We got some RBs from Mikrotik connected between them through the spf interface (fiber).
The problem is that if i use the Bandwith Test i cant get more than 300 mb/s in TCP mode (UDP is fine) even with high amounts of connections.
The same thing happens with a Speedtest in our local network.Let me try to explain it 
We got a webserver in our main router connected directly and alone in a Gigabit Ethernet port,then if I try to run a test bandwith between another pc connected to Gigabit port too and that webserver the result is the same,no more than 300 mb/s.
What could be the problem?
I tried to change the interfaces’ queue but the result is the same.
Sorry for my english and thx.