Operation Manual – OverviewH3C S7500 Series Ethernet Switches Chapter 3 Product Overview3-1Chapter 3 Product Overview3.1 IntroductionH3C S7500 Series Ethernet Switches (hereinafter referred to as the S7500 series) area series of wire-speed Layer 2/3 Ethernet switching products with modular architectureand high-capacity. Among this series, S7503, S7506 and S7506R are oriented to theaggregation layer of IP metropolitan area networks (MANs) and the core layer of small-and medium-sized enterprise networks and campus networks; and S7502 is oriented tothe aggregation and access layers of IP MANs and the core layer of small- andmedium-sized networks. The S7500 series provide powerful switching capability andincrease network availability; they have good scalability, high performance andpowerful network control ability.3.2 Available Switch ModelsTable 3-1 lists the available models of the S7500 series.Table 3-1 Available models of the S7500 seriesSwitchModelPowersupplyTotalslots Switching engines Service cardsS7502 2 Single switching engine, in slot0 One, in slot 1S7503 4 Single switching engine, in slot0Three, in slot 1 to3S7506 7 Single switching engine, in slot0 Six, in slot 1 to 6S7506RAC/DCredundant powersupplies8 Dual redundant switchingengines, in slot 0 and 1 Six, in slot 2 to 73.3 Switching EnginesSwitching engines are the cores of the S7500 series. The switching engines you canselect depend on the switch model you select. Table 3-2 and Table 3-3 list the switchingengines available to different S7500 switch models.