路由器交换机基础知识及基本配置.ppt

* Router status commands are as follows: show version—Displays the configuration of the system hardware, the software version, the names and sources of configuration files, and the boot images. show processes—Displays information about the active processes. show protocols—Displays the configured protocols. This command shows the status of any configured Layer 3 (network) protocol. show mem—Shows statistics about the router’s memory, including memory free pool statistics. show stacks—Monitors the stack use of processes and interrupt routines and displays the reason for the last system reboot. show buffers—Provides statistics for the buffer pools on the network server. show flash—Shows information about the Flash memory device. show running-config (write term on Cisco IOS Release 10.3 or earlier)—Displays the active configuration file. show startup-config (show config on Cisco IOS Release 10.3 or earlier)—Displays the backup configuration file. show interfaces—Displays statistics for all interfaces configured on the router. * Purpose: Provide the configuration commands for managing session timeouts. Emphasize: Be careful of setting timeouts too low, as it will make it difficult to stay logged in to the network device. Transition: The following is a discussion of modifying privilege levels to provide for a more granular set of rights to the Cisco IOS. * Purpose: Discuss the commands used to modify the privilege levels for users. Emphasize: Privilege levels are helpful when there are users who need to have access to certain commands for troubleshooting but should not have full admin access. Not all Cisco IOS devices can have privilege levels set. The 1900/2800s do not currently support this feature. This is used for devices, such as routers, that may need to have more frequent access or might be managed by an outside company like routers. Transition: Another management component is the message that is displayed as the user logs in to the network device. * Slide 1 o