Thanks Simon,
So to clarify, PPP relies on a higher level layer than what BATMAN uses? So you have to create an ethernet layer 2 interface using l2tp. But are more or less restricted to point to point routing in that case which l2tp will be travelling across. So there's no alternate method you're aware of that can make use of the general broadcast nature of the underlying radio... e.g.. from an application perspective, I can transmit a serial message from one radio and pick that message with multiple receivers?
cheers Peter