At work we are migrating our division's IP range from one block to another this autumn. It's a mamoth task, as many devices have hardcoded IPs and will need to be updated manually on the device.
IT don't actually know about all the devices (mostly printers) that we have and need to get a list of every device using an IP address, and some idea of what it is.
Apparently the re-IP project has zero budget, so all our switches and routers come off-line, are manually re-configured one at a time, and then all the systems are brought up manually one at a time with new IP addresses. We don't have the luxury of running the old and new networks side-by-side.
IT want to spend £10k to buy some windows network tool that will find and identify all the devices on the network. I showed one of the chaps nmap, and it scanned a block of IPs in a few seconds for nothing, and came back with quite nice results. If they want to spend £10k, we could do with some new 1Gbit switches rather than some pieces of worthless Window$ software.
Officially we were told that "NO OPEN SOURCE SOFTWARE COULD BE USED". I said we'd better switch of SAP then, as it running on top of AIX and Linux and there is a sizeable amount of open source software in both of them. To which they replied that bought open-source software is okay, but free open-source isn't...