We are not in a real mesh. We are in a star topology
from each node.
A real mesh would mean that each node knows its neighbourgs (of course ) AND
is also
Able to handle traffic for its neighbourgs. That not the case if I'm right.
This is not right, the IPIP network (at least when properly implemented) is
a full mesh. All nodes can send traffic to all other nodes without having
to rely on a central node or a neighbor other than the destination.
Technically one can even send traffic to "the wrong node" and it might forward
it to the correct endpoint, but that is not guaranteed to work because not all
nodes allow that in their firewall rules.
The only thing that operates in a star fashion is the distribution of routing
information using RIP. It would be perfectly possible to setup a second node
that sends this same information, to cover the case where that central node
goes down and the other nodes gradually lose their routing info.
Rob