Introduction
In this DMVPN article, I am going to implement Direct Internet Access (DIA) in the Remote Site. In initial situation, both edge routers in the Central site advertises the default route over the DMVPN tunnels to the router S2R1 with iBGP. Router S1R1 advertises the default route with a better Local Preference value so that one is installed in the routing table of router S2R1.
Figure 1. Default route from the Central site over the DMVPN WAN.
