Contributor
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58 Messages
Less than half the speed on Gigabit Extra with Ethernet
When I had just the Gigabit plan, I used to regularly clock 900+Mbps on my desktop connected with ethernet cable. The configuration is Netgear CM1100 modem ==> Orbi RBR50 router==> Netgear 1 gig switch ==> Desktop. When my plan was automatically upgraded to gigabit extra, I am no longer able to get to the 900 Mbps speed. I clock 500 Mbps or below in the Xfinity speed tests. I totally understand that I can't get the full 1.2 GBPs with my current equipment, but why is my speed limited to 500 Mbps, suddenly?
I read somewhare that the CM1100 is only capable of 949 Mbps, but I'd be so glad to get that instead of 500 Mbps I am getting now! I also read that somehow reprovisioning the modem helped resolve the speed issue. How do I do that?
Accepted Solution
Shankarhokie
Contributor
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58 Messages
1 year ago
I am not sure what the problem was, but a tech came home and we powered down the CM1100, Orbi, the Netgear gigabit switch. Started up the 1100, and his equipment recorded a solid 940/45. Connected the Orbi, and he recorded a 940/45 from a gigabit port. Then we connected the switch, and he recorded a 940/45. Then we tested the upstairs satelitle and the switch and it was a solid 940/45. My wife's laptop connected via ethernet showed 920/42 on the xfinity speedtest.
I am not sure what the technical issue is, but it seems to e resolved for now.
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BruceW
Gold Problem Solver
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26.3K Messages
1 year ago
Note that the CM1100 is not approved for use with Gigabit or Gigabit Extra service. Comcast rates the it for use with plan speeds "Up to 945 Mbps". See the "All Compatible Devices" link near the bottom of https://www.xfinity.com/support/devices which, at the moment, points to https://assets.xfinity.com/assets/dotcom/projects/cix-4997_compatible-devices/2023.11.22%20Full%20List%20of%20Compatible%20Devices.pdf.
Using devices on speed tiers for which they are not approved tends to produce unexpected results, often speeds below plan speed. Consider picking up one of the devices that is approved for Gigabit service, or dropping back to a lower tier.
AFAIK Comcast has never said how they provision devices operating on speed tiers they're not approved for. All I can tell you is that many customers who tried it have reported that they don't get full speed. There's a tendency to think the device will operate at the maximum speed it is capable of, but that doesn't seem to be the case.
Please be aware that there are 2 kinds of responses in this Forum: Replies and Comments. When you Comment on a post by scrolling down to "Comment on this post here...", I am notified of your response. But if you select Reply, I am NOT notified and may not be aware of your response.
(edited)
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BruceW
Gold Problem Solver
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26.3K Messages
1 year ago
When Comcast first introduced Gigabit service they approved a bunch of devices for it which were later demoted from Gigabit back to a number around 940. Why? They've never said. Since The Great Gigabit Demotion, they seem to be requiring all devices they approve for Gig and Gig+ service to have 2.5 Gb (or higher) ports. The CM1100 doesn't have a 2.5 Gb port.
Please be aware that there are 2 kinds of responses in this Forum: Replies and Comments. When you Comment on a post by scrolling down to "Comment on this post here...", I am notified of your response. But if you select Reply, I am NOT notified and may not be aware of your response.
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XfinityArmand
Official Employee
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2.1K Messages
1 year ago
Hello there @Shankarhokie! Thank you so much for taking the time to reach out to Xfinity Support here on our Community Forum. We are so glad to hear from you and happy to assist in any way that we can to have this issue addressed for you. No worries! You have reached out to the right team to get this taken care of. Please feel free to shoot us a private message so that we can get started on this for you.
To send a "direct message" / "private message" message to Xfinity Support:
• Click "Sign In" if necessary
• Click the "Direct Message" icon or https://forums.xfinity.com/direct-messaging
• Click the "New message" (pencil and paper) icon
• The "To:" line prompts you to "Type the name of a person". Instead, type "Xfinity Support" there
• - As you are typing a drop-down list appears. Select "Xfinity Support" from that list
• - An "Xfinity Support" graphic replaces the "To:" line
• Type your message in the text area near the bottom of the window
• Press Enter to send it
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