DHCP – Running out of IP

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    We’ve 3 class C segment being used for production;
    Subnet A:
    Subnet B: (isolated, no internet access)
    Subnet C: (Office LAN, Office Automation Servers)

    DHCP on Subnet C is running out of IP addresses.

    What we have in Subnet C:
    1- DC, DNS, DHCP
    2- Exchange Server
    3- File Server (DFS)
    4- Printers
    5- Client Desktop/Laptop
    6- Staging Servers Environment

    Anyone can help me to plan the migration increase the DHCP range address?

    I’ve thinking a few plan;
    1- Supernetting (Resubnet)
    2- Superscope

    as for Supernetting;
    1- Change firewall MAP/NAT
    2- Delete current DHCP scope & create with new subnet
    3- Change IP/Subnet/Gw on static address machine
    note : instead of ip) change to (512 ip)
    new range will be : – subnet

    1- how this will impact on the Domain controller?
    2- how about exchange server/service?
    3- what are other consideration?

    as for Superscope;
    1- DHCP server will require two connected NIC with different IP & subnet.
    1- Add new superscope and add additional subnet to the superscope.
    2- configure routing table to serve new subnet to access internet
    note : instead of ip) add additional to (512 ip)
    new range will be : subnet and subnet and

    1- is this really work?
    2- what are other consideration?

    This is only a theory plan. I am not sure whether this will be the correct plan.
    Please advise.

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