MB8611 firmware version

I have a Motorola MB8611 modem(customer purchased) that keeps rebooting. See lots of posts on this same issue. Current firmware is 8611-19.2.18. Questions:
1) What version should it have?

2) Does Comcast update/push updates to customer owned modems?

Any insights appreciated...

Responses

Accepted Solution

U

user_ea58w6

7 Messages

2 years ago

I returned the MB8611 modem and replaced with an ARRIS S33. The new modem Has not rebooted since I initialized it.

Current uptime new modem: 1 days 17h:27m:43s

Xfinity could never tell me what modem firmware version I should have.

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0

EG

Expert

•

110.1K Messages

@user_ea58w6

Thanks for the update ! Hope things hold up for you ! Best of luck with it !

I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.

Was your question answered? Please mark an Accepted Answer! tick

I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.

Was your question answered? Please mark an Accepted Answer! tick

2 years ago

0

EG

Expert

•

110.1K Messages

2 years ago

What do the modem's signal stats look like ? Try getting them here; http://192.168.100.1

Please copy all of the text in its entirety of the *Downstream Power Levels*, the *SNR's* (Signal to Noise Ratios), and the *Upstream Power Level* numbers and paste them into your next post.

(edited)

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U

user_ea58w6

7 Messages

2 years ago

Connection

Startup Sequence

Startup Step	Status	Comment
Acquire Downstream Channel	609000000 Hz	Locked
Upstream Connection	OK	Operational
Boot State	OK	Operational
Configuration File	OK
Security	Enabled	BPI+

Connection Status

System Up Time	0 days 00h:04m:05s
Network Access	Allowed

Downstream Bonded Channels

Channel	Lock Status	Modulation	Channel ID	Freq. (MHz)	Pwr (dBmV)	SNR (dB)	Corrected	Uncorrected
1	Locked	QAM256	20	609.0	1.6	41.0	0	0
2	Locked	QAM256	1	489.0	1.3	41.1	0	0
3	Locked	QAM256	2	495.0	1.5	41.2	0	0
4	Locked	QAM256	3	507.0	1.3	41.2	0	0
5	Locked	QAM256	4	513.0	1.0	41.1	0	0
6	Locked	QAM256	5	519.0	0.8	41.0	0	0
7	Locked	QAM256	6	525.0	0.9	41.0	0	0
8	Locked	QAM256	7	531.0	0.9	41.0	0	0
9	Locked	QAM256	8	537.0	1.0	40.8	0	0
10	Locked	QAM256	9	543.0	0.9	41.0	0	0
11	Locked	QAM256	10	549.0	1.0	40.9	0	0
12	Locked	QAM256	11	555.0	1.2	40.9	0	0
13	Locked	QAM256	12	561.0	0.9	40.8	0	0
14	Locked	QAM256	13	567.0	1.0	40.8	0	0
15	Locked	QAM256	14	573.0	1.1	40.8	0	0
16	Locked	QAM256	15	579.0	1.1	40.8	0	0
17	Locked	QAM256	16	585.0	1.1	40.9	0	0
18	Locked	QAM256	17	591.0	1.3	40.9	0	0
19	Locked	QAM256	18	597.0	1.4	40.8	0	0
20	Locked	QAM256	19	603.0	1.5	40.9	0	0
21	Locked	QAM256	21	615.0	1.7	41.1	0	0
22	Locked	QAM256	22	621.0	1.7	41.1	0	0
23	Locked	QAM256	23	627.0	1.9	41.3	0	0
24	Locked	QAM256	24	633.0	1.7	41.0	0	0
25	Locked	QAM256	25	639.0	1.7	41.1	0	0
26	Locked	QAM256	26	645.0	1.8	41.2	0	0
27	Locked	QAM256	27	651.0	1.6	41.1	0	0
28	Locked	QAM256	28	657.0	1.5	41.1	0	0
29	Locked	QAM256	29	663.0	1.5	41.1	0	0
30	Locked	QAM256	30	669.0	1.4	41.1	0	0
31	Locked	QAM256	31	675.0	1.5	40.9	0	0
32	Locked	QAM256	32	681.0	1.2	41.0	0	0
33	Locked	OFDM PLC	193	762.0	0.5	40.0	1033422	0

Upstream Bonded Channels

Channel	Lock Status	Channel Type	Channel ID	Symb. Rate (Ksym/sec)	Freq. (MHz)	Pwr (dBmV)
1	Locked	SC-QAM	17	5120	35.6	50.3
2	Locked	SC-QAM	18	5120	29.2	49.5
3	Locked	SC-QAM	19	5120	22.8	48.8
4	Locked	SC-QAM	20	5120	16.4	48.8
5	Locked	SC-QAM	21	1280	39.6	47.8

Downstream Frequency Setting

Downstream Frequency Select

0

EG

Expert

•

110.1K Messages

2 years ago

This may or may not be the root cause of the problem (YMMV) but it should be addressed regardless. Just bear in mind that we have been seeing many many posts here lately that indicate a pattern that the 8611 is not playing nicely with the Comcast system / firmware.

The upstream power is on the high side and it may be intermittently fluctuating even higher to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.

In an effort to try to obtain better connectivity / more wiggle room, check to see if there are any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage from Home Depot, Target, Wal-Mart, etc. Splitters should be swapped with known to be good / new ones to test.

Also check the coax cable for any damage such as cuts, nicks, abrasions, kinks, sharp bends, etc.

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two-way splitter connected directly off of the drop from the street / pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.

Good luck with it !

(edited)

1

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U

user_ea58w6

7 Messages

Thanks for the quick response. We just got a new cable from comcast. The guy gave us a thick "AMPHENOL BBS TFC-T10 SHIELD X SERIES 6 CATV 18 AWG BLU DIRECT BURIAL" as the old one was cut in half by a street crew. I will set up a tech visit. Thanks again...

2 years ago

0

EG

Expert

•

110.1K Messages

2 years ago

Quite welcome ! Please post back here with how things turn out afterward, thanks.

0

Z

zandor60657

Contributor

•

204 Messages

2 years ago

Comcast pushes updates to customer owned modems and the Comcast current version is often different from the generic firmware. That said I'm not sure you have the right version. Is the firmware version stable? I found an old thread from almost a year ago about people having issues with firmware updates on an MB8611: https://forums.xfinity.com/conversations/your-home-network/mb8611-firmware/63886b8a39eb3658cfbb7083?page=1

People in that thread reported their modem was rebooting and flipping back and forth between 19.2.18 and 21.3.7.

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U

user_ea58w6

7 Messages

Thanks, yeah I saw that too.

2 years ago

0

XfinityGabriel

Official Employee

•

2.2K Messages

Hi, @user_ea58w6! I just wanted to check in with you today to see how the services are working and if you were able to set up that tech visit.

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

U

user_ea58w6

7 Messages

2 years ago

Appreciate everyone's comments/help on this...

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XfinityAirelle

Official Employee

•

2.5K Messages

@user_ea58w6 Hi there! We are happy to hear the modem replacement worked for you. Have you experienced any other service issues?

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

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MB8611 firmware version

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EG

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