Planet WDRT-1200AC User Manual page 41

 DHCP
Choose "Get Dynamically From ISP" and the router will automatically obtain IP addresses, subnet masks and
gateway addresses from your ISP.
 Static IP
If your ISP offers you static IP Internet connection type, select "Use Static IP Address" and then enter IP
address, subnet mask, primary DNS and secondary DNS information provided by your ISP in the corresponding
fields.
Figure 5-3-3 DHCP
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User Manual of WDRT-1200AC