Out on a call for a router gone South.
Consoled in and everything looks cool, but the customer's IT "genius" says it's defective.
So I call Cisco Level 3 support and they WebX through my laptop. The Cisco dude can't find anything wrong either.
Then the IT genius says something like the server software (which handles the DHCP address pool) was upgraded right before the router failed.
From the sound of it, whatever the Level 3 guy was drinking when the IT guy mentioned the "upgrade", got sprayed all over his monitor and keyboard.