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96
Note: When PPPoE is enabled, modification of IP Address, Subnet Mask, and Gateway becomes
prohibited.
• IP Address: This field allows the user to enter a custom IP address.
• 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.
• 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 DVR’s IP. That is to say, 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. That is to say,
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 DVR 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. Preferred DNS server: This field allows the user to enter the DNS
server IP address.
• Alternate DNS server: This field allows the user to enter the Alternate DNS server IP address.
• LAN download: This checkbox allows the user to enable the user to process the downloaded data first.
The download speed is 1.5X or 2.0X compared to the normal streaming speed.
Note: To test the network connections set in this menu, click on the Test button. To apply the settings to your
DVR, click on Apply. If you wish to exit this menu, click on the Back button.
6.2.2. Connection
This screen allows users to configure port connections. It is important that the system is rebooted if any
changes are made to the settings on this screen. Also, ensure that port values do not conflict. Below is a
screenshot of the connection screen:
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