frame relay

One of the most effective lab setups uses frame relay as its primary transport method. This is a configuration that many people use and praise for its ease of setup and maintenance. Topologies can be changed quickly and easily without touching a single cable. To accomplish this we configure a Cisco router as a dedicated Frame Relay switch that will act as a DCE device on the line. Frames from a Frame Relay PVC arriving on an incoming interface are switched to a Frame Relay PVC on the designated outgoing interface. The switching is performed completely in Layer 2, and the switch pays no attention to the Layer 3 information contained within the frames.
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