I have three sites. Site A is production and is connected to sites B & C with seperate T1s. Likewise, site's B & C are connected via an additional T1, therefore forming a triangle between the three sites.
Instead of having (1 x T1) between each site, I would like to be able to take advantage of the topology in order to effectively provide (2 x T1) bandwidth between the production site, A, and the remote sites, B & C the sites without using policy-based routing.
For instance, if the link between A & B is saturated, I would like the system to dynamically utilize the link from A --> C --> B. I set up a test lan running a basic OSPF configuration to see if OSPF would handle the balancing, however, even with the A --> B link saturated, the A --> C --> B link went unutilized.
Is OSPF capabable of handling this design requirement? It is not mandatory that I use OSPF, I am open to any and all routing protocol suggestions. As I only have rudimentary Cisco routing skills and cannot find any good documentation on the web, please provide as many details as possible.
The routers in use are Cisco 2600 series running IOS 12.3
Please see the following link for a graphical depiction: