Dahua NVR21-4KS3 Series User Manual page 356

Procedure
Select Main Menu > NETWORK > Wi-Fi AP > Advanced.
Step 1
Step 2 Configure parameters.
Parameter
IP Address
Subnet Mask
Default Gateway
Start IP
End IP
Preferred DNS
Alternate DNS
Step 3 Click Apply.
Figure 5-224 Advanced settings
Table 5-62 Parameters of advanced settings
Description
Set IP address, subnet mask and default gateway for the Wi-Fi of NVR.
IP address and default gateway must be on the same network
segment.
Set the start IP address and end IP address of the DHCP server.
Set preferred and alternate DNS server address.
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User's Manual