D-Link DIR-822 Quick Installation Manual page 42

DIR-822 Quick Installation Guide
4. IPv4 address assignment. By default, the built-in DHCP server of
the router assigns IPv4 addresses to the devices of the LAN. If you want
to manually assign IPv4 addresses, disable the DHCP server (click the
IPv4 tab and select the Disable value from the Mode of dynamic IP
address assignment drop-down list in the Dynamic IP Addresses
section).
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