Connecting via tunnels to a few (2+) neighbours and running BGP with private
AS INSIDE ampr would be an answer.
It must not necessarily be public BGP routing.
This works neatly. Except the whole IPIP stuff, I have at the moment a l2tp
tunnel to the German hamnet, and one PPtP to Luxembourg, both doing BGP
dynamic routing (again, these are private AS, for route frowarding inside
the ampr space ONLY).
But for this to happen, everyone must allow forwarding through their
gateways.
And here I have my doubts.
MArius, YO2LOJ