i'm thinking about using dynamic routing [ OSPF or RIP ] via OpenVPN tunnels. right now i have few offices connected in full mesh, but this is not scalable solution as we add more locations. i would like to avoid situation when plenty of internal traffic is affected if one of two vpn termination points that i plan to use is down.

do you have similar configuration working in production? if so - what routing daemon did you use - quagga? something else? did you encounter any problems?

thanks!