Ok, i am trying to fix a network. Right now it is setup with OSPF. There are 6 "core" routers in 6 seperate offices (mix of 1841's and 2811's). These routers all have VPN tunnels between them to make a full mesh. Connected to 2 of these "core" 2811's is about 10 871w's (these are spread around the country in jobsite trailers). Each of the 871w's need access to all the servers on the "core" network but not nessarly each other.
Here is my problem. We are looking to get a ton more of the 871w's in the next 2 years (around 50 total). I know OSPF won't handle this load very good due to the amount of areas we will need to setup and run. what is a better choice? I have heard running EIGRP for everything and also OSPF for the "core" and then EIGRP for the 871w's. I do have adv IP service on each router.