Ok, maybe it’s not that extreme, but losing power to a Cisco router or switch, while performing an IOS upgrade, after you’ve deleted your existing IOS can be a headache.  While not a disaster, you can plan on spending about an extra 45 minutes or so to recover.  Here’s the lowdown:

Summary

You’ll need to upload a new IOS image using the Xmodem or Ymodem protocol, which is way slower than More >