please solve 10Mbps ethernet problem because I have 7 Rb1100x2Ah and I have problems on 4 off them.. that’s tooo bad.. please solve it..
All time it’s going from 10 to 100 then to 1Gb and again to 10… driving us crazy 
Very well described problem, notice the part where you describe what routeros and bios [firmware] version you have.
Without ignoring the part where you describe what hardware you connect to RB1100AHx2 to get this problem.
This is sarcasm…?
RB1100x2AH firm:3.10 RouterOS 6.17
Having problem with
RB411GL firm:3.18 RouterOS 6.17
- sxt lite2 (after power down switch to 10mbit) only restart help. on all 6.x versions
It seems that after changing ethernet cable to new Cat7 Shielded with shielded module, port flapping vanished 
Hi I have same problem on several mikrotik You try cat6 ? or only cat7 solved problem ? thanks
We where changing in the past all of our patch cables to CAT.6a, the length does no matter, we
changed all of them and the positive effect we where seeing was, that at all used MikroTik devices
many of the told above problems where gone from one to the other second.
Ok by the way we a re using S/SFTP cables as patch cables now.
Hardware from other vendors was not infected by this problem.
Same problem on SXT Lite 5 , after several restarts, it connects to 100mb