A whole subnet is down after plugging in a new switch
Spanning Tree found a loop or blocked the wrong port.
Try this first
- 1Check which port shows BLOCKING in the switch
- 2Unplug the suspect uplink
- 3Enable BPDU guard on edge ports
When to bring us in
We can stabilize STP and root bridge if it stays unstable.
See also
- Wi-Fi drops randomly across the officeFirst rule out whether it is the access points or the internet connection itself. Different fix.
- One room or corner has no or bad Wi-FiNot always "add another AP"; often one is poorly positioned, or there is a metal wall in the way.
- Internet is suddenly slow for everyoneThree suspects: your provider, a colleague soaking the line, or a backup or update kicking in unexpectedly.
None of the above fits?
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