what is the function of the no shut command when configuring router interfaces
To view the summary of the router interfaces, run the IOS command show ip interface brief from privileged mode. To open interface configuration mode, type interface interface_name from global configuration mode. To assign an IP address to an interface run the following command from interface configuration mode. You have to enter both IP address and subnet mask. To add a description to router interface, run the following command from router interface configuration mode. The configured description can be viewed in the output of the show interfaces command. To disable a router interface run shutdown. IOS command from interface configuration mode.