Getting 10Mbps rx/5Mbps tx with MikroTik CPE on a 20Mbps full duplex link. Connecting my laptop directly to the ISP CPE or testing with a spare NetGear firewall I get 20Mbps duplex but when using MikroTik as router I get 10Mbps download & 5Mbps upload. Tested with 2 x RB750, RB 3011, latest firmware, no luck with the MikroTik. No difference when playing around with MTU value while doing WAN MikroTik to MikroTik speedtests. We have other branches on the same ISP with 40Mbps full duplex links also running on MirkoTik CPE - no issues. Pretty sure I am missing something simple. Kindly assist.
You don’t mention the hardware, and I don’t see an export of your configuration.