Hi.
Hex Gr3, RB2011, RB960PGS and other models
The problem is overloading one of the ports.
The software version does not matter.The last checked is 6.46.1

If the PC sets up the link on 10Mbps (this also applies to the port set to 100Mbps) and uses it 100%, the signal from MT A to MT B has excessive packet times (~ 30ms), packet loss is observed, although the CPU in MT A is not overloaded.
This problem occurs both in router mode and in bridge mode.
Hardware offload is disabled.
Is this a software problem?