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Troubleshooting Commands for the ICND1 and ICND2 Certification Exams

Part of the 1,001 CCNA Routing and Switching Practice Questions For Dummies Cheat Sheet

When problems arise on a Cisco device there are a number of show commands you can use to help identify what the problem is. The following is a list of popular show commands you should know for both the ICND1 and ICND2 certification exams:

Command(s) Result
Show running-config Used to display the running configuration stored in VRAM.
Show startup-config Used to display the startup configuration stored in NVRAM.
Show ip interface brief Used to show a summary of the interfaces and their status.
Show interfaces Used to display detailed information about each interface.
Show interface serial 0/0 Used to display detailed information about a specific interface.
Show ip route Displays the routing table.
Show hosts Displays the host name table.
Show controller serial0/1 Used to display whether the serial interface is a DCE or DTE device.
Show ip protocols Used to display what routing protocols are loaded.
Show cdp neighbors Used to display basic information about neighboring devices such as name, type of device, and model.
Show cdp neighbors detail Used to display detailed information about neighboring devices such as name, type of device, model, and IP address.
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1,001 CCNA Routing and Switching Practice Questions For Dummies Cheat Sheet

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