How many times do you type show ip interface brief, copy run start, configure terminal, show running-config, etc. But isn’t there a way to make thing easier? Yes there is, that’s command aliases feature provided in Cisco IOS.
Aliases are configured within a mode; exec: #, global configuration: (config)#, interface configuration: (config-if)#, router configuration: (config-router)#, etc. [...]

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You might have experienced that while you are typing a command on a terminal, some stuff get thrown to the terminal by the router or the switch making it a mess. This stuff can be useful specially when you are configuring a routing protocol or changing setting on an interface. However messages like the following, [...]

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This article discusses how you can disable DNS lookup on Cisco routers and switches and effect when DNS lookup is enabled.
Problem: In privilege EXEC mode, if you type in something other than a Cisco IOS command, the router assumes that you typed a domain name and it tries to resolve what ever you type.
Although this [...]

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