ccna under

ccna under.IDS in ActionAfter you configure an IOS device, there are many commands that you can use to view the configuration and troubleshoot problems. This section describes some basic show commands, and the next few chapters discuss other commands that can help troubleshoot tricky problems.10.6.1 CommandsOverview of show and debugOn IOS devices, two basic commands can be used to troubleshoot.. show: takes a snapshot of a specific process and displays information about it. The information displayed is static and will not refresh unless you run the command again (you can use the command line history feature to do this).. debug: continuously displays the current status of a particular process, displaying information in real time. The show command consumes very few IOS device processing cycles, allowing you to quickly see what the configuration is (e.g., in-memory configuration, routingconfiguration of the selection protocol or STP) or the current state of the process (such as the state of the interface, routing table, or port address table). o Unfortunately, the show command sometimes does not provide enough information to enable you to properly diagnose and fix problems.The debug command constantly displays the operation and behavior of the process, such as the contents of routing updates received by neighboring routers, and can often provide greater assistance in troubleshooting tricky problems. The main disadvantage of the debug command is that it consumes a significant number of processing cycles of the IOS device and should therefore be used with caution.10.6.2 Running Configuration and Startup Configuration