DIR-X1530 Quick Installation Guide
If you want to manually assign the LAN IPv4 address for DIR-X1530, do not 
select the  Automatic obtainment of IPv4 address  checkbox and fill in 
the IP address, Subnet mask, DNS IP address, Hostname fields and, 
if   needed,   the  Gateway   IP   address  field.   Make   sure   that   the   assigned 
address does not coincide with the LAN IPv4 address of the router to which 
your device connects.
3. Click the NEXT button.
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