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Because the high processor overhead of debug commands can disrupt router operation, you should use them only when you are looking for specific types of traffic or problems, and have narrowed your problems to a likely subset of causes.
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Use debug commands to isolate problems, not to monitor normal network operation. When you finish using a debug command, remember to disable it with its specific no debug command (or use the no debug all command to turn off all debugging). Many debug commands are processor-intensive and can cause serious network problems (such as degraded performance or loss of connectivity) if they are enabled on an already heavily loaded router. The # prompt (instead of the normal > prompt) indicates that you are in the privileged exec mode (enable mode).Ĭaution Exercise care when using debug commands. Note the change in the router prompts here. To access and list the privileged exec commands, enter this code: The debug privileged exec commands can provide a wealth of information about the traffic being seen (or not seen) on an interface, error messages generated by nodes on the network, protocol-specific diagnostic packets, and other useful troubleshooting data. For details on using and interpreting the output of specific show commands, refer to the Cisco Internetwork Operating System (IOS) command references. Hundreds of other show commands are available. This will be explained further in the "Using debug commands" section. Like the debug commands, some of the show commands listed previously are accessible only at the router's privileged exec mode (enable mode). You can always use the ? at command line for a list of subcommands.
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Cisco network booster software#
show version-Displays the configuration of the system hardware, the software version, the names and sources of configuration files, and the boot images.The following are some of the most commonly used show commands: Determine the status of servers, clients, or other neighbors.Isolate problem interfaces, nodes, media, or applications.Monitor router behavior during initial installation.You can use the show commands to perform a variety of functions: The show commands are powerful monitoring and troubleshooting tools. The trace commands provide a method of determining the route by which packets reach their destination from one device to another.The ping commands help determine connectivity between devices on your network.The debug commands assist in the isolation of protocol and configuration problems.The show commands help monitor installation behavior and normal network behavior, as well as isolate problem areas.The following sections describe the basic use of these commands: This includes information on using router diagnostic commands, Cisco network management tools, and third-party troubleshooting tools.Ĭisco routers provide numerous integrated commands to assist you in monitoring and troubleshooting your internetwork. This chapter presents information about the wide variety of tools available to assist you in troubleshooting your internetwork. Volt-Ohm Meters, Digital Multimeters, and Cable Testersīreakout Boxes, Fox Boxes, and BERTs/BLERTs The VlanDirector Switch Management Application