Problem, I currently am using a Sonic Wall TZ200 with a subnet of /23. I assigned ALL IP address's manually to every machine/device and ALL switches or unmanaged. I am moving from the TZ200 to a XG210. My problem is I am running out of IP address's on the current subnet scheme. What I would like to do is move to a subnet scheme of /20. The main problem is I need to keep in-place the current IP scheme of /23, while I implement my new scheme of /20. How can I do this? I today's current IT world their as to be a way. PLEASE HELP.
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