Operation Manual – OverviewH3C S7500 Series Ethernet Switches Chapter 4 Networking Applications4-24.2 Application in a Small/Medium-Sized Enterprise NetworkTypically, an S7500 series switch can be used at the backbone layer in asmall/medium-sized enterprise network. The switch is connected to its neighboringdevices as follows: In the downstream direction, the switch is connected to the Layer2/3 Ethernet switches (for example, H3C S3100/S3600 series switches) of workgroupsor directly connected to user's workstations through GE/FE optical or electrical ports; itis connected to other floors/buildings through GE optical ports (long- or short-haul) ormulti-GE Trunks; and it is connected to server groups through GE/FE electrical ports. Inthe upstream direction, it is connected to a router through a 10/100 Mbps electrical port.Figure 4-2 Application in a small/medium-sized enterprise network4.3 Application in a Large-Sized Campus NetworkTypically, an S7500 series can be used at the aggregation or backbone layer in alarge-sized campus network. In this case, it is often deployed in cabling room or centeroffice. In the downstream direction, the switch is connected to theworkgroup/campus-level Layer 2/3 Ethernet switches (H3C S3100/S3600 seriesswitches) through GE/FE optical or electrical ports. In the upstream direction, it isconnected to a backbone Ethernet switch or a router through a GE optical/electricalport.