Slow internet speed in Mikrotik 2011 behind FritzBox 7590

[rg4eger]

Mikrotik 2011 is connected to internet thought FritzBox 7590, internet speed is 40mbs but in FritzBox (provider dsl router) is 250mbs.
What should I check?

[freemannnn]

without knowing much from your config, fasttrack rule in ip/firewall helps on this model. enable it. i have the same router with 100/10 mbps internet speed and works fine..

[kevinds]

Fastpath will help a LOT but I doubt that a RB2011 will be able to do NAT at 250 mbps..

After 125-150 mbps depending on the router’s configuration, it simply didn’t have enough power to do the job..

[Znevna]

RB2011 does well over 800Mbps with FastTrack.
If you don’t use the 100Mbps ports that is.

[rg4eger]

without knowing much from your config, fasttrack rule in ip/firewall helps on this model. enable it. i have the same router with 100/10 mbps internet speed and works fine..

FastTrack in Filter rules & Fast Forward in Bridge is ON

Fastpath will help a LOT but I doubt that a RB2011 will be able to do NAT at 250 mbps..

After 125-150 mbps depending on the router’s configuration, it simply didn’t have enough power to do the job..

The router was already with a fast path.
I have the same router in another office and everything works fine at a speed of 1 gigabit in both directions.