If I power cycle the Cisco 2600, what information regarding the running configuration (interface configuration) do I stand to lose?
If you save the configuration before power cycling the router, then you will not lose anything at all. Use the following command in the privileged exec mode to save the running configuration on Cisco router: copy running-config startup-config. If you do not save the configuration before rebooting the router, then you will loose all the configuration information since you last saved the running config on the router (so if you have never saved the config, then the router will have no config after reboot).
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