H3C MSR 20/30/50 Series Routers User Manual Chapter 2 Feature DescriptionChapter 2 Feature Description2.1 OverviewH3C MSR Series Routers can be divided into three series: MSR 20, MSR 30 and MSR50, which are positioned in ascending order. MSR 20 and MSR 30 series can be usedas the edge access equipment of large networks or carrier networks, and the core ofbranches or small businesses; MSR 50 series can be used as the core of large andmedium-sized enterprise networks as well as the edge/aggregation access equipmentof large networks or carrier networks.2.2 Functional Modules Index of BasicTable 2-1 Functional modules index of standardFunctionalmodule FeatureATM andDSLinterfacePOS Interface EthernetInterface WAN InterfaceATM DCC DLSw Frame RelayGVRP HDLC LAPB and X.25 LinkAggregationMODEM Port Mirroring PPP(PPP,PPPoE) BridgingISDN MSTP VLAN Port IsolationAccessVolumeDynamicrouterbackupLogical interfaceARP DHCP(Server,Client) DNS IP AccountingIPAddressing IP Performance IP UnicastPolicy-Routing URPFIP ServicesVolumeFastForwarding IPv6 Basics Dual StackIP RoutingOverview BGP OSPF RIPIP RoutingVolume RoutingPolicy Static Routing IPv6 StaticRouting2-1