PDF user manual for CopperEdge 150

3UR[\$53For DSL interfaces that are routed over the 10/100BASE-TEthernet interface, the CE150 supports proxy ARP functionality.The feature simplifies configuration by allowing the CE150,when queried, to use its own Ethernet (MAC) address as a proxyfor LAN destinations on its connected CPE.Proxy ARP for Ethernet is actually the reverse of ARP used inthe CopperVPN networking model and described in Chapter 4.In CopperVPN, the CE150 replies to queries from CPEs on LANsas a proxy for the upstream router. In Proxy ARP for Ethernet,the CE150 responds to queries from the upstream device as aproxy for CPEs on LANs.The diagram below illustrates Proxy ARP for Ethernet. ButProxy ARP is valid only if the DSL port is configured with Net-Model=IP and also if the network or WAN connection is throughthe 10/100BASE-T Ethernet interface on the primary SystemControl Module. For details on configuring DSL ports for ProxyARP, see the cmProxyARPTable in the CopperEdge 150 Copper-Craft Reference and MIB Definitions manual.Subscriber LANWiring Closet192.168.1.1CE150ARP broadcast from Router:"Where is 192.168.1.1?"192.168.1.2CPE192.168.1.0PII=1.3.1.0IPAddr=192.168.99.100:80:50:70:0d:5cEthernetUpstreamRouterProxy reply from CE200:"192.168.1.1 is at 00:80:50:70:0d:5c"192.168.1.3CE150 Proxy ARP&KDSWHU5RXWLQJ)RUZDUGLQJ0DQDJLQJ/LQNV