[En-Nut-Discussion] media sense/cable detect

[Harald Kipp]

Hi Austin,

>         If the link is down it should flag packets going to that interface
>with an icmp network unreachable, or something like that. The received icmp
>should be interpreted by the device as being a good reason to close the
>connection. Or something like that. I'm not _that_ familiar with the
>exact method.

Grumble...[Very small font]Ethernut doesn't handle this ICMP
message. Quite tricky to implement without destroying the layered
design[/Very smal font]

But, if I didn't misunderstood, the problem is on the receiver
side. The receiver will not notice a cut link and may hang
forever.

Harald