Visitor
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8 Messages
Not getting 1 GB speeds with Arris SB8200 (Supported Modem by Xfinity) - Docsis 3.1 continually switches between Green and Blue Light
Just switched to the 1GB plan and I rarely get more that 400mbps with ethernet wired. I am getting 42mbps upload speeds so that appears to be working but the download speeds seem to be off. The front light for receive is mainly green most of the time which means its connected to DOCSIS 3.0 but it should be Blue for 3.1.
My last 10 speed tests are as follows: 249mbps, 736, 915, 754, 857, 227, 221, 674, 892 and 295. It jumps all over the place. Help!
Andyr1
Gold Problem Solver
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8K Messages
4 years ago
You need to post your signal levels and event log to see if there is a problem there.
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BruceW
Gold Problem Solver
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26.4K Messages
4 years ago
Note that the SB8200 is NOT approved for Gigabit service ("Wired Download Speed: Up to 957 Mbps"). See https://www.xfinity.com/support/devices.
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BruceW
Gold Problem Solver
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26.4K Messages
4 years ago
You'd think so, but using devices with speed tiers for which they are not approved tends to produce unexpected results.
When you say that http://192.168.100.1 "doesn't work", could you describe what happens when you click that link in a bit more detail? Any error messages?
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thebus3677
Visitor
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8 Messages
4 years ago
The speed just fluctuates so much. My last 4 tests were 254, 263, 223 and 305. Earlier in the day it was anywhere from 237, 602, 826, 173, 509. Xfinity keeps having me troubleshoot things but it's the same steps. I am at my wits end. I should be getting consistent speeds for what I am paying for (gig service). Is there anyone that can help?
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BruceW
Gold Problem Solver
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26.4K Messages
4 years ago
Please see Internet Troubleshooting Tips. If you can't find the problem or you'd rather have Comcast take care of it, call them at the phone number on your bill or 1-800-Comcast, or use one of the options on https://www.xfinity.com/support/contact-us/. It's not likely they can fix the problem remotely. If not, insist they send a tech out to identify the cause and correct it.
If the tech finds bad coax, splitters, amplifiers, or connections in your home (even if Comcast originally supplied them) you'll probably have to pay for the visit unless you have their Service Protection Plan ( https://www.xfinity.com/support/articles/service-protection-plan, closed to customers that don't already have it). If the trouble is due to a faulty Comcast rental device or anything outside your home you shouldn't be charged.
Also, you need to replace your modem with one approved for your speed tier, or switch to an Internet plan speed for which the device is approved.
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