Run privileged commands in global config mode

Beginning with the IOS version 12.3, privileged-exec mode commands (such as show running-configuration, show interface status, etc.) can be executed within the global configuration mode and its submodes. This allows you to execute privileged-exec mode commands without needing to exit the current configuration mode. Here is an example that explains the usefulness of this feature:

ios command not found

In the example above you can see that we’re currently in the interface mode. We want to get more information about the interface with the show interface Fa0/1 command, but we got an error because the command is not available in this mode. However, if we use the do keyword in front of the command, the command will succeed:

do command

The command was now found and executed because of the do keyword. Notice that we’re still in the interface submode and we can continue with the interface configuration.

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Geek University 2019