Thanks for the responses folks! Andy, I ran into the same problem a
while back (re. local subnet) and now have the same configuration (more
or less) as you.
I just upgraded to 1.22 on both ends. It took about 10 minutes for them
to sort things out, but the tunnels are back up. We'll see if i get any
better luck this time.
If i implement something to detect the dead tunnel, is there a way for
me to clear/reinstate it by poking something at m0n0? If i bring the P2
lifetime down (say 8 hours), what would the effect be? Would it
continue to reestablish the tunnel?