> By the way, as I have never used sl(4) nor strip(4), I wonder what
> clonification changed, beside the fact that the user has to create
> the interface by hand.

Based on my rather limited experience with them, "nothing".

> My reading of slattach.c seems to indicate that currently (and
> independently from the fact that sl(4) is clonable) there is no way
> to tell for sure which interface it has attached to.

> Am I correct?

I think so.  This has been true approximately forever, and, in
particular, was true before sl was clonable.

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