What attributes must match for Multiple Spanning Tree (MST) to function properly?

For Multiple Spanning Tree (MST) to function correctly, all critical attributes must align across all participating switches. The MST configuration is based on these specific attributes, ensuring consistent network topology and preventing loops.

The MST Configuration Name serves as an identifier for the MST region. All switches that need to participate in the same MST region must have the same configuration name, allowing them to recognize and treat each other as part of the same topology.

The MST Revision Number is essential because it indicates the version of the configuration being used. If switches in the same MST region have different revision numbers, they will not synchronize their MST configurations, leading to potential loops or instability.

Lastly, the MST Instance to VLAN Mapping is crucial because it determines which VLANs are associated with each MST instance. If the mappings do not match, switches may treat VLAN traffic inconsistently, creating unpredictable behavior and possible VLAN segregation issues.

In summary, all these attributes must match on switches participating in the same MST region to ensure proper functionality and maintaining a loop-free environment. This comprehensive requirement supports stable and efficient network operation.