Downshift

With this setting you enable or disable automatic adjustment of the connection speed to the employed infrastructure for the specified Ethernet port. By enabling downshift, you allow the device to operate an Ethernet link with a lower transmission rate if the available speed is lower due to the cabling.

If, for example, two Gigabit-capable devices are connected with a cable which is not fully wired, both devices will initially attempt to establish a Gigabit link. Since Gigabit Ethernet in contrast to Fast Ethernet (10 or 100 Mbit) requires all four pairs of wires, the connection will fail. In this case, the downshift feature makes it possible to automatically fall back to the maximum possible transmission rate of the cable.

You can check whether downshift is available for an Ethernet link in the status menu under Ethernet-Ports > Ports.