Sim-Ex™ Lab Simulator for Network+ : Lab Exercises

Configuring Loopback Interface

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Description: The purpose of this exercise is to configure a loop back interface and test it for connectivity. The loopback interface is a logical interface internal to a router. It is not connected to any other device. A loopback interface is UP as long as the router is up and running. It is useful in managing a router as there will always be at least one interface available on the router, irrespective of other physical interfaces.

The command used for assigning loopback interface is:

Router(config)#interface loopback <number>

The number can be between 0 and 2147483647. A loopback interface is automatically put in "no shutdown" state when created. However, you need to assign an ip address to use a loopback interface.

Network Diagram:

Network+ Lab Sim image

Note: Please refer to the Sim-Ex™ Lab Simulator for Network+ software to try complete lab with instructions.

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