A third party provider supplies connectivity my remote satellite campus over metro ethernet. Due to red tape the provider is required to supply a routed point-to-point connection (R2 and R3) to the satellite campus; ideally the provider would bridge my private WAN to the satellite campus (R1 and R4) but this is not an option for the aforementioned reason.
My goal is to incorporate the satellite campus into my AS with little or no assistance from the provider. Currently when I create a new network that must be routed through the provider, I must call and ask the provider to install the new route, which they then distribute between R2 and R3 using EIGRP. This process is often difficult and prone to human error.
I do no trust the provider to be an ABR since I cannot filter the incoming routes. I have considered using an IPIP tunnel between R1 and R4, but I am unsure how the policing performed by the provider will affect the traffic. This would enable me to run OSPF in the tunnel.
My primary limitation is the provider and the added fact that OSPF is the only dynamic protocol I have available on the existing hardware.