Operation Manual – OverviewH3C S7500 Series Ethernet Switches Chapter 4 Networking Applications4-1Chapter 4 Networking ApplicationsThe high-capacity, Layer 2/3 S7500 Series Ethernet Switches are mainly designed forIP MANs, large-sized enterprise networks and campus networks. They can serve asaggregation switches to play important role in MANs, or serve as core switches inenterprise or campus networks. This series, together with the H3CS3100/S3600/S5600/S9500 series and Huawei's MA5200 Ethernet accessmanagement system, allows for comprehensive solutions for MAN and enterprisenetworking.The following sections describe several typical networking applications of the S7500series.4.1 Application in a MANTypically, an S7500 series switch can be used at the aggregation layer in a MAN. Inupstream direction, the switch is connected to a Layer 3 switch (for example, a H3CS9500 series routing switch) or a GSR (Gigabit switching router) in the backbonenetwork through a GE link across long/ultra-long haul dark fiber cable (you can also usemulti-GE Trunk to increase upstream bandwidth). In downstream direction, the switch isconnected to the egress Layer 2/3 Ethernet switches (for example, H3CS3100/3600/S7500 series switches) in LANs through GE ports across long/ultra-longhaul dark fiber cables (you can also use multi-GE Trunk to increase downstreambandwidth).Figure 4-1 Application in a MAN
