Configure Multiple Spanning Tree Protocol (MSTP)

MSTP (802.1s) ensures that only one active path exists between any two nodes in a spanning-tree instance. A spanning-tree instance comprises a unique set of VLANs. MSTP instances significantly improve network resource utilization while maintaining a loop-free environment.

Configuration commands

(sw#) Enable MSTP (default mode for spanning-tree):

spanning-tree mode mst
name my-mstp-region
revision 0

(sw#) Show commands to validate functionality:

show spanning-tree mst

Expected results

  1. spanning-tree mode is configured
  2. spanning-tree is enabled, if loops are detected ports should go blocked state
  3. spanning-tree splits traffic domain between two DUTs

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