Serial port configuration task list 182IPLink Software Configuration Guide 15 • Serial port configurationPVC Configuration:Port DLCI State Fragment Encaps Binding--------------------------------------------------------------serial 0 0 0 1 open disabled rfc1490 wan@routerFigure 30. Typical Integrated Service Access Scenario with dedicated PVCsIntegrated service accessThe example in figure 30 shows a typical integrated service access scenario, where different service providers areaccessed via permanent virtual circuits (PVCs) on Frame Relay over the serial interface of an IPLink.The multi service provider (MSP) offers both Internet access and voice services based on IP. The virtual privatenetwork (VPN) provider offers secure interconnections of local access networks (LAN) via its public wide areanetwork based on IP. Since both providers are working independently, the IPLink needs a configuration, whichhas two dedicated PVCs on Frame Relay. The first PVC, labeled as PVC 1, connects to the MSP access device.The second PVC, labeled PVC 2, connects to the VPN provider access device on the leased line network.An IPLink is working as a DTE and accesses the leased line network via a leased line modem connected to theserial interface. The hardware port protocol X.21 is used on the serial interface on slot 0 and port 0.Devices accessing the MSP and VPN services are attached to the 100 Mbps Ethernet port 0/0 on the IPLink.For that reason, an IP context with three logical IP interfaces bound to Ethernet port 0/0, PVC 1 and PVC 2on serial port 0/0 as shown in figure 30 has to be configured for the IPLink. The IP interfaces are labeled torepresent the function of their configuration. Hence Ethernet port 0/0 is named lan, PVC 1 is named externalsince external services are accessed via this PVC, and PVC 2 is named internal to indicate the private networkinterconnection via this PVC.Node2300IPLink Leased LineNetworkMultiServiceProviderMultiServiceProviderVPNProviderVPNProviderModemModemInternetPSTNGWGWX.21PVC 1PVC 2
