CM1000v2 Slow Upload Speeds

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igorr wrote:

Just installed a CM1000v2 in place of the rented xfinity modem/router, activated it, and hooked it up to my PC with a CAT8 ethernet cable. The speeds I'm getting are 700 down/5 up. My plan is 1000 down/200 up. What could be causing the 5Mbps upload speed over gigabit ethernet? Cable connection and log screenshots attached.

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Your CM1000v2 is not on the Xfinity list of certified modems for connection to their Next Generation Speed network.

That means you do not have access to the 100/200 Mbps upload like you had through your rented gateway.

Here is the link to the most recent list: 

https://assets.xfinity.com/assets/dotcom/projects/cix-4997_compatible-devices/2024.04.03%20Full%20List%20of%20Compatible%20Devices.pdf

Additional details here:

https://www.reddit.com/r/Comcast_Xfinity/wiki/knowledgebase/next-generation-internet/