We no longer support this browser. For an optimal experience, we recommend updating your browser.

Close
Set location by ZIP Code

Look up a ZIP code (USPS)

Enter a valid 5‐digit ZIP code

LAN settings

The LAN settings on your CenturyLink modem will allow you to customize DHCP settings and reservations, and LAN subnets.

Note:  Your modem settings may appear slightly different from the images below, but the steps will be the same.

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! CenturyLink 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.

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

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

The DHCP reservation setup assigns a permanent IP address from your DHCP to a device on your network. 

If you are having trouble connecting new devices to your modem, you can disable DHCP reservations and remove all devices from the reservation list.

Select DHCP Reservation 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 Reservations Step 5

Follow the steps to enable DHCP reservations.

  • Step 1:  Enable the DHCP reservation state.

  • Step 2:  Enable/Disable automatic reservations upon allocation of IP addresses.

  • Step 3:  Enter the beginning and ending IP for the DHCP reservation address pool.

  • Step 4:  Select or manually enter the MAC address of the device(s).

  • Step 5:  Set the IP address to be associated with the chosen device (MAC). 

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

Follow these steps to disable DHCP reservations:

  • Step 1:  Disable the DHCP reservation state.
  • Step 2:  Remove all devices from the list at the bottom.
  • Step 3:  Click "Apply" to save your changes.

Your broadband router can support multiple LAN subnet settings. Please visit the DHCP settings page to see how to configure the default IPv4 subnet.

From the Advanced Setup menu, select LAN Subnets in the left sidebar.

LAN Subnets Step 5

Follow the steps to edit the LAN Subnets settings.

  • Step 1:  Enter the LAN Subnet Name.

  • Step 2:  Set the interface(s) associated with the subnet (Ethernet; SSID; LAN/WAN).

  • Step 3:  Enable/Disable the IPv4 Addressing State.

  • Step 4:  Set the IPv6 LAN Connection Type. You can also edit or remove items from the Subnet List at the bottom.

  • Step 5:  When you're finished adding or removing items, click "Apply" to save your changes.
LAN Subnets Step 6

Top Tools

Support topics