Cisco IOS Commands - 3 Essential Commands You Need As a CCNA Network Engineer

Cisco IOS commands are the bread and butter of any network engineer. As a budding CCNA, you have to master IOS commands in order to become effective at your job. If you're not yet certified, mastery of IOS commands is an essential part of studying for and passing the CCNA test. However, not all IOS commands are equally important. The most important commands are usually those relating to common networking deployment and troubleshooting tasks. Here are 3 of the most essential commands you will need to become CCNA certified and to do well as a certified networks engineer:
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Cisco IOS Command 1 - show ip route. The show ip route command is the most commonly used command when you want to troubleshoot routing issues. The command returns a listing of the router forwarding table which is used to forward packet. If you are having or are suspecting a routing issue, the show ip route command is extremely useful to determine if there are any routing problems.

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Cisco IOS Command 2 - show interface. The show interface command is used to display the status of any interface in the switch or router. There is a great amount of detail shown in the show ip interface command and you will be able to display details such as whether the interface is up or down, and whether there are any CRC errors and collisions on an interface. The information provided can help you narrow down the specific issue you are experiencing on the interface.

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Cisco IOS Command 3 - Extended Ping. The extended ping feature of Cisco IOS can be accessed only if you are privileged mode. Using the extended ping options of the ping Cisco IOS command, you'll be able to generate ICMP packets with different ranges of sizes. Another extremely useful feature is to be able to control which interface or IP address the ping is sourced from. This can help to further isolate the network issue and help you get a step closer to resolving the problem.

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These 3 commands are only a small portion of the most essential Cisco IOS commands you need in order to pass the CCNA exam as well as be effective in your job as a CCNA network engineer.
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