Home Network Connections

As far as connected directly to your modem, you are limited to 1 IP address on all tiers except Ultimate.  Therefor, you can have one device connected directly to the net.  If that device is a router, AFAIK, Cox doesn't limit the number of devices on the lan side of the router (your home network).  That's not to say there isn't a practical limitation.  Your limit depends on a bunch of factors ... bandwidth from Cox, your router, if you are connected over WiFi or wired, what each device is doing, etc.  A network can handle many more clients checking e-mail than simultaneously stream Netflix.  There is just so much simultaneous traffic you can get through the pipe.  Also, the router is just another computer in your network, it's job is to route traffic to and from the internet.  A router with an underpowered processor can also present a bottleneck.

Do you have a specific question?  Are you having problems connecting or bandwidth issues?

I have one modem (Motorola SB6141) and one wifi router connected to it, a Netgear Nighthawk R8000. My issue is that devices which are connected to the internet are suddenly disconnected and give messages like "cannot connect to internet". My issue is not related to bandwidth. I used less than 3% of my data allotment last month. I stream video using Netflix for  an hour 2 or 3 times per week.I do have a large number of devices that connect to the home network. Many also access the internet, but are generally quiescent until an event occurs. The devices which can be connected to my network are  2 desktops, 3 laptops, 3 tablets, 2 smart phones, 2 NOOK eReaders, 2 webcams, 2 printers, 2 network attached storage devices, 2 smart TVs, a smart Bluray DVD, a DirecTv video bridge and 2 clients,  a VOIP modem and a Honeywell Thermostat. Some are wired Ethernet, but most are wireless. At any given time there may be 12 - 15 devices that are turned on connected to the home network. There are only 2 people in the house, so there are at most 2 computing devices or 2 TVs being used simultaneously. The behavior is as if I have a maximum number of internet connections allowed and existing internet connections are broken when new ones are established. This is why I asked the original question. I have changed the wireless router 3 times, moving from a D-Link DIR-615 to a TP-2000, to the Netgear R8000. I have also changed out the Motorola modem. Nothing seems to fix the problem.

JerryB, you have a great router, it should be able to handle your network.  A couple of dozen devices with a dozen on at any time  isn't an unreasonable load.  Now, if all dozen were streaming Netflix in superHD at the same time, that's another story   I have about 21 devices on my network, 10-12 active at any time with a R6700 router.

First, there have been at least 10 firmware updates for the R8000 since it was released.  Are you on the most current version?  If not, I would update.

When you get the "not connected" message, is it just one device and all others work correctly?  Do you have to do anything to get the failing device to reconnect?  Is there anything in either the modem or router log at the time of the issue?  When a device is not connecting to the internet, can you connect to the modem through the router at 192.168.100.1?