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In task 3, we need to upgrade the router operating system to this version of operating system.

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So copy that, 

3
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we need to leave the current operating system in the flash of the router, so show Flash shows us the

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current operating system in Flash

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but we want to upgrade the router

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to 15.5-3, at the moment show version shows us that this is the operating system that

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was loaded from Flash.

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This is the version being used

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but we want to go to 15.5-3. So copy TFTP flash before I do that again, DIR of the

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Flash shows us that there's only one file in flash.

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So copy TFTP flash, 

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IP address of the TFTP server is that the file that we want to copy is that we're going to leave it

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with the same name and notice it's copied to the flash of the router.

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So DIR flash shows us that we now have two files in flash.

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Now, to ensure that the router boots using the new operating system, we have to go into global

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configuration mode and type, boot system flash

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and specify the operating system to boot from Flash.

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So now in the running configuration of the router, we've added this command.

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We have to save the running configuration so that when the router reloads, it reloads and boots using

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the new operating system.

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So the router has now rebooted, show version notice a different operating system has been booted from Flash.

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The version now being used is 15.5-3 M4A, so we've proven that the router is now using

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a different operating system.

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We have successfully completed these tasks.

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Were you able to complete the tasks?

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They were quite a few to do here

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but hopefully, after doing this, you understand how to back up and restore device configurations and

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operating systems.