Changing subnet from /24 to /16
Just need to check my logic on this one...
I've got two networks at the moment... admin on a standard Class C /24 which is fine for what it is at present, then a teaching network which bizarrely has a class A subnetted as a C (no idea why)
Problem being we've hit 200 odd teaching workstations, 20 odd printers, wireless going in and laptops going onto the network so 254 hosts is going to run out of room very soon. In the long-term I want to merge both networks together and use a bunch of /24 VLANs routed via our 5406zl. That won't happen just yet due to some other issues so need to do enough to keep the teaching network going for a while longer.
So to keep amount of reconfiguration as low as possible I'm thinking of changing the mask to 10.0.0.0/16 so I get 65534 host addresses. In theory as well I should be able to leave servers etc with IP addresses as they are (10.0.88.x) and just change the subnet over to /16. Then just make a new DHCP scope anywhere within that range (need to migrate the role to a 2008 R2 VM anyway).
Seems like changing subnet doesn't affect DCs etc as much as shifting IP addresses so apart from the manual re-config of printers etc shouldn't be too painful. Input and experiences welcomed :)