We have purchased a second point to point T1 between our central offices and all outer offices from a different carrier coming into a different part of our building, etc for redundancy. We want to also have a second router these T1's terminate into in our central office and need help with suggestiosn on design.
In our central office we'll now have two rotuers (Router A and Router B). Our outer on the other side will be a single router (Router A). For the sake of simplicity I'm going to list one office and not all our differnet variations with other outer offices.
We'll have 3 T1s from one carrier going from Router A in the central office to Router A in the outer office. Then we'll have 1 more T1 (from a seperate carrier) going from Router B in the central office to Router A in the outer office. The point is, 2 routers in central office terminate to 1 router in outer office.
The goal is to have all these links "hot" and load balanced plus failover if one link or carrier goes down.
1. These are all Point to Point links (currenlty we use a multilink setup), no MPLS
2. Some of the links are fractional so they carry voice as well as data.
Please let me know what other info I can provide, we are just looking for advice from anyone who has implemented a similiar setup and what they needed to purchase along with what routing protocols they used.