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Dell PowerConnect 2824 w/ two DHCP

Posted on 2017-03-13
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Last Modified: 2017-03-13
I have a 2824 managed switch that my LAN is running on, access to WAN is through a firewall providing NAT and DHCP.  

I also have an NVR with a built-in POE switch, that has its own DHCP server for the cameras.  

What I would like to do is connect the 2824 to the NVR PoE so I can manage those cameras as the NVR does not do NAT.  Best suggestion / walkthrough on how to accomplish this?

Thanks in advance.
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Question by:Pinellastek
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6 Comments
 
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Expert Comment

by:masnrock
ID: 42046494
You're going to have to have the cameras connected directly to the NVR if you're not planning on buying more hardware. Otherwise, you're going to need an inline injector in order to power the cameras (hopefully the cables are direct from the patch panel to the cameras, with no intermediate switches).

What I would recommend is that you create a VLAN that's solely for the camera side of the network, with the subnet utilizing the IP range and subnet that the NVR and cameras should utilize. Then you can have the NVR remain as the DHCP server as you would not have created another DHCP server on that subnet.
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Author Comment

by:Pinellastek
ID: 42046571
So then how do I get a computer on the LAN side of things to communicate with a camera on the NVR side?
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Expert Comment

by:masnrock
ID: 42046637
Just make sure to have access rules that allow traffic between both VLANs. And I'd probably only allow traffic between the LAN and the NVR's IP itself, not the entire security network. That should be all you have to have. Plus might as well keep it well restricted from the start.

Not sure which firewall you're using, but if it's a business class one, you should be able to create the second VLAN on it.
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Author Comment

by:Pinellastek
ID: 42046712
So for clarification the setup is as follows:
WAN -> MikroTik RB2011UiAS-RM Firewall / Router 10.10.10.0/24 -> Dell PowerConnect 2824 Managed Switch -> All my regular network stuff.
NVR LAN side 10.10.10.4 -> into the Dell switch (Accessing the web interface of the NVR fine this way)
NVR PoE side that issues DHCP for cameras 10.10.20.0/24 -> all the cameras connect to this.  [/list][/list]

So I want to setup the 10.10.20.0/24 to be able to communicate with the 10.10.10.0/24 network without opening the x.x.20.x network up to the WAN - Do I set the VLAN up on the DELL or the Mikrotik or both?
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Accepted Solution

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masnrock earned 2000 total points
ID: 42046726
I happen to be a person who likes to keep the VLANs created at the firewall/router level (this is also where you'd be creating the access rules). But nonetheless, you have to be sure that you have the VLANs also existing in the 2824 as I am assuming that your NVR will be connected to the switch, not the MikroTik.
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Author Closing Comment

by:Pinellastek
ID: 42046788
Thanks, I appreciate the pointers.
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