Administrator Guide

• Interoperate with Non-Dell Networking OS Bridges
• Modifying Global Parameters
• Modifying the Interface Parameters
• Conguring an EdgePort
• Conguring Fast Hellos for Link State Detection
• Flush MAC Addresses after a Topology Change
• MSTP Sample Congurations
• Debugging and Verifying MSTP Congurations
Congure Multiple Spanning Tree Protocol
Conguring multiple spanning tree is a four-step process.
1 Congure interfaces for Layer 2.
2 Place the interfaces in VLANs.
3 Enable the multiple spanning tree protocol.
4 Create multiple spanning tree instances and map VLANs to them.
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
• 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
Multiple Spanning Tree Protocol (MSTP)
571