How to change DHCP settings on your modem

Dynamic Host Configuration Protocol (DHCP) settings allow you to set the parameters for how your modem assigns IP addresses to devices on your network.

Proceed with caution! Brightspeed recommends that you keep the default settings for the LAN IP address. Changes to this feature will reset other settings on your modem as well. Proceed only if you understand the technical impacts of this feature.


If you need to restore the default Brightspeed IP addressing values, they are:

  • DHCP Server: Enable
  • Modem IP Address:
  • Beginning DHCP Server Address:
  • Ending DHCP Server Address:
  • Subnet mask:

NOTE: This article applies to newer Brightspeed modems. Depending on your particular model, you may see slight differences in the features or layout of your modem's user interface.

5. Select "DHCP Settings" in the left sidebar.  This menu option may appear in the LAN Settings section or in the IP Addressing section, depending on your model.

DHCP Settings Step 5

6. Follow the steps to edit the DHCP settings.

  • Step 1:  Enable/Disable the DHCP server.

  • Step 2:  Enter the IP addressing values to be allocated.

  • Step 3:  Enter the DHCP server lease time.

  • Step 4:  Enable/Disable DHCP reservations.

  • Step 5:  Set the DNS type as Default or Custom.

  • Step 6:  Click "Apply" to save your changes.
DHCP Settings Step 6

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