Here’s some things you may want to do to make sure you don’t leave yourself hanging in the breeze when things go SNAFU.
Before I make any changes I always save a copy of the running config to flash. In case you accidently delete the config, it gets blown away, whatever. I prefer to keep it on flash for quick restoration as well as viewing encrypted keys in plain text.
Routers & Switches
copy running-config flash:LastKnownGood
PIX & ASA
copy running-config flash:
Source filename [running-config]?
Destination filename [running-config]? LastKnownGood
%Warning:There is a file already existing with this name
Do you want to over write? [confirm]
Hopefully you already know this one. You can have the router reload at a specific time or in X hours/minutes. This is very useful when you’re ready to make a change and you’re not 100% you’ll break something or get locked out (like configuring AAA).
Reload the router in 5 minutes
reload in 5
Reload the router at 11:00PM
reload at 23:00
Cancel the reload
That’s all I can remember now, but check back and I’ll add more as I work on stuff.