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user_9a40a9
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Friday, March 31st, 2023 10:26 PM

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Slow connection 90 Mbps vs 800 Mbps

​I have a 800 Mbps internet service and a Motorola MB8611 Multi-gig modem. However, when I do a speed test I only get 90 Mbps max. I have steady blue lights on the front panel which in theory should mean that I'm getting full 800 Mbps speed. However, the LAN jack on the back panel is lighted yellow. Per manual, this means that I only have 100 Mbps on the LAN. When I log in to the modem I see multiple channels locked and this line at the top

Acquire Downstream Channel 525000000 Hz

Locked

Any suggestions? Thanks

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2 years ago

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shudson89

Regular Visitor

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8 Messages

2 years ago

ive been getting these same speeds today,  different modem, but same speeds, now i have atech coming out tomorrow.

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CCTimothyA

Problem Solver

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785 Messages

 

shudson89 thank you for reaching out and bringing this to our attention. I can understand the frustration this has caused you. 

Could you please send our team a direct message with your full name and full address? Our team can most definitely take a further look at this issue.

 

To send a "Direct Message" ("Private") message:

Click "Sign In" if necessary

• Click the "Direct Message" icon

• Click the "New message" (pencil and paper) icon

• Type "Xfinity Support" in the "To:" line and select "Xfinity Support" from the drop-down list which appears. The "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

 

I no longer work for Comcast.

2 years ago

0

CCGina

Official Employee

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800 Messages

2 years ago

HI there @user_9a40a9, thank you for reaching out about the trouble with your MB8611.

 

There are multiple posts and threads about this, but this one has a lot of good information that sounds like it might be relevant in your case: MB8611 Problems and this one too: Motorola Mb8611 Not All Upstream Locking. Have you noticed T3 Timeouts in your logs as well?

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shudson89

Regular Visitor

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8 Messages

@XfinityGina​ i have an xfinity x1 modem, 

2 years ago

0

user_9a40a9

Visitor

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7 Messages

@XfinityGina​  Here is what I see when logged into my modem.

Connection
   Startup Sequence    
   Startup Step Status Comment

  
   Acquire Downstream Channel 525000000 Hz Locked
  
   Upstream Connection OK Operational
  
   Boot State OK Operational

  
   Configuration File OK
  
   Security Enabled BPI+
  


   Connection Status    
   System Up Time 0 days 00h:03m:14s  
  
   Network Access Allowed  
  


   Downstream Bonded Channels  
  
   Channel Lock Status Modulation Channel ID Freq. (MHz) Pwr (dBmV) SNR (dB) Corrected Uncorrected
   1 Locked QAM256 20 525.0 10.8 42.1 0 0
   2 Locked QAM256 4 411.0 11.7 42.3 0 0
   3 Locked QAM256 5 417.0 11.7 42.3 0 0
   4 Locked QAM256 6 435.0 11.7 42.2 0 0
   5 Locked QAM256 7 441.0 11.7 42.2 0 0
   6 Locked QAM256 8 453.0 11.7 42.2 0 0
   7 Locked QAM256 9 459.0 11.6 42.3 0 0
   8 Locked QAM256 10 465.0 11.5 42.1 0 0
   9 Locked QAM256 11 471.0 11.6 42.1 0 0
   10 Locked QAM256 12 477.0 11.6 42.0 0 0
   11 Locked QAM256 13 483.0 11.5 41.9 0 0
   12 Locked QAM256 14 489.0 11.7 42.2 0 0
   13 Locked QAM256 15 495.0 12.5 42.3 0 0
   14 Locked QAM256 16 501.0 12.1 42.1 0 0
   15 Locked QAM256 17 507.0 11.9 42.2 0 0
   16 Locked QAM256 18 513.0 11.7 42.2 0 0
   17 Locked QAM256 19 519.0 11.5 42.1 0 0
   18 Locked QAM256 21 531.0 11.7 42.3 0 0
   19 Locked QAM256 22 537.0 11.5 42.3 0 0
   20 Locked QAM256 23 543.0 11.4 42.2 0 0
   21 Locked QAM256 24 549.0 11.4 42.2 0 0
   22 Locked QAM256 25 555.0 11.7 42.4 0 0
   23 Locked QAM256 26 561.0 11.8 42.5 0 0
   24 Locked QAM256 27 567.0 11.7 42.3 0 0
   25 Locked QAM256 28 573.0 11.5 42.2 0 0
   26 Locked QAM256 29 579.0 11.2 42.0 0 0
   27 Locked QAM256 30 585.0 11.0 42.0 0 0
   28 Locked QAM256 31 591.0 11.0 41.9 0 0
   29 Locked QAM256 32 597.0 11.2 42.1 0 0
   30 Locked QAM256 33 603.0 11.0 42.1 0 0
   31 Locked QAM256 34 609.0 11.1 42.0 0 0
   32 Locked OFDM PLC 48 722.0 11.5 41.8 4385912 0


