Visitor
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3 Messages
Upgraded to x2 Plan. Download speeds increased, upload still at around 30mbps
Hi.
I upgraded yesterday from a 1gb/30mbit plan to x2 which is 2gb/300mbit. My download speeds increased to approximately 2gigabit, but my upload speeds have not changed and are still at around 20mbit.
My modem is a self-owned Motorola MB8611. This modem has a 2.5Gb ethernet port. I have that port connected to the 10Gb port on my router, which is a UniFi UDM Pro. I have measured speed as follows:
- Using the UDM Pro's built in speed measurement: Down: over 2gb. Up: 30mbit
- Speedtest on a Mac connected via 1gb ethernet to the UDM Pro: Down: 1gb. Up 30mbit (obviously can't exceed the mac <-> router 1Gb connection)
- Mac connected directly to the modem: Down: 1Gb. Up: 30mbit (again, won't go faster than 1gb due to the 1gb interconnect)
I have seen numerous threads on this forum about people having this problem. The resolution has always been for someone from Xfinity to either correct something on the backend or to provision the customer's modem correctly.
I am requesting similar assistance. I don't believe further troubleshooting on my end is required - I hope I've provided enough information to establish that.
I look forward to hearing from someone. Thanks!
Accepted Solution
BruceW
Gold Problem Solver
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26K Messages
22 days ago
The MB8611 is not compatible with the new higher upload speeds. Only a few retail devices are. See the "Next Gen" list at the top of the "All Compatible Devices" link near the bottom of https://www.xfinity.com/support/devices (at the moment it points to https://assets.xfinity.com/assets/dotcom/projects/cix-4997_compatible-devices/2024.09.18%20Full%20List%20of%20Compatible%20Devices.pdf, but this changes from time to time). Also see:
For faster upload you need one of Comcast's newer rental gateways (XB6, XB7, XB8) or one of the few retail devices shown in the "Next Gen Speed Tier" group with an upload speed rating in the "All Compatible Devices" PDF:
The Reddit link (if they ever get the page back online) lists the approved devices as well as other requirements for faster upload speeds.
Realize that although Comcast calls some devices "Compatible" and some "Recommended", for all but a few devices those designations only mean "compatible/recommended for use with their Internet service", and not necessarily approved for the new upload speeds.
Comcast could make all of this much simpler and clearer, but they have chosen not to do so.
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XfinityJosephA
Official Employee
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1.4K Messages
23 days ago
Hello, @zend since you have done a lot of troubleshooting feel free to send us a direct message. So we can take a closer look at your signal quality and connection. You can use the Direct Messaging icon at the top of the page to send your name and service address to "Xfinity Support." It's next to the bell icon on the right side of the page
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XfinityRichard
Official Employee
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1.4K Messages
23 days ago
It was a pleasure, @zend working with you in private today and getting you taken care of. Please don't hesitate to reach back out if there is anything in the future we can assist you with, we'll always be here for you.-Richard
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