How do I get traffic from one LAN to another?

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wlmoate

Reputable
Oct 10, 2014
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Hi,

We have a LAN set-up (A) that has a ADSL router which is connected to a unmanaged switch which in turn is connected to a number of PC's. There is also an IP door panel that has an integral camera.

We also have a separate LAN (B) that has 32 IP cameras connected via an unmanaged PoE switch and a Digital Video Recorder (DVR) The IP door panel camera on network A we would like to record the stream on the DVR on Network B.

The reason for the cameras and DVR been on a separate network is due to the bandwidth used by the cameras.

What equipment/config do I need to allow the DVR to access the stream on network A,?

 
Solution
B
If you actually want to keep them separate you need a router. Since you are only talking about a single machine you can use a consumer grade router. You would put the lan b on the lan side and let the wan side get a address from lan A. You could then put the DVR in the DMZ or port map it.

Still it will be much easier to just connect these together and assign ip address that work for both networks.

The theory you need a separate network because of bandwidth is flawed. The key thing to know is traffic between machine on a lan use MAC addresses to communicate directly. A switch will directly send traffic only to the ports with the proper mac address. So say you had 4 machines. A,B,C,D all on the same switch. A and B are...
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bicycle_repair_man

bicycle_repair_man

Splendid
Jan 10, 2014
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Assuming that these LANs are on different subnets, with different ADSL lines and both sites have a decent firewall, your best bet is to create an IKE tunnel linking the two subnets. To do this, each ADSL router will need to have a static IP address on the WAN side. You then use the firewall or router to establish a IKE tunnel between the two LANs.
 
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bill001g

Titan
Aug 9, 2012
28,319
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If you actually want to keep them separate you need a router. Since you are only talking about a single machine you can use a consumer grade router. You would put the lan b on the lan side and let the wan side get a address from lan A. You could then put the DVR in the DMZ or port map it.

Still it will be much easier to just connect these together and assign ip address that work for both networks.

The theory you need a separate network because of bandwidth is flawed. The key thing to know is traffic between machine on a lan use MAC addresses to communicate directly. A switch will directly send traffic only to the ports with the proper mac address. So say you had 4 machines. A,B,C,D all on the same switch. A and B are sending 1g/sec of data between them and C and D trying to send data. These are completely independent. The traffic between A and B will not degrade the traffic between C and D. Most modern switches can run all ports at maximum speed in and out all simultaneously.

So if you were to hook your current camera PoE switch to your router so the door panel camera could access the DVR the only traffic that would flow over that cable would be the traffic between the door camera and the DVR any other traffic between the cameras and the DVR would stay only on the switch and never come to your router of other devices on your current A network.
 
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