Gert,

...

Michel Py wrote: Most of the more experienced network managers out there will tell you this: I don't want to go through this again.

But at the same time, most of the more experienced network managers have been through it a couple of time, and will understand the necessity... :-) (We had to change the IP addresses for our recursive DNS servers 3 times by now, and making sure all customers update their configs *was* a nightmare

Renumbering DNS servers is 1% of renumbering a large enterprise setup. Imagine if you had them change not only DNS, but all of their DHCP scopes, firewall rules, host files, batches, printers, renumber their active directory controllers (ever tried to change the IP address on a windows box that assumes FSMO roles?) etc etc.

- nevertheless, it was the correct thing to do

Good for you. In my world, the correct thing to do is the one that has a positive impact on the bottom line.

Jørgen Hovland wrote: Renumbering is as easy as you want it to be.

I love guys like Jørgen. One day they'll find someone fool enough to let them touch a big network, they'll make a mess, and their management will suddenly understand the value of paying me 2k per day so another disaster does not happen. Michel.