Visitor

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5 Messages

Friday, October 24th, 2025 10:21 PM

Netgear CM3000 issues. Hoping somebody can help.

Firstly, I have read thru several posts here regarding CM3000 and am aware of the issues and their possible solutions. I have a very similar situation to a user that was upgrading from a CM1100 to a CM3000 except that I don't have any line issues in the ground. My main issue is that coming off of the modem I was getting anywhere between 300-600Mbps and with my router (Asus RT-AC88U) my wifi speeds are at around 300-400Mbps. I've spoken with several tech support agents and they've all "provisioned" my modem and confirmed everything was good. They sent out a technician today that confirmed everything was good up to the modem (he was getting 2Gbps+ from the jack on the wall). I asked if he could check the speed coming off of the modem and he confirmed ~1000Mbps which he questioned seemed low because my plan is at 2Gbps and the modem is rated for 2.5Gbps. I mentioned about some of the known issues with the CM3000 firmware, but he couldn't do anything about that. 

My CM3000 is currently on v6.01.04 and when I login, via browser, it says my Connection Status: POOR and the downstream status is yellow. I will attach the event log. Could someone please help? Is there anything else I need to do? Do I have a bad modem?

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Visitor

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5 Messages

1 month ago

Small update. The technician had mentioned something about my downstream power being too high and I also chatted with Netgear support who confirmed also my downstream was too high. I managed to get an attenuator and now am getting all green for downstream and upstream thru the netgear gui. I'm still only getting ~500Mbps from the modem. Any help? 

Official Employee

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2.8K Messages

Thanks for posting on our Community Forums for assistance, phyko1. Are you hardwired to the modem or testing the wireless connection through your router? Are your devices capable of reaching 2 GB of speed? 

 

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Visitor

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5 Messages

I am testing the speed using speedtest.net on a laptop directly connected via Cat6 to the modem. All of my devices are minimum 1Gbps capable as I'm still averaging 350-500Mbps.

Official Employee

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264 Messages

 

phyko1, I understand. Thank you for sharing. Based on your statement, you've stated the technician tested the line, and stated you were recieving signals well, we've done the steps needed to make sure you are in optimized condition. 

 

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please, mark a reply as the Accepted Answer.tick

Contributor

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69 Messages

21 days ago

@phyko1 

Can you post a screenshot of your signal levels, SNR and error counts.

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