jneeley - 6:07 pm on Jan 6, 2011 (gmt 0)
You should have tested plans and failsafes already in place so that this stuff doesn't happen.
Like the example you mentioned before, there are times when unpredictable things happen, these things are the fire that we learn from. However, the testing and fail-over strategies provide opportunities to overcome those much faster than if nothing was in place.
Yes, IP addresses were changed as a result of IP allocation limits. Once IPv6 is in place this won't be an issue :)