D-Link AX1500 Product Overview page 36

Section 3 - Configuration
Secondary DNS Server
Enter the secondary DNS server IP address assigned by your
ISP.
MTU
Maximum Transmission Unit (1280~1500)- you may need to
change the MTU for optimal performance with your ISP. The
default is 1500.
MAC Address Clone
The default MAC address is set to the Internet port's physical
interface MAC address on the router. You can replace the
Internet port's MAC address with the MAC address of a
connected client.
Advanced Settings... - Static IP
Address Mode
Displays your chosen address mode.
IP Address
Enter the IP address provided by your ISP.
Service Name
Enter the ISP service name (optional)
Primary DNS Server
Enter the primary DNS server IP address assigned by your ISP.
Secondary DNS Server
Enter the secondary DNS server IP address assigned by your
ISP.
MTU Maximum Transmission Unit (1280~1492)- you may need to
change the MTU for optimal performance with your ISP. The
default is 1492.
MAC Address Clone The default MAC address is set to the Internet port's physical
interface MAC address on the router. You can replace the
Internet port's MAC address with the MAC address of a
connected client.
Enable this option to use public DNS with encryption via DNS-
Secure DNS
over-HTTPS (DoH).
DNS over HTTP Provider
Select the DNS-over-HTTPS (DoH) service provider: Google
or Cloudflare.
Allow Fall-back Use your primary or secondary DNS server as an alternative if
the configured provider is not working.
D-Link R15 User Manual 31