Our network is currently set to use one DHCP range (we don't do internal
DNS - it's handled by our ISP) with as our internal gateway -
a Bordermanager server which also is our DHCP server.

The problem is we're running out of static ip addresses internally so we
want to add another subnet.

What do we need to do to have, say, a 10.x.x.x range talk with the rest of
our network? Thank you.