Viewing, Saving, and Erasing Configurations
If you run through setup mode, you’ll be asked if you want to use the configuration you just created. If you say yes, then it will copy the configuration running in DRAM (known as the running-config) into NVRAM and name the file startup-config. Hopefully, you will always use the CLI and not setup mode.
You can manually save the file from DRAM (usually just called RAM) to NVRAM by using the copy running-config startup-config command (you can use the shortcut copy run start also):
Todd#copy running-config startup-config
Destination filename [startup-config]? [press enter]
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