CM3000 Slow Login with New Firmware (V6.01.03)

When you are resetting the modem to factory defaults with the paper clip, are you depressing and holding the button in for about 25-30 seconds ? If not, a short push is only like a power cycle / reboot operation.

Ok, yep. When the username / password reverts to the original default, it's a full reset. So perhaps it is indeed a glitch with that latest firmware, although I haven't seen any similar reports here yet. But it may be too soon for a pattern to have shown up. Sometimes they have to revert the firmware back to the prior version while they iron out the glitches. 

Wish I had something else for you.... Good luck with it ! Please post back with any changes / updates. Thank you.

I am having the same issue. XFinity tech came out today and thought nothing of the firmware update. They replaced a coax in the box on my houses. My issues with intermittent connection started this last week. Another tech is coming out tomorrow to replace all outside lines to the nub?? Are they wasting their time or what? Again, all was working fine until the last week. I'm having to constantly restart the modem to get functionality back to my routers. I'm not sure what the factory reset will accomplish. Thanks. 

Update: 2nd guy was out today and replaced lines. Still experiencing intermittent loss of internet connection and extremely slow ability to access the modem web interface before it goes down yet again. The xFinity app wants to send yet another technician out tomorrow. This will be the third. The guy today was thorough and excellent but couldn't figure out what the issue is. He had me on speaker w/his supervisor. I was also given his phone # and just left the supervisor a message. We should not be having to contact Netgear when they provide Xfinity with software to tweak and push out to their customers when they see fit to do so. The disconnect is occurring at the modem. All tests were running positive from XFinity systems. While blame started to get placed with the router system and the fact we own our equipment, I ventured to go there but can't when it just crashed again w/a PC hard wired directly to the modem. 

I have the same issue and it started in the last 10 days. Slow web and intermittent drops. The drops always seem to conincide with a "US Profile" change. Also I'm on the 2.5G tier and I do notice throughput is lagging (1.3-1.5Gbps instead of my usual 2.3) periodically. If I reboot the cm3000 throughput returns and web is snappy. The throughput issue also clears up after a while so maybe is unrelated and I have two issues. They were working on our street last week. Was the v6 firmware recently pushed? 

Does anyone know if Netgear will push out a fix or if Xfinity will roll back the update? I've been have intermittent disconnects since last week. The only temporary fix is to restart the modem. 

Thanks for the post. Nice to validate I am not alone. I'm now dealing w/2nd tier Netgear support. They continue to say modems are essentially "dumb" machines only meant to translate analog and digital signals. We pay good money for the DOCIS 3.1. The reason I am pushing Netgear, is that I continue to test with a PC hard wired to the modem. Meanwhile... the Xfinity app we're all pushed to use, will say my modem is offline when I am standing right in front of it watching it work, the routers are green and I'm using that very internet connectivity to talk to the app?? I'll contact the Xfinity Supervisor again later today as no one on this site has responded. 

So glad I am not alone I thought I was going insane Had 3 techs come out and still having my modem randomly restarting 

On replacement modem #2 now. Internet connection drops continue. Netgear has been useless. I found a really good article on a Netgear forum. Link below. A responder also suggested trying out the Xfinity modem as a part of the troubleshooting process. Primarily a story of Comcast challenges, how to interpret your modem log, what to look for, etc. LINK: https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html Stay tuned... 

Tech on site of course could not back rev the firmware. I received a call from the comcast escalation dept and they told me first they don't distribute the firmware but after I kept reading what was on the netgear sit that said otherwise, they said they did push it but they have no control over the quality of it because it is an owned modem. They said it's entirely up to netgear and I should work with them.  I spoke with netgear and they said comcast should not be using that version, they expect them to be using v5, but I pointed out they don't write firmware so comcast had to get it from you. Netgear wants me to call back and have a level 2/3 call, but I'm out of town the next 5 days so I'll have to pick up when I get back. Things are working ok for me with the daily reboot. I will say if you are on the 2.5G plan like me there is a throughput gradual degradation. By end of day I'm getting 1.7-1.8Gbps instead of 2.2-2.3Gbps which I get right after rebooting. I'm sure is some kind of leak happening in this firmware.

Well, sheesh, if I lock in for 5 years my internet price goes down $8/mo plus the xfi gateway is free for 5 years. So I just switched plans and will put the thing in bridge mode. [Edited: "Solicitation"]

To both @slthomas00 & @dsm1212 -  A few comments. I could share the lengthy logs - but have "0" correctable and uncorrectable entries. Just periodic drops. Visual assessment has also varied; i.e. last night, the modem upstream / downstream lights started flashing (lack of connection) but this morning both those lights stayed solid. It's the TP Link Deco Routers (BE65 Pro) that reminds me w/the red lights I've lost connectivity. Last night I had to physically reset the modem. This morning, it and the router decided to get along and all started working again. And yes, I've reviewed all settings on their end. It's the critical errors in the modem's event log no one wants to address. Here's a quick snippet of the most recent events - I deleted the MAC addresses: 

As for Netgear - NO help. More finger pointing as to who does what and takes any kind of ownership for the firmware updates. I'm surprised you (dsm1212) even got that response. I got the figurative blank stare not understanding the difference between v5 and v6. I keep reminding myself - this is new equipment as of 1/22/25. Got thru a few bumps and all worked well since - until now. NOTE: I had used the CM2000 & a prior version Deco router before - NO issues. @slthomas00 - to continue using my mesh router system w/a XB8 - I'm told the XB8 would need to be put in bridge mode. Please confirm. As for monthly expenses - I am on the Gigabit X2 plan at a one-year promo @ $95/month. Then up to $124. Data is capped at 1.2TB/month. I pay Google TV an additional monthly fee. Your stated rates sound insanely good. Haven't set up continuous ping tests. 

My "stubbornness" is still fighting the good fight but not getting me anywhere. I'm keeping the Xfinity Supervisor updated though. Disconnects are now occurring easily twice a day. @slthomas00 - thank you as well for the tips should I go that route. What intrigues me now - is how did both of you get that 5-year special; i.e. over the phone or in a local store? Are you both still on the 2GB plan? My patience is wearing thin - sounds enticing... 

I am having the exact same issue with CM3000 v6.01.03.

"The V6.01.03 firmware update, pushed by Xfinity, causes the web GUI (accessible via http://192.168.100.1) to become extremely slow or unresponsive. This issue is consistent across browsers and devices, suggesting a modem firmware bug, possibly related to high CPU usage or memory management/leak issues."

Is there a solution to this issue as yet? Is a rollback of the firmware possible?