   Upstream Bonded Channels  
  
   Channel Lock Status Channel Type Channel ID Symb. Rate (Ksym/sec) Freq. (MHz) Pwr (dBmV)
   1 Locked SC-QAM 6 2560 10.4 37.0
   2 Locked SC-QAM 7 5120 16.4 37.8
   3 Locked SC-QAM 8 5120 22.8 38.5
   4 Locked SC-QAM 9 5120 29.2 38.5
   5 Locked SC-QAM 10 5120 35.6 38.5
   6 Locked SC-QAM 12 2560 40.4 38.8


   Downstream Frequency Setting    
   Downstream Frequency Select
  
  

2 years ago

0

CCGina

Official Employee

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800 Messages

Are you able to check the Event Log? That should show if there are T3 Timeouts occurring, although please delete your MAC address before copy/pasting for your security! 

 

And how do the connections look? Is the coaxial cable unkinked and unbent? Are the connections at either end snug, but not super tight? Is there a splitter on the line inside? Do you see any damage, fraying or corrosion on connections? Have you had a chance to try any troubleshooting? 

I no longer work for Comcast.

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please, mark a reply as the Accepted Answer.tick

2 years ago

0

user_9a40a9

Visitor

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7 Messages

@XfinityGina​ No T3 timeouts in the log.  Also, I've just finished talking with xfinitiy on the phone.  They ran their test and assured me that my speed is indeed 800 Mbps and that I need to talk to Motorola about this problem. On the page that I posted, at the bottom, there is a field Downstream  Frequency Select which is empty.  The modem manual says that I should enter some value there if instructed so by an Internet provider.  However, an xfinity agent had nothing to say about that.

2 years ago

0

CCGina

Official Employee

 • 

800 Messages

Thanks for your patience! I did a quick doublecheck, and it seems that we don't need/provide a value to enter for the Downstream Frequency Select, but from what I've seen in these forums Motorola has been really good to work with regarding the MB8611, so it definitely couldn't hurt to touch base with them! 

I no longer work for Comcast.

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please, mark a reply as the Accepted Answer.tick

2 years ago

0

BruceW

Gold Problem Solver

 • 

26K Messages

2 years ago

... 800 Mbps internet service ... MB8611 ... when I do a speed test I only get 90 Mbps max ...

That usually means either the device you are connecting to has only a 100 Mbps Fast Ethernet adapter, or a substandard (less than 5e) or defective Ethernet cable.

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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user_9a40a9

Visitor

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7 Messages

2 years ago

I tried my modem with an Asus gaming router and an LG laptop using different cables and getting the same result.  In the case of the LG, I connected it directly to the modem

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flatlander3

Problem Solver

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1.5K Messages

2 years ago

What's the Ethernet link speed say when you connect the LG directly to the X1?

Linux: # sudo ethtool eth0  -or- sudo ethtool eth0 | grep Speed:   (where eth0 is the device name for ethernet)

BSD:  # ifconfig

Windows: https://www.windowscentral.com/how-determine-wi-fi-and-ethernet-connection-speed-windows-10

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Jlavaseur

Problem Solver

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948 Messages

2 years ago

Well i have fixed perplexing speed issues by simple uninstalling my network card, rebooting and it reinstalls it, sometimes fixing a possible corrupt driver etc... 

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