Administrator Guide

Related Conguration Tasks
The following are the related conguration tasks for MSTP.
• Creating Multiple Spanning Tree Instances
• Adding and Removing Interfaces
• Inuencing MSTP Root Selection
• Interoperate with Non-Dell Networking OS Bridges
• Changing the Region Name or Revision
• Modifying Global Parameters
• Modifying the Interface Parameters
• Conguring an EdgePort
• Flush MAC Addresses after a Topology Change
• Debugging and Verifying MSTP Congurations
• Prevent Network Disruptions with BPDU Guard
• Enabling SNMP Traps for Root Elections and Topology Changes
• Conguring Spanning Trees as Hitless
Enable Multiple Spanning Tree Globally
MSTP is not enabled by default. To enable MSTP globally, use the following commands.
When you enable MSTP, all physical, VLAN, and port-channel interfaces that are enabled and in Layer 2 mode are automatically part of the
MSTI 0.
• Within an MSTI, only one path from any bridge to any other bridge is enabled.
• Bridges block a redundant path by disabling one of the link ports.
1 Enter PROTOCOL MSTP mode.
CONFIGURATION mode
protocol spanning-tree mstp
2 Enable MSTP.
PROTOCOL MSTP mode
no disable
Example of Verifying MSTP is Enabled
To verify that MSTP is enabled, use the show config command in PROTOCOL MSTP mode.
Dell(conf)#protocol spanning-tree mstp
Dell(config-mstp)#show config
!
protocol spanning-tree mstp
no disable
Dell#
Adding and Removing Interfaces
To add and remove interfaces, use the following commands.
To add an interface to the MSTP topology, congure it for Layer 2 and add it to a VLAN.
If you previously disabled MSTP on the interface using the no spanning-tree 0 command, to enable MSTP, use the following
command.
Multiple Spanning Tree Protocol (MSTP)
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