ar due to their expandability, flexibility, and performance. For more information on switch types, refer back to Chapter 2. Cisco 6500-series switches are discussed in more detail in Chapter 17, and the 3750 is the focus of Chapter 18. Multilayer Switch Models CHAPTER 17 Cisco 6500 Multilayer Switches The Cisco 6500 is possibly the most widely deployed enterprise-class switch in the world. The balance of expandability, power, capabilities, and port density offered by this switch is hard to beat. The 6500 series comes in sizes ranging from 3 slots up to 13 slots. There are even versions that are Network Equipment Building System (NEBS) compliant for use in telecom infrastructures that must meet these stringent specifications. The 6500 architecture has been around for some time, but because it was developed with expandability in mind, the switch that originally supported only 32 Gbps on the backplane now routinely supports 720 Gbps, with 1,440 Gbps on the horizon! The versatility of the 6500 platform has been a prime driver for this series' place- ment in a wide variety of positions in an even wider array of solutions. 6509 switches are often seen at the center of enterprise networks, at the access layer of large compa- nies, as the core of e-commerce web sites, and even as the telecom gateways for large VoIP implementations. Likewise, the flexibility of the 6500 platform has made it prevalent even in smaller companies. The 6500 series includes Firewall Services Modules (FWSMs), Content Switching Modules (CSMs), and Network Analysis Modules (NAMs). The entire network infrastructure, as well as all security, load-balancing, and monitoring hard- ware, can be contained in a single chassis. With the addition of a multilayer-switch feature card (MSFC), the 6500 becomes a multilayer switch. With the addition of IOS running natively, the 6500 becomes a router with the potential for more than 300 Ethernet interfaces, while retaining the functionality and speed of a switch. When running in native IOS mode, a 6500 operates v