Respectfully disagree. i have upgraded RB450Gx4 without issues. used the IOS app to trigger upgrade in my case (home setup).I had issues with:
- 1 x RB450Gx4 that after the upgrade never came back online (it's 30 KM away from where I am)
recent one RB260GS(CSS106-5G-1S) which supports up to SwOS 2.13have you discarded STP/RSTP issues? which version of SwOS are you using?
is OLD RB260GS which supports only up to SwOS 1.7 or the later version RB260GS(CSS106-5G-1S) which supports up to SwOS 2.13 ?
Reboot did not help. Any specific logging levels on rb450gx4? Just had dhcp logging level on apart from standard log levels .And nothing else about that device or ethernet port through which it connects?
Did you try to reboot RB260GS?
Try enabling this:
Screenshot 2022-02-25 115545.png