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1225
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Mon, Sep 20, 2021 3:37 AM

Not getting package speed with SB8200

I have the 400 Mbps package but I can't get download speeds higher than 95 Mbps, despite upgrading our modem from an incompatible SB6183 to an SB8200 (Software Version AB01.02.053.01_112320_193.0A.NSH), which is listed as compatible with my package on the Xfinity website. Uploads have been above 20 Mbps on both modems. I activated the new modem two weeks ago and the speed is still the same as with the old one. 

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EG

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1 m ago

I am talking about directly to the 8200 cable modem (no router in the mix). Are you ? Does the computer that you are testing with have a 10/100/1000 (gigabit) ethernet port ?

(edited)

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1225

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@EG   Thank you. That worked. All my uncorrectable errors vanished too. So, my router is probably bad? It's pretty old. 

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EG

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FWIW, the router wouldn't have anything to do with the modems bit errors. When you power cycle a cable modem, it resets the bit error counters all to zero.

What is the exact make and model number of the router ?

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1225

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@EG  The router's an old RT-AC1200.

It's been almost two hours since I restarted the modem and there are still no uncorrectables. The last time I did I restarted it a week ago, there were about 10,000 on each channel within an hour. Maybe something was wrong with the signal last week. 

(edited)

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EG

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Is this with a WiFi connection ? If so, for a test, does a computer / device that is hardwired directly to the 8200 cable modem with an ethernet cable have the same problem ?

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1225

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1 m ago

Hardwired and wireless speeds are identical.

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EG

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1 m ago

That router has only 10/100 ethernet ports. You need something more modernwithmore horsepower !!

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