44 CHAPTER 7: SWITCH FABRIC M ANAGEMENT MODULES AND I NTERFACE M ODULESSwitch FabricManagement ModuleOverviewThe Switch 4005 is required to have one Switch Fabric Management Module(SFMM) installed in slot M1 or M2. These slots can only house this type of module.CAUTION: All standard chassis and starter kit chassis leave the manufacturingcenter with one SFMM preinstalled in slot M1 or M2. The other M slot will becovered with a blank faceplate and you must leave it in place until you are ready toinstall a redundant SFMM.The SFMM performs two critical functions in the chassis: (1) the central switchfabric and (2) the management entity.Switch Fabric Functions The Switch Fabric Management Module includes a switch fabric that serves as thecentral backplane aggregator for the chassis. That is, if an interface modulereceives a packet that is not destined for one of its local ports, it forwards it to theSFMM for processing. The SFMM routes the packet to the correct interfacemodule in the chassis.The system software resides on the SFMM. Software is preinstalled on the SFMMat the manufacturing center so that the Switch is ready to operate in your networkafter you physically install it. For information about the default settings on thesoftware features or how to modify them see the Switch 4005 SoftwareConfiguration Guide.Management Functions The Switch Fabric Management Module exchanges information with all modulesthrough the management bus. The module uses the management bus to sendcommands to interface modules and to collect information from interfacemodules.The Switch 4005 software includes a Web management interface and amenu-based command line interface. You can access the Web managementinterface through any Ethernet port from your PC using a Web browser. You canaccess the command-line interface through the RS-232 console port on the SFMMby using terminal emulation software (such as HyperTerminal for Windows®), orremotely through any Ethernet port on the Switch from your PC by using a Telnetutility.The SFMM also allows you to configure and monitor the Switch 4005 chassisusing SNMP-based management software from a remote workstation. Twoexamples of such software include Hewlett-Packard’s HP Openview® and 3ComNetwork Supervisor.You can download 3Com Network Supervisor from the 3Com Web site.For more information about management access, see the Switch 4005 SoftwareConfiguration Guide.CAUTION: Do not install or remove any modules during the system power-onprocess or while software is downloading to the Switch Fabric ManagementModule.