MXL 10/40GbE Switch IO Module.
780 Multiple Spanning Tree Protocol (MSTP)