Hi all,

I have a speed issue with my CRS328-24p-4s+rm, when connected via SFP+ ports.
I have a server connected via SFP+ Fiber cable (10Gbps) to the crs328-24p-4s+rm and a direct copper link to the ISP Router (1Gbps).
I realized some internal speed problems and if I do a basic Internet speed test, the Download speed is between 3-6 Mbps when executed from the Server (or any other device connected via SFP+)? If i connect the server via normal Copper RJ45 cable, the Internet Speed is maxed out.
Just for further testing, i switched the OS to SWOS, and there I have no issues with the Fiber SFP+ ports.
Is there any setting in RouterOS, which need to be de/activated?

crs328-24p-4s+rm
RouterOS: 6.45.2
I reset the configuration, so no additional settings are active...

Thanks in advance for your help.

Try downgrading to 6.44.5 long term version, suggest using netinstall to do downgrade

Try downgrading to 6.44.5 long term version, suggest using netinstall to do downgrade

Thanks for the suggestion CZFan, I downgraded and 6.44.5 is running now - unfortunately still the same performance.
The weird part is that the download (~0.36 Mbps) is way slower than the Upload (93 Mbps) - for me the Upload is performing as it should - just the download has speed problems

Any other suggestion?