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Forum Discussion
Very slow Internet Download Speeds even after Xfinity repairs in my area
Even after Xfinity completed repairs in my area for performance related issues and even though I worked with Xfinity support, I continue to get extremely slow internet download speeds (about 10-20% o...
What was the interval of time you used between the throughput tests?
- 1 hour
You mentioned Xfinity attempted to re-provision your modem. What happened?
- Nothing. Same as before
Have there been any recent driver or firmware updates on your computer?
- No, there haven't
One thing to check is the network profile on your computer. It should be private and not public. I have seen Windows updates that changed the profile as part of the update process.
- Yes, it's private. The issue happens with two separate computers: a laptop and a desktop
Your modem connects to a node through the coax cable. The node is where the signals are converted from a fiber optic connection to the coax signal. It is possible to saturate a node with repeated throughput tests.
Any time you boot up a device like a computer, it is subject to updates for drivers and firmware for a variety of systems. Microsoft does this at least twice a month and often daily. Your computer OEM also provides updates, but they are not usually forced on you like from the operating system. It would not hurt to verify with the OEM if the drivers/firmware for your Ethernet ports are current.
A stand alone modem has few if any settings you can adjust. I cannot see your re-posted images because a moderator has not approved them yet.
Hi,
After a good amount of troubleshooting, my cable modem is now consistently getting 700 Mbps download and 5 Mbps upload. That's a great improvement from before but not the speeds I'm paying for.
In speaking to Xfinity support, I found out that my cable modem (Netgear CM1000) is getting a "default" bootfile rather than the bootfile for my speed tier, namely Superfast which is rated for 800 Mbps download/20 Mbps upload. The Xfinity support representative indicated to me on the phone that the system does *NOT* provide her the ability to select the Superfast speed tier for my Netgear CM1000 and that's likely because the Netgear CM1000 isn't approved for that speed tier.
However, Netgear CM1000 does support the speeds for the Superfast speed tier.
"Certified with Xfinity with speeds up to 800Mbps, Spectrum service of 1Gbps, and with Cox service speeds of 1Gbps. Please check your cable Internet service provider website data speed tier compatibility (not compatible with Cable bundle voice services).Wireless router not included."
Source: https://www.netgear.com/home/wifi/modems/cm1000/
Additionally, I have had this modem for 5 years and, only until recently, I have been getting well above the 800 Mbps. Here is the last year of speed test results using SpeedTest.net:
Some of the performance issues as of late have, at least in part, been due to wiring issues and outages, etc.
This seems like a possible change in Xfinity's policies with regards to the Netgear CM1000. Is Netgear aware of this? Assuming that representative's from Netgear monitor this forum, can a Netgear representative confirm (or not) that the Netgear CM1000 is no longer supported on Xfinity's network for the Superfast speed tier (800 Mbps Download/20 Mbps Upload)?
Thanks,
Paolo
It's all up to the ISP to set policy to what they will support on there network.
NG doesn't monitor these forums.
Also the CM1000 line is mostly supported for lower end services. And most likely EoL due to its age so NG wouldn't be developing any new FW due to the cost of developing and certification at the ISP. NG is mostly working on CM2050v, CM2500 and CM3000 currently.
