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We are experimenting with VRF technology as a solution to support different IP services (corporate, scada, etc) over a single infrastructure, with local isolation needed between them. A coworker suggested I use DMVPN to permit dynamic tunnel creation for these services. I was successful in getting two remotes to dynamically connect to the head end over a single tunnel, supporting the 'corporate' IP service. I wanted to get another IP service out there, and went down the path of a second DMVPN config..however, no luck. I tried different combinations of using loopback IPs and interface IPs to terminate the tunnels on, but mostly I ended up killing the original working tunnel. I wonder if parallel dynamic tunnels just aren't supported, or if there is a trick to making this work that I have not yet discovered?

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My understanding is, it should be possible, but I had a heck of a time getting DMVPN to work with VRF, in my case just one VRF instance (beside the global).  Cisco's documentation is sparse on these type of configurations, and what you exactly need to make it work isn't well documented.  In my case, found the magic combination after much trial and error.

My working config is posted in this thread: