Ethernet connection issues CM1150V

Mine is CM1100, and I'm having Comcast.

I gave up and went back to the Xfinity issue Xfi modem @ $14 per month for now 

They have the Phone /router/modem combo locked down  right now with the Arris 

Crafty devils have it so if you want the highest speeds you have to get the phone package 

And your seeing problems with the CM1100? 

Have the ISP check the signal and line quality UP to the modem. 
Be sure there are not coax cable line splitters in the between the modem and ISP service box. 
Be sure your using good quality RG6 coax cable up to the modem. 

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DarrenH wrote:

Mine is CM1100, and I'm having Comcast.

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"So do you have the CM1150V or the CM1100?

"My CM1100 connects with two routers separately with my ISP service. I get to separate networks behind my CM1100. LAG not enabled."

Furrye38 --

Sorry for the late inquiry.  If  iunderstand yiur earlier post you're running two networks on separate routers behind a CM1100.  Can I ask who you use as an ISP?  I'm upgrading to a comcast plan that includes one of our voice landlines and am trying to decide between the CM500V and the CM1150V.  My initial inclination was to go with the latter, on the assumption that with four ethernet ports I would be able to hang a least two routers (one wireless, the other exclusively for hard-wired machines) off the modem.  The bulk of this thread (and other posts elsewhere) suggests not, although much of it is devoted to distinguishing between modems and modem/router combinations.  But your observation about hanging separate routers off each ethernet port of a CM1100, which the Netgear CM1100 literature clearly suggests is feasible, leads me to wonder why they would omit that same feature from the CM1150V, with its four ethernet ports. 

Am I right that the CM1150V does not incorporate that feature?  If so then I'd probably just get the CM500V (I have no need of gigabit incoming speed), and if I really wanted an isolated hard-wired network I'd just get as cheap a second incoming external line as I could find, and run it as a completely separate network (problem from a different ISP).

FYI the current router is a Checkpoint 730, and the router on the second network would be an older Checkpoint version. 

Thanks for any insight you might have to offer. 

Best

-- Ted

SparkLight

I stumbeled across this on the CM1100. I was also under the asumption of if you had 1 WAN modem that you got 1 IP address from the ISP and that all the other ports on the back would not be active or usage or you had to enable LAG on the 1100 then it would work with a LAG enabled host router. With these modems that have two or more WAN ports in back, Seems that NG has put this feature in or some how makes it work behind the scenes. I also have a CM1200 which has the 4 ports in back however I didn't test my therory out at the time. I should one of these days. I have had some concerns about my ISP looking at this or finding out and saying, you can only have 1 IP per house hold. I haven't got or heard anything from the ISP since putting this in place which was last year when I upgrading to 1G service. I was only thinking that if I can share what I pay for on two separate networks, Even if LAG was enabled, then it would work. And it does. 

I don't know if the CM1150v has the same abililty. I never demo'd this modem. I can only presume that the 1150v is possibly the CM1100 with the phone support added. I could be wrong though. You could try it out and see. If not, then try the CM1100 or 1200.

You will need a router to connect to the CM modem. CM modems are just modems. There are no routers built in for these modes. 

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RTSwiss1 wrote:

"So do you have the CM1150V or the CM1100?

"My CM1100 connects with two routers separately with my ISP service. I get to separate networks behind my CM1100. LAG not enabled."

 

Furrye38 --

 

Sorry for the late inquiry.  If  iunderstand yiur earlier post you're running two networks on separate routers behind a CM1100.  Can I ask who you use as an ISP?  I'm upgrading to a comcast plan that includes one of our voice landlines and am trying to decide between the CM500V and the CM1150V.  My initial inclination was to go with the latter, on the assumption that with four ethernet ports I would be able to hang a least two routers (one wireless, the other exclusively for hard-wired machines) off the modem.  The bulk of this thread (and other posts elsewhere) suggests not, although much of it is devoted to distinguishing between modems and modem/router combinations.  But your observation about hanging separate routers off each ethernet port of a CM1100, which the Netgear CM1100 literature clearly suggests is feasible, leads me to wonder why they would omit that same feature from the CM1150V, with its four ethernet ports. 

 

Am I right that the CM1150V does not incorporate that feature?  If so then I'd probably just get the CM500V (I have no need of gigabit incoming speed), and if I really wanted an isolated hard-wired network I'd just get as cheap a second incoming external line as I could find, and run it as a completely separate network (problem from a different ISP).

 

FYI the current router is a Checkpoint 730, and the router on the second network would be an older Checkpoint version. 

 

Thanks for any insight you might have to offer. 

 

Best

 

-- Ted

 

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Thanks. That's helpful. I suspect you're right about the derivation of the CM1150V, and I might give it a try.  But if it doesn't work I'll probably settle for CM500V, since we don't need or have gb service; most of our work is transferring academic/business files, not hidef streaming.   I was aware that either device lacked any router, as we had invested in a business level router for its security services that we're happy with. 

Thanks for the information.  If you do test your theory on the CM1200 I would be interested in hearing what you find. 

Best.

-- Ted

Let us know what you find out. 

I had a very similar problem. I ultimately solved it by having my entire system  connected as I wanted it (i.e., the ethernet cable connected between the cable modem and the wifi router), with everything powered on, then called Comcast/Xfinity on my cell phone. I verbally spoke the option "no internet connection" when the robot asked me to describe my problem at which point the robot reset my entire system remotely. It sent me a text message saying it was starting the reset and then hung up on me. Ten minutes later I got a message that my system had been reset. At that point, I was able to go through Netgear's protocol of setting up my new Wifi router, which included updating the Wifi router's firmware. It was however, obvious as soon as Xfinity had reset my system that things were going to work.

Further comments

1. I spent many hours trying to troubleshoot this before hitting upon the relatively quick solution above.

2. I called Comcast/Xfinity twice before my successful call. For these first two calls I had said I need to "Activate my system". Each time I was connected to a human. The first human got my information then tried to transfer me to an activating agent at which point my call was dropped by Comcast. The second agent insisted that I did not need to activate, said she had been working for Comcast for 20 years, that she could not possibly be wrong, and hung up on me. So the trick was getting a robot, not a human.

3. Comcast documentation and human advice seem to convey that once the cable modem is working, it doesn't matter what is hooked up downstream. This is demonstrably false. I was able to hook up only one device at a time (my old wifi router, or my computer directly, or my new wifi router, or another computer). In order to swap these out, I needed to use my cell phone to call Comcast and have the robot reset my entire system. In the case of directly connecting a computer, there was a way to do this directly form the computer browser, but I couldn't figure out how to do this directly with a wifi router.

4. Before hitting on the correct solution, I tried a number of tricks, like setting a static IP to the router equivalent to the IP that Comcast had previously assigned my desktop computer. But I was not successful.

5. I was getting close to giving up an surrendering and buying an Xfinity Gateway. Xfinity definitely has a conflict of interest in providing advice or making it easy to connect your own gear.

6. It wasn't strictly true that I had "no internet connection" because I did have a connection through my desktop computer. I just couldn't figure out how to change that connection to the wifi router.

7. I was not able to update the Netgear Nighthawk router's firmware until after I had the system reset by Comcast.

8. Merely turning off the power to the cable modem does not work. It has to be reset remotely by Comcast.

Have the ISP check the signal and line quality UP to the modem. 
Be sure there are no coax cable line splitters in the between the modem and ISP service box. 
Be sure your using good quality RG6 coax cable up to the modem. 
Be sure to power OFF the modem for 1 minute them back ON.

You can factory reset the CM modem your self as well. There is a reset button on the modem. Press and hold it for 15 seconds then release.