When executing the vanet-routing-compare script with internet routing disabled (i.e., --run "src/wave/examples/vanet-routing-compare --protocol=0", there are still RREQ msgs being sent.

I think this is a bug.  (Or maybe it is a feature).  For IP-routing, the internet stack is installed onto every node.  However, with routing disabled by --protocol=0, no data is then submitted for routing through the network.  However, this doesn't seem to be preventing the initial route request messages from being sent (RREQ).  However, I think they are unanswered (i.e., no RREP).  Nonetheless, this is unnecessary overhead.

Furthermore, the use of IP addresses is used to determine the sender node for every received packet.  An alternative would be to instead use the MAC address to resolve sender / receiver, but this will require some refactoring of the code.