ery similarly to the smaller 3550 and 3750 switches, but with more flexibility and power. Figure 17-1 shows how a typical multitiered e-commerce web site can benefit from using a 6509 chassis-based solution rather than a series of individual components. Internet Internet PIX firewalls (2) FWSM (2) Trunk 3750 switches (2) Trunk 6509 switches (2) 48-port modules (4) Trunk Content switches (2) Trunk CSM-2 (2) Trunk 3750 switches (2) Trunk Web servers (25) Trunk 3750 switches (4) Trunk App servers (10) Trunk 3750 switches (2) Trunk Individual network 6509 integrated network components components Figure 17-1. Individual versus integrated network components First, because all of the layers can be consolidated into a single device using VLANs, many of the switches are no longer needed, and are replaced with Ethernet modules in the 6509 chassis. Second, because some layers do not need a lot of ports, a better utilization of ports can be realized. A module is not dedicated to a specific layer, but can be divided in any way needed. If we allocated a physical switch to each layer, there would be many unused ports on each switch, especially at the upper layers. Another benefit is that because the components are included in a single chassis, there are fewer maintenance contracts to manage (though modules like the FWSM and CSM require their own contracts). Additionally, because all of the devices are now centralized, there only needs to be one pair of power outlets for each switch. The tradeoff here is that the power will no doubt be 220V 20A, or more. Cisco 6500 Multilayer Switches Some of the new power supplies for the 6500e chassis require multi- ple power feeds per supply. The 6000-watt AC power supply requires two power outlets per supply. The 8700-watt AC power supply requires three outlets per supply, resulting in a total of six outlets per chassis! The main advantages are supportability and speed. Each of the modules is available through the switch itself in addition to its own accessibility, and in the case of the CSM