If you're seeing issues with `show spanning-tree` and frequent port changes, first check physical connections and ensure trunk links are set with the correct VLANs. Enable `spanning-tree portfast` on end device ports, set proper bridge priorities, an...

To fix frequent STP topology changes, you should start by using the `show spanning-tree` command to identify any problematic ports. Then, check the physical connections to ensure there are no faults and that everything is stable. It's also important ...