Multiple Frame Relay Switches using GRE Tunnel for Cisco Lab
This is the answer to my own question that I found with help from the author of the below two blog write ups that I was using together to create a two switch backbone that was connected via GRE over two gig ports to service a fully meshed frame relay network (works great if you have two smaller routers with room for only two T1's each, which gives you 4 connected frame relay routers for your lab). The problem that I didn't understand was the DLCI mapping portion.
Basic router layout:
R1 <- Serial -> FRSW1 <- GRE via Gig -> FRSW2 <- Serial -> R2
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