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Switched WAN Networks and Their Impact on EIGRP Switched Unused 0 1 0 1 0 0 0 0 206 DLCI = 101, DLCI USAGE = UNUSED, PVC STATUS = ACTIVE, INTERFACE = Serial0 input pkts 14 output pkts 1 in bytes 862 out bytes 30 dropped pkts 0 in FECN pkts 0 in BECN pkts 0 out FECN pkts 0 out BECN pkts 0 in DE pkts 0 out DE pkts 0 out bcast pkts 1 out bcast bytes 30 Num Pkts Switched 0 pvc create time 00:00:59, last time pvc status changed 00:00:59 DLCI = 102, DLCI USAGE = LOCAL, PVC STATUS = DELETED, INTERFACE = Serial0 input pkts 0 output pkts 1 in bytes 0 out bytes 64 dropped pkts 0 in FECN pkts 0 in BECN pkts 0 out FECN pkts 0 out BECN pkts 0 in DE pkts 0 out DE pkts 0 out bcast pkts 1 out bcast bytes 64 pvc create time 00:01:48, last time pvc status changed 00:01:02 Subinterfaces All routers reachable through a single physical interface over a switched WAN network are usually handled in the same manner. For example, all the gas stations connected to the central MetroGas router were handled identically. However, several design scenarios where the routers reachable over a single physical interface have to be handled in entirely different ways do exist. For example, the core and access routers in DUAL-Mart network were in different subnets and running different routing protocols (see "Case Study 1 Solution--Integrating RIP and EIGRP" in Chapter 9, "Inte- grating EIGRP with Other Enterprise Routing Protocols," for more details).