UniFi RSTP Issues
Hello all! I am working on setting up new USW Flex 2.5G 8 PoE switches at my friend's marina and am running into some weird RSTP issues.
We have a USW Pro Max 24 PoE as the core switch for the network (Layer 3 is still handled on the UDM SE) and it's RSTP priority is set to 4096. Whenever I connect an unadopted or already adopted USW Flex 2.5G 8 PoE to the core switch, we lose all network connectivity for every bit of 30 seconds.
Assuming this is RSTP reconvergence, but why? I've setup RSTP on several other UniFi networks (along with HPE/Aruba CX) and have never had this problem. I don't see anything obvious in the config that I've got wrong, but apparently something is not right.
Topology:
- UDM SE
- USW Flex (printers)
- USW Flex (spare)
- USW Pro Max 24 PoE
- USW Flex 2.5G 8 PoE
Any thoughts and feedback is really appreciated! Thank you!