QNAP Security VioStor NVR (Version: 4.1.2) - Manual (Page 145)

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Network Transfer Rate
Select auto-negotiation (default), 1000 Mbps, or 100 Mbps. It is recommended to use the
default setting that the server will determine the network speed automatically.
Obtain IP address settings automatically via DHCP
If the network supports DHCP, select this option to allow the NVR to retrieve an IP address
and the related information automatically.
Use static IP address
To assign a fixed IP to the NVR, enter the IP address, subnet mask, and default gateway.
Primary DNS Server
Enter the IP address of the primary DNS server that provides the DNS service for the NVR
on the external network.
Secondary DNS Server
Enter the IP address of the secondary DNS server that provides the DNS service for the NVR
on the external network.
Enable DHCP Server
If no DHCP server is available on the LAN where the NVR locates, enable the NVR as a DHCP
server to allocate dynamic IP address to the DHCP clients on the LAN.
Set a range of IP addresses allocated by the DHCP server and the lease time. The lease
time refers to the time that the IP address is leased to the clients by the DHCP server.
When the time expires, the client has to acquire an IP address again.
Note: If there is an existing DHCP server on the LAN, do not enable this function to avoid
IP address allocation failure and network access error.