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

Responses

shudson89

Regular Visitor

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8 Messages

1 year 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.

1 year ago

0

CCGina

Official Employee

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800 Messages

1 year 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,

1 year ago

0

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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

1 year 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

1 year ago

0

U

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.

1 year ago

0

CCGina

Official Employee

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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

1 year ago

0

BruceW

Gold Problem Solver

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25.5K Messages

1 year 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

1 year 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

1 year 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

1 year 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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user_9a40a9

Slow connection 90 Mbps vs 800 Mbps

shudson89

CCTimothyA

CCGina

shudson89

user_9a40a9

CCGina

user_9a40a9

CCGina

BruceW

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.

user_9a40a9

flatlander3

Jlavaseur

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