Hugo Mills wrote:
> Out of interest, what do you get from running "sudo arp -n" on each
> machine? It's possible that there's something else on the network with
> the same IP address.
Another possibility is that the ssh service has simply hung or has not
come up properly after a reboot.
Once you have eliminated the possible issues Hugo has outlined you are
pretty much at the point where you need to reboot and investigate with a
screen attached, if the reboot doesn't bring the ssh service up and
allow you in that way.
Sean