Spanning Tree Variations; Implementation Information; Configure Multiple Spanning Tree Protocol - Dell S3048-ON Configuration Manual

• Enable Multiple Spanning Tree Globally
• Adding and Removing Interfaces
• Creating Multiple Spanning Tree Instances
• Influencing MSTP Root Selection
• Interoperate with Non-Dell Bridges
• Changing the Region Name or Revision
• Modifying Global Parameters
• Modifying the Interface Parameters
• Configuring an EdgePort
• Flush MAC Addresses after a Topology Change
• MSTP Sample Configurations
• Debugging and Verifying MSTP Configurations

Spanning Tree Variations

The Dell Networking OS supports four variations of spanning tree, as shown in the following table.
Table 42. Spanning Tree Variations
Dell Networking Term
Spanning Tree Protocol (STP)
Rapid Spanning Tree Protocol (RSTP)
Multiple Spanning Tree Protocol (MSTP)
Per-VLAN Spanning Tree Plus (PVST+)

Implementation Information

MSTP is implemented as follows in Dell Networking OS:
• The Dell Networking OS MSTP implementation is based on IEEE 802.1Q-2003 and interoperates only with bridges that also use this
standard implementation.
• MSTP is compatible with STP and RSTP.
• Dell Networking OS supports only one MSTP region.
• When you enable MSTP, all ports in Layer 2 mode participate in MSTP.
• You can configure 64 MSTIs including the default instance 0 (CIST).

Configure Multiple Spanning Tree Protocol

Configuring multiple spanning tree is a four-step process.
1 Configure 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.
498 Multiple Spanning Tree Protocol (MSTP)
IEEE Specification
802 .1d
802 .1w
802 .1s
Third Party