PDF user manual for CopperEdge 150

&RSSHU9311HWPRGHOWith this netmodel, either in static forwarding mode or autolearning mode, subscriber links act as wide-area extensions ofa DSL remote LAN. Unlike the VWAN netmodel, CopperVPNdoes not rely on the upstream device for integration of routingand bridging functions. The CE150 learns the IP and MAC addressand port number for every host supported by the CPEs.CopperVPN is a layer 3 LAN extension to an upstream router. Itsimplifies the connection of DSL lines between end users and aremote LAN or other corporate network. With it, you can combinea number of DSL ports into a group within the CE150. You cansend the data over a single virtual circuit across the network toa single destination, typically a router at an ISP or a Corporatesite. Each CopperVPN PVC thus comprises a Virtual Private Networkof DSL subscribers without the need for any special routercapabilities such as IRB or compatible IOS versions.For each CopperVPN group, the CE150 has a separate ARP table,which it uses to perform the IP-to-MAC address translation.Incoming IP PDUs from the upstream router are properlydelivered to their intended DSLs and nowhere else. On the DSLLAN, the CE150 acts as a proxy for the upstream router, andreplies to ARP requests from devices connected to the variousDSL ports. Then, when the host on the DSL LAN responds withupstream transmission of MAC PDUs, the CE150 simply forwardsthem to the appropriate upstream router in IP PDU format.The CE150 obtains knowledge of the address of theupstream router in one of two ways: either from the static configuration(entry of the WAN PVC’s cmIface FarEndAddr object),or from an inverse ARP request to the remote upstream device.Palo AltoWiring ClosetWANDSLRemoteLANs!!!CopperVPN 1with ARP TableCopperVPN 2with ARP TableCopperVPN nwith ARP TablePVC 1Frame RelayNetworkPVC 2Santa ClaraUpstream RouterSan FranciscoUpstream RouterCorporateLANPublicInternetPVC nCopperVPN Network Model&KDSWHU$GYDQFHG&RQILJXUDWLRQ