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Netgear C3000 not connecting to Internet (Comcast)


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#1 jadesage

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Posted 16 October 2017 - 02:26 AM

Computer: Acer E5-521-23KH

OS: Windows 10

Internet: Cable

Connection: Wireless

Modem/Router: Netgear C3000 N300

 

Hello, I have a Netgear C3000 N300 wireless modem/router, and it was working fine when I had WOW internet. But I've stopped service with them and signed up for Comcast Xfinity. I had help from Comcast both with a technician over the phone and eventually one sent to my house, and neither of them could get my modem/router to connect to the internet. 

 

All the lights stay on except the second from the bottom (looks like a little globe), which just blinks on and off.

 

When connected to it I can view the router's ip address page, but nothing else.

 

I also tried a factory reset, but it didn't help.

 

I tried using Windows troubleshooting, and it says the DNS Server isn't responding.

 

It's only about a year old so I don't see how it could be broken, and it's listed as a compatible device on Comcast's website, so I don't know what the problem is. If anyone knows what I can do to keep on using it, I'd appreciate it.



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#2 Wand3r3r

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Posted 16 October 2017 - 08:54 AM

Going to windows is pointless if you don't have internet to the router.

 

Did Comcast "provision" the router?  This is where they register the wan port mac address for your access.

 

What does the modem part of the router say?  Errors?



#3 jadesage

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Posted 16 October 2017 - 07:22 PM

I think they were trying to when I spoke with their tech support over the phone, I gave the make and model and the lady kept saying she couldn't "see" it.

 

Looking at it's IP address page, under Cable Connection it says "In Progress." When I click on it it say "Your modem is offline. Please check the RF connection."



#4 Wand3r3r

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Posted 16 October 2017 - 07:29 PM

i suspect there is something wrong with your cable line.  Try replacing the coax cable you have between the router and wall with a new one.  Otherwise call comcast and get a tech out.

comcast not seeing your modem indicates a break between them and you.



#5 jadesage

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Posted 16 October 2017 - 08:10 PM

What's weird though is that they did send a tech person out and he couldn't do anything either. He hooked up one of comcast's modem/routers to the same cable and they were able to see it and activate it. Does that mean something is wrong with my modem/router? Like I said, I used it for WOW just last month, and it was working fine :-\

 

Thank you for your help by the way :D



#6 Wand3r3r

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Posted 16 October 2017 - 10:19 PM

Starting to look that way.  I would suggest setting the router back to factory specs and see if that makes a difference.  You will still need to contact Comcast to have them provision the modem/router.  Hopefully they will see it then



#7 arlattimor

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Posted 17 October 2017 - 04:02 AM

Jadesage try this, remote into your router and go into the wan section and manually assign a public DNS Server. I have Comcast and have experienced your issue. I use DNS Servers from L3 & Google pick 1 from L3 and 1 from Google and manually assign to your router.

 

Level3 209.244.0.3 209.244.0.4
Google 8.8.8.8 8.8.4.4

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#8 coxchris

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Posted 17 October 2017 - 07:23 PM

On some Netgear routers, you have to force it to use the current firmware. Comcast doesn't handle or push the firmware to Own Customer Products. See if any updates to it and then download the appropriate file using manual upload.

 

When switching ISP if it wasn't decommissioned correctly, it could get confused on CMAC level. So your probably want to make sure that CMAC is off for WOW Internet

 

Say this to WOW Internet

 

"I have switched to Xfinity I need to know if the CMAC has been removed from your database."

 

Say this to Comcast

 

"On this Account. I have my modem, and I recently switch from WOW to Comcast. Can you please Provision my modem with this CMAC on my account."


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#9 jadesage

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Posted 23 October 2017 - 07:31 PM

Hello all, thank you for your help. I ended up getting a new modem/router and it connected fine :P






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