User Manual

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Below is an explanation of the fields on the TCP/IP settings screen:
IP Address: This field allows the user to enter a custom IP address.
Default Gateway: This field allows the user to enter the default gateway for the network. The default
gateway should be on the same IP subnet as the NVR’s IP. The specified length of the subnet prefix
should have the same string. For example, if the IP address is 192.168.0.25, the default gateway should
start with 192.168.0.X. The default gateway is usually the IP address of the router.
MTU: MTU stands for Maximum Transmission Unit. This field allows the user to set the MTU value of the
network adapter. The value ranges from 1280-7200 bytes. The default value is 1500 bytes. Please note
MTU modification may result in network adapter reboot and the network turning off. MTU modification
can affect the current network service. The system may pop up a dialog box to confirm setup when the
MTU value is changed. Click the OK button to confirm current value and reboot or can click the Cancel
button to terminate the current modification. Before the modification, you can check the MTU of the
gateway; the MTU of the NVR should be the same or lower than the MTU of the gateway. This way,
packets can be reduced, and the network transmission efficiency be enhanced. The following MTU
values are for reference only.
1500: Ethernet information packet maximum value and it is also the default value. It is the
typical setup when there is no PPPoE or VPN. It is the default setup of some routers, switches,
and network adapters.
1492: Recommend value for PPPoE
1468: Recommend value for DHCP.
MAC address: This field shows the NVR’s MAC address, which is unique to this device. This number is
read-only and is used to access a local area network (LAN).
Subnet Mask: This field allows the user to enter a custom subnet mask. The default subnet mask is
255.255.255.0. This number is used to determine which subnetwork the IP address belongs to.