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![Ticket#18 – Spanning Tree Topology Change Flood: Root Guard Protects Core Switch [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/07/Ticket18-–-Spanning-Tree-Topology-Change-Flood-Root-Guard-Protects-Core-Switch_networkjourney.png)
Problem Summary A large enterprise network started experiencing random connectivity drops across departments. Printers became unreachable, VoIP calls dropped, and some switches rebooted due to CPU spikes. On closer inspection, the Spanning Tree topology kept changing every few seconds. Logs across core switches showed constant […]
