I've set up a camera system with all the cameras hardwired to a router. When I plug the router into the clients regular network, the dhcp from the two routers cross over and create problems. The client network is 192.168.1xxx. The camera network is 192.168.0.xxx. What am I doing incorrectly?

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    Impossible say from the information you've provided. It depends on your DHCP servers and their configuration, and the router configuration. – Andrew Schulman Mar 12 '18 at 19:10
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    So many questions, the first of which is, why are you plugging the cameras into a separate router? – joeqwerty Mar 12 '18 at 19:11
  • To keep the bandwidth off the main network. – Jeffrey Bowles Mar 12 '18 at 19:21
  • Return the router, buy a switch, or better yet return both routers, build a pfsense and vlan off the cameras, they don't need internet access. – Jacob Evans Mar 12 '18 at 19:22
  • At a minimum, turn off DHCP on one of the "routers" and use it as a switch. – Spooler Mar 12 '18 at 19:23

You have two separate networks. You likely have two DHCP servers (one per router) and it's not being attached to the network correctly.

If you're goal is to segregate the cameras from the regular network, use a switch which is cable of doing VLAN's and separate them that way. This allows the cameras network connectivity, and then you can use the firewall to block traffic as needed to the new VLAN. This also helps to avoid duplicating DHCP configurations.

Currently, you need to make sure that the WAN port on the second router is plugged into a LAN port on the primary router. This should block the DHCP values from being broadcast to the primary network, while still offering DHCP addresses to the cameras. You can then use the second router to provide static IP's to the cameras. You won't be able to access systems behind the second router (when connected to the primary network) without also configuring appropriate NAT/Firewall rules.

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    I'd bet that he plugged the one of the "switch" ports on the router (instead of the WAN port) into the office LAN which is why DHCP is being answered by both devices and causing issues. – ivanivan Mar 12 '18 at 20:10
  • I agree. It definitely sounds like a mis-wire which is causing DHCP to broadcast between the two networks. It's also possible there's some kind of loop in the connection as well. – Andrew Mar 12 '18 at 20:16

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