In previous versions of RouterOS this value was setable on ethernet interfaces. It check to see if the interface is up or down, and is important for directly connected routes. The default for some STRANGE reason is set to yes, that is the checking of the interface link state is disabled.
In verion 3.0 of the manual it says this setting is available in the manual, but when looking in the RouterOS, the value is not displayed nor can be set.
This is a major flaw of RouterOS and needs to be fixed.
Has it been moved somewhere?
If not, it needs to be introduced back into the code or at least set to a default of no.