Is DSL modem-router slowing entire home network?

[liv2nxs]

I recent upgraded a home network to add IP cameras for local security. The cameras are connected to a Netgear WNDR 4300 dual gigabit router via an Engenius ENH200 WDS Bridge and viewed using a web browser. The cameras work fine when connected to the router without internet.

When our ISP's IT person connected the wireless router to the ISP-provided Zyxel P660R-F1 modem-router, then there are intermittent problems with camera viewing. He ran a speed test and noted that there was a significant reduction (something like 700kbps down to 150kbps) with the cameras connected. The IT person wsaid that we would need a seperate network for the cameras, which doesn't seem necessary to me in concept.

To be clear, I am not trying to view the cameras remotely over the slow DSL connection - I only view them on the local network. I am wondering if the 24Mbps limit of the router is somehow limiting the entire local network. The router specs say that the LAN port is 10/100, but perhaps that doesn't matter.

FYI. the 2 cameras are 1080p @ 15fps, which equates to about 8Mbps total.

Any suggestions?

 

[bill001g]

Did he connect the wan port or the lan port of your netgear to the zyxel. If it is the wan port then the networks are completely isolated. The camera traffic should never attempt to go to the internet so it should never cross the wan port. I suppose you could remove the default gateway on the cameras to be sure but they should not just send traffic to random ip.

If he hooked lan-lan then your netgear need to run as a AP. The most critical part is that the DHCP server must be disable. You also need to be sure the router do not use the same lan ip.

The only way I could see camera traffic sending data to the other router is if it was broadcasting the traffic out. Some cameras have this ability but it is mostly multicast and not broadcast. You could see by loading wireshark on a pc and see if you see traffic from cameras even when you are not running any applications asking for data.