Setting up a DHCP server

Last Updated : Apr 17, 2026 |
Prolog information
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Use this procedure to set up a third-party DHCP server.
PREREQUISITE
Contact your server software vendor to obtain server software installation and configuration instructions.
  1. Install the DHCP server software according to the software vendor’s instructions.
  2. Create a DHCP scope to define the range of IP addresses for the phones.
  3. Configure the required DHCP options.
    ADDITIONAL INFORMATION:
    The DHCP site-specific option that you configure must match the Site Specific Option Number (SSON) that the phones use. The default SSON that the phones use is 242.
Related information
DHCP server configuration