Solved: Will a Power Cycle fix a incorrect configuration?

ChrisHudd33513 · ‎04-15-2015

We are considering making a few modifications to our network after business hours but are a little unsure as to the possible ramifications. I'm almost certain this is accurate but I want to be 100% sure. If we find that we are creating more problems than fixing, I can simply power cycle the router/switch and it will boot with the startup config and discard the unsaved running config correct?

Is there any configuration I can't remove, so long as I don't do a copy run copy start, by doing a power cycle?

Bilal Nawaz · ‎04-16-2015

Hi Chris, you are correct, as long as you don't save the config, if you reload, the router/switch should come up with its original startup config. Normally when I'm making those worrying types of changes on a remote router/switch, I give myself X amount of time to complete the change, + or - 5-10mins i set my "reload in Y", if all goes well then just simply cancel the reload with "reload cancel"

hope this helps.

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Bilal Nawaz · ‎04-16-2015

Hi Chris, you are correct, as long as you don't save the config, if you reload, the router/switch should come up with its original startup config. Normally when I'm making those worrying types of changes on a remote router/switch, I give myself X amount of time to complete the change, + or - 5-10mins i set my "reload in Y", if all goes well then just simply cancel the reload with "reload cancel"

hope this helps.

Please rate useful posts & remember to mark any solved questions as answered. Thank you.

Joseph W. Doherty · ‎04-16-2015

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In addition to what Bilal has already posted, newer IOS version might support configure replace nvram:startup-config, assuming you haven't lost access to the device, this command saves you from the time of going through a reload.