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z Default gateway: Here you can input the default gateway. Please note system needs to check the
validity of all IPv6 addresses. The IP address and the default gateway shall be in the same IP
section. That is to say, the specified length of the subnet prefix shall have the same string.
z DHCP: It is to auto search IP. When enable DHCP function, you can not modify IP/Subnet mask
/Gateway. These values are from DHCP function. If you have not enabled DHCP function, IP/Subnet
mask/Gateway display as zero. You need to disable DHCP function to view current IP information.
Besides, when PPPoE is operating, you can not modify IP/Subnet mask /Gateway.
z TCP port: Default value is 37777. You can change if necessary.
z UDP port: Default value is 37778. You can change if necessary.
z HTTP port: Default value is 80.
z RTSP port: Default value is 554.
Important: System needs to reboot after you changed and saved any setup of the above four ports.
Please make sure the port values here do not conflict.
z Max connection: system support maximal 20 users. 0 means there is no connection limit.
z MTU: It is to set MTU value of the network adapter. The value ranges from 1280-7200 bytes. The
default setup is 1500 bytes. Please note MTU modification may result in network adapter reboot and
network becomes off. That is to say, MTU modification can affect current network service. System
may pop up dialog box for you to confirm setup when you want to change MTU setup. Click OK button
to confirm current reboot, or you can click Cancel button to terminate current modification. Before the
modification, you can check the MTU of the gateway; the MTU of the NVR shall be the same as or is
lower than the MTU of the gateway. In this way, you can reduce packets and enhance network
transmission efficiency.
The following MTU value is for reference only.
1500: Ethernet information packet max 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 router, switch or the network
adapter.
1492: Recommend value for PPPoE.
1468: Recommend value for DHCP.
Please make sure MTU port does not conflict with other ports.
z Preferred DNS server: DNS server IP address.
z Alternate DNS server: DNS server alternate address.
z Transfer mode: Here you can select the priority between fluency/video qualities.
z LAN download: System can process the downloaded data first if you enable this function. The
download speed is 1.5X or 2.0X of the normal speed.
Important
For the IP address of IPv6 version, default gateway, preferred DNS and alternate DNS, the input
value shall be 128-digit. It shall not be left in blank.
After completing all the setups please click save button, system goes back to the previous menu.
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