Thanks a lot, that was one of the things i switched off because i dont need ist (RSTP).

Now everything is as expected

Im running a RB5009UG+S+ and CRS354-48G-4S+2Q+, the Switch connected wird SPF+ and Untagged Default and Tagged VLans to the Router. Both running current RouterOS 7.1.3. My Problem: Neighbors discovery is switched on at both, with all protocols and Interface "!Dynamic" In first place, the S...

I'm running 2.13 on CRS354-48G-4S+2Q+RM:
- Fans running nearly all-time on Full Speed, with ROS they were runnig slowlier.
- SNMP only reporting 2 FANs (of 3) and 1 Temp (of 2).

Any hints on this two topics?

I'm waiting to buy the device until a SwOS Release is in clear sight...

The currently running Aruba Switch Firmware pisses me off but without SwOS there is no real improvement in easy and even more fast managability.