We currently have 3 class C public subnets, but that is causing
problems, and we are running out of available addresses, so we want to

move to a private class B addressing scheme for our internal systems.

In our current setup, all our servers are behind a BM 3.7 firewall. I

can handle (I hope) the switch from the BM side for NAT and 1-1 NAT,
it is our DNS setup that has me concerned. Our DNS servers are
responsible not only for our internal workstations accessing the
internet, but also to allow outside clients to hit our webservers or find our email servers. Any TID's relating to this migration, or does

anyone have any tips to make this as smooth as possible? As usual,
has been a "last minute" administrative decision, and any downtime is

"not acceptable."