Above is a closer look at my Frame Relay topology. Mr. John Bartram requested a closer look at my frame relay setup so I designed this map in Visio.
As you can see, the Frame Relay switch (the DCE - usually provided by Service Providers) provides the PVCs (Permanent Virtual Circuits) between each site location. HQ(DTE) uses DLCI 16 to communicate to send traffic to Branch Office 1(DTE). The Frame Relay switch then routes the traffic to DLCI 17 to complete the transmission to Branch Office 1 and vice-versa. The same also occurs between HQ and Branch Office 2(DTE) with DLCIs 18 and 19.
At Layer 3, all routers are able to communicate via the EIGRP routing protocol. This setup is a relatively simple hub-and-spoke Frame Relay network. It's pretty easy to setup. Once I acquire more routers, I would like to experiment with Full Mesh (fully redundant interconnected) Frame Relay designs. In this design, if the HQ router fails, that entire WAN goes down from my understanding.
All connections were made using Cisco WIC-2Ts and Smart Serial (DCE/DTE) Cables.
