Frame Relay Switching to Multiple Remote Sites

Frame Relay Switching to Multiple Remote Sites

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In Figure 15-3, R1 uses its single physical access link to send data to both R2 and R3. When you order the Frame Relay service, you tell the telco that you want to be able to send data from the Atlanta router (R1) to both Cincinnati (R2) and Boston (R3). To make it work, the telco gives you some documentation that tells you how it will program the Frame Relay switch. A shorthand version of that documentation is shown in the lower-left section of the figure. According to the provider, if R1 sends a frame with DLCI 102, the Frame Relay network forwards the frame to R2 (Cincinnati); if the provider puts 103 in the header, the Frame Relay network forwards the frame to R3 (Boston).