DS-7616N1-M2 2nd network input what's it?

[Decibel]

This NVR has two network inputs.
I assume they're independent.
So I tried connecting a video intercom to the second input, which is on a closed network with a different IP address range than first network.
If I set DHCP to this second network, the NVR assigns an IP address consistent with the range of the first input.
Obviously, it doesn't work.
But it doesn't work even if I set the IP manually because IVMS doesn't add it.
Perhaps this second input has another purpose.
What is it?

 

[Dan]

Hi @Decibel

See p6-7 of the NVR User Manual for more details of how the network configuration works.

You'll see it confirms that each LAN port connects to a separate NIC card.

 

[JB1970]

This NVR has two network inputs.
I assume they're independent.
So I tried connecting a video intercom to the second input, which is on a closed network with a different IP address range than first network.
If I set DHCP to this second network, the NVR assigns an IP address consistent with the range of the first input.
Obviously, it doesn't work.
But it doesn't work even if I set the IP manually because IVMS doesn't add it.
Perhaps this second input has another purpose.

NVRs with PoE ports for cameras use a different network range - 192.168.254.xxx by default and that keeps all camera traffic off the LAN. In your case where the NVR has no camera PoE ports the second network interface can be used for the same purpose (to keep the cameras off the LAN) by connecting it to a switch that will be used for cameras independently (rather than adding them via your main LAN). It can also be used for redundancy.

 

[sportster]

To compliment (or complicate) what was previously posted:

• it depends how Working Mode is selected for the NIC interfaces:
  • Multi-Address - yes they are independent interfaces
  • Net Fault-Tolerance - they are NOT independent. They act as 1 interface.

Rules for Multi-Address, EACH “physical” interface:

• is preferred to be cabled to a UNIQUE VLAN or switch (aka interfaces cabled to different networks)
• requires an IP Address in differing IP Address ranges. For example:
  • LAN 1 — 192.168.2.150
  • LAN 2 — 10.10.10.150
• Failure to do this and you’ll screw up the IP Routing table which is kept internally within the NVR

DHCP can be selected on either or both interfaces BUT remember you’ll need a DHCP Server on either or both corresponding networks. The NVR does NOT provide a DHCP Service for either interface.

Rules for Net Fault-Tolerance:

• you have 1 “logical” interface
• the 1 “logical” interface gets 1 IP Address. For example:
  • 192.168.2.150
• you MUST cable each “physical” interface into the SAME VLAN or switch. (aka interfaces cabled to the same network)
• in the event that 1 physical interface fails, the NVR will “re-bond” the IP Address to the surviving physical interface and, in an ideal world, keep on working.

DHCP can be used here as well, if you wish.