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Forum Discussion
Ethernet connection issues CM1150V
Just purchased modem CM1150V, using OSX, Xfinity internet; in the past with other cable modems, I have always used a direct ethernet connection to my Mac through one ethernet port, and then connected...
> [...] in the past with other cable modems, [...]
Such as? "other cable modems" is not a very detailed description of
anything. (Probably not very accurate, either.)
If your old "cable modems" were actually modem+router combination
units, then that could explain the difference. A Netgear CMxxxx is a
modem only, not a modem+router. Typical residential Internet service
allows you one public IP address, hence one device connected to the
modem. If you want more devices, then you add a NAT router, connect the
router to he modem, and connect the devices to the router.
> [...] This is the first time I have ever not been able to have both
> the computer connected directly by ethernet, and the router connected
> via a second port.
"via a second port" on _what_, exactly?
What is your "the router"? Why not connect the router (WAN/Internet
port) to the modem (Ethernet port 1), and connect all your
computers/devices to your (unspecified) "the router"?
Visit http://netgear.com/support , put in your modem model number,
and look for Documentation. Get the User Manual. Read. Look for
"Ethernet ports".
http://www.downloads.netgear.com/files/GDC/CM1150V/CM1150V_UM_EN.pdf
Note Your cable modem comes with plugs that cover Ethernet ports
2, 3 and 4. For more information about Ethernet ports 2, 3,
and 4, visit netgear.com/support/product/CM1150V .
Fairly snarky reply. Fairly easy to see what the first person was saying. Basically, there are three ethernet ports that don't do what most people would assume they do (provide a wired connection the internet). When the ad on Amazon states "VERSATILE CONNECTIONS: 4 Gigabit Ethernet ports give you fast wired connections to your computer, separate Wi-Fi router, printer, game box, and other devices." it isn't that unreasonable to assume it has router capabilities. I made the same mistake. It appears that it does not. And even though it touts it is certified for Xfinity, knowing Xfinity only has one IP per household and requires routing for additional devices, it isn't very clear that it cannot do this.
And to your point of the user manual, yes, read it. Go to the link it points to for support and find something, ANYTHING, that explicitly says those ports cannot be used to connect to another device. It does say they are reserved for port aggregation, but then defines port aggregation as combining TWO ethernet ports to improve file transfer speed. Why do you need four ethernet ports if you only combine two, and you have a certified Xfinity device, and know Xfinity only gives you one IP, so you know the other two wouldn't work anyway? How do you aggregate two ports when one doesn't work (I don't really understand what port aggregation means here).
"What is your "the router"? Why not connect the router (WAN/Internet
port) to the modem (Ethernet port 1), and connect all your
computers/devices to your (unspecified) "the router"?"
That is easy, where the cable comes into my house is a terrible place for a wifi router, so I need to run it through the home network panel and ethernet to another port for wifi, but then need to connect to the network panel to provide wireline service to two other locations in the house for a couple of reasons.
> Fairly snarky reply. [...]
Fairly incomplete/uninformative problem description.
> [...] three ethernet ports that don't do what most people would assume
> they do [...]You're far ahead of me. I haven't surveyed enough people to know
what "most people would assume". When confronted with multiple Ethernet
ports on a _modem_ (not a router), my first reaction would be to get
some documentation which explained how to use them. Which I did.> [...] When the ad on Amazon states [...]
_Whose_ "the ad on Amazon"? Not my fault.
> [...] knowing Xfinity only has one IP per household and requires
> routing for additional devices, it isn't very clear that it cannot do
> this.
Who's "knowing" this? I know nothing, but I might guess that Xfinity
offers some level of service which involves a block of IP addresses.
I'd expect typical residential service to provide one IP address. So
I'd expect a _modem_ not to be able to improve upon that.> [...] Go to the link it points to for support and find something,
> ANYTHING, that explicitly says those ports cannot be used to connect to
> another device. [...]Go to that link and find _anything_ which supports your assumption?
> [...] where the cable comes into my house is a terrible place for a
> wifi router, [...]There are many ways to run (co-ax or Ethernet) cable from one place
to another, and many ways to disribute wireless-network signals in a
large building.
I gather that you bought a device which does not meet your
expectations, and you are unhappy. You seem to believe that those
expectations were reasonable, but they've proved to be wrong. If you
believe that you were misled, then you might direct your complaint to
the folks who led you. I'm not sure what you expect anyone in this
(mostly) user-to-user forum to do.- Ok champ, thanks for being super helpful to people.
I am neither unhappy or happy, the netgear owner posting on amazon was unclear, the user manual even less clear, the support page completely void of any thing helpful. I solved it another way, not a big deal.
Your responses win for least productive on this forum. Hats off I guess.Having just set up the CM1150V, I ended up on this thread looking for an answer to the same issues as above. Now I know, and yes, I agree, pretty snarky initial reply.
- I just purchased a used Netgear CM1150V Modem and had the same issue of only being able to have the laptop connected and nothing else at the same time. The people from Xfinity didn't know that either. They didn't have an answer for me. I ended up connecting my old Modem back.
The CM modem is only a modem, doesn't have any router features. To get more than one device connected, you need a external wifi router connected then you'll be able to connect more than one device.
Pg3 of the spec sheet shows a good example of how the modem can be use with just a PC or a external wifi router:
https://www.netgear.com/images/datasheet/networking/CableModems/CM1150V.pdf
Good Luck.
Rice69 wrote:
I just purchased a used Netgear CM1150V Modem and had the same issue of only being able to have the laptop connected and nothing else at the same time. The people from Xfinity didn't know that either. They didn't have an answer for me. I ended up connecting my old Modem back.
