IP Addressing5-37112-A2-GB20-20 March 1998FDL Connection – Extending Subnet for FDLIn this example: DSU/CSU A is connected to the NMS on LAN A through the 10BaseT port. DSU/CSU A is connected to DSU/CSU B through the FDL. DSU/CSU B is addressed through the FDL as if it existed on LAN A. DSU/CSU A forwards all data to DSU/CSU B using Proxy ARP. A proprietary RIP is used to learn the IP addresses of the remote FDLinterfaces. It can take up to 5 minutes for the RIP protocol to exchangeaddresses once the FDL is active.FDL IPAddress:140.20.10.497-15699-01FDL IPAdress:135.18.5.4Subnet 140.20.10.0Subnet 135.18.5.0T1NetworkFDLNMS BRouterRouter7112DSU/CSUA7112DSU/CSUB135.18.5.2135.18.5.1Ethernet IPAddress:135.18.5.3140.20.10.2140.20.10.1Ethernet IPAddress:140.20.10.3LAN A LAN BNMS A
