Hi there!
I use RB450GX4 as my router and it's running RouterOS 7.8. I have 3 WANs on ether2, ether3, ether5. ether1 and ether4 are connected to switches.
I get these speeds,
1. ~930mbps(over IPv4) and ~900mbps(over IPv6) from device A connected to switch A to device B connected to switch B where both devices A and B are in the same VLAN,
2. ~390-400mbps from device A connected to switch A to device B connected to switch B where both devices A and B are in different VLANs.
I am trying to figure out if 400mbps inter-vlan traffic is the limit for this device or if I have made an error and I can get more performance out of it?
The CPU usage is around ~5% when the devices are in the same VLAN and goes up to 30% when they are in different VLANs.
My config is here,