On Mon, 18 Jun 2007 21:18:06 BST, Leigh Porter said: > Just out of interest, why are you looking at routing tables to find an > available subnet?
If your predecessor wasn't quite as careful documenting allocations, it can be useful to see if your paperwork says a /28 is dark, but you're in fact routing traffic for it down some customer's link. Then you get to do two things: (a) check if there's any *return* traffic and (b) call the customer and ask if *they* think it's dark or not. Hilarity ensues for some combinations of answers... (And yes, I once had a co-worker looking for a free /24, found one that was nice and empty except for smack dab in the middle, a route for a /28 that for no apparent reason pointed at an unused but registered static IP of mine in the middle of our modem pool space. After some digging, we remembered that it was a work-around for when I had 2 IBM RTs at home, that did SLIP and static addresses, but not NAT or DHCP, so my home net had some routing workarounds that never got taken down when I replaced the 2 RTs with one box that was happy to accept whatever address PPP handed it)
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