Now that we have covered many examples of L3VPN and for different customer deployments, I think this is a good point where we introduce the concept of Route Leaking. Notice in our DIAGRAM, only sites that belong to the same customer could reach each other and this is of course the required end result. But let assume for whatever reason we needed to change this behavior, now Customer C needs to reach Customer D and vice versa. This means, all four sites need to have full connectivity among each other. Simply put, we will need to leak Customer C's VRF routes into Customer D's VRF route table and vice versa. As always, things will get clearer with configuring this part: Just to confirm, at