Connection dropping with Comcast

[Deleted member 22229]

ok lets hope this posts right....and they are in specs based on what i have read below 50....



Downstream Bonding Channel Value
Channel ID 11 13 15 16
Frequency 615000000 Hz 627000000 Hz 639000000 Hz 645000000 Hz
Signal to Noise Ratio 36 dB 35 dB 35 dB 36 dB
Downstream Modulation QAM256 QAM256 QAM256 QAM256
Power Level
The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading
-3 dBmV -3 dBmV -5 dBmV -4 dBmV
Upstream Bonding Channel Value
Channel ID 96 94 95
Frequency 35400000 Hz 22600000 Hz 29000000 Hz
Ranging Service ID 14781 14781 14781
Symbol Rate 5.120 Msym/sec 5.120 Msym/sec 5.120 Msym/sec
Power Level 43 dBmV 40 dBmV 41 dBmV
Upstream Modulation [3] QPSK
[3] 64QAM
[3] QPSK
[3] 64QAM
[3] QPSK
[3] 64QAM

Ranging Status Success Success Success
Signal Stats (Codewords) Bonding Channel Value
Channel ID 11 13 15 16
Total Unerrored Codewords 140114358 140119240 140120901 140117896
Total Correctable Codewords 3179 2307 2428 2611
Total Uncorrectable Codewords 12910 8885 7089 9939

Your levels are ok at this time as long as your downstream signals are not going much lower and the SNR's are stable. Your upstream is good. Here is a thread that tells all about comcast signals and SNR ratios.

http://forums.comcast.com/t5/Basic-.../Connection-Troubleshooting-Tips/td-p/1253575

 

[floorguy]

And the modem reports....

Aug 21 2014 15:59:04 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=b0:77:ac:29:aa:65;CMTS-MAC=00:01:5c:62:d4:5d;CM-QOS=1.1;CM-VER=3.0;
Aug 21 2014 15:30:37 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=b0:77:ac:29:aa:65;CMTS-MAC=00:01:5c:62:d4:5d;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:13 6-Notice N/A Cable Modem Reboot due to T4 timeout ;CM-MAC=b0:77:ac:29:aa:65;CMTS-MAC=00:01:5c:62:d4:5d;CM-QOS=1.1;CM-VER=3.0;
Aug 21 2014 15:29:55 3-Critical R06.0 Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=b0:77:ac:29:aa:65;CMTS-MAC=00:01:5c:62:d4:5d;CM-QOS=1.1;CM-VER=3.0;
Aug 21 2014 15:29:55 3-Critical R03.0 Ranging Request Retries exhausted;CM-MAC=b0:77:ac:29:aa:65;CMTS-MAC=00:01:5c:62:d4:5d;CM-QOS=1.1;CM-VER=3.0;
Aug 21 2014 15:29:54 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=b0:77:ac:29:aa:65;CMTS-MAC=00:01:5c:62:d4:5d;CM-QOS=1.1;CM-VER=3.0;
Aug 21 2014 15:29:38 3-Critical R06.0 Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=b0:77:ac:29:aa:65;CMTS-MAC=00:01:5c:62:d4:5d;CM-QOS=1.1;CM-VER=3.0;
Aug 21 2014 15:29:38 3-Critical R03.0 Ranging Request Retries exhausted;CM-MAC=b0:77:ac:29:aa:65;CMTS-MAC=00:01:5c:62:d4:5d;CM-QOS=1.1;CM-VER=3.0;
Aug 21 2014 15:29:37 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=b0:77:ac:29:aa:65;CMTS-MAC=00:01:5c:62:d4:5d;CM-QOS=1.1;CM-VER=3.0;
Aug 21 2014 15:29:17 3-Critical R06.0 Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=b0:77:ac:29:aa:65;CMTS-MAC=00:01:5c:62:d4:5d;CM-QOS=1.1;CM-VER=3.0;
Aug 21 2014 15:29:17 3-Critical R03.0 Ranging Request Retries exhausted;CM-MAC=b0:77:ac:29:aa:65;CMTS-MAC=00:01:5c:62:d4:5d;CM-QOS=1.1;CM-VER=3.0;
Aug 21 2014 15:29:16 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=b0:77:ac:29:aa:65;CMTS-MAC=00:01:5c:62:d4:5d;CM-QOS=1.1;CM-VER=3.0;
Aug 21 2014 15:02:09 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=b0:77:ac:29:aa:65;CMTS-MAC=00:01:5c:62:d4:5d;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:13 6-Notice N/A Cable Modem Reboot due to T4 timeout ;CM-MAC=b0:77:ac:29:aa:65;CMTS-MAC=00:01:5c:62:d4:5d;CM-QOS=1.1;CM-VER=3.0;
Aug 21 2014 15:01:22 3-Critical R06.0 Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=b0:77:ac:29:aa:65;CMTS-MAC=00:01:5c:62:d4:5d;CM-QOS=1.1;CM-VER=3.0;
Aug 21 2014 15:01:22 3-Critical R03.0 Ranging Request Retries exhausted;CM-MAC=b0:77:ac:29:aa:65;CMTS-MAC=00:01:5c:62:d4:5d;CM-QOS=1.1;CM-VER=3.0;
Aug 21 2014 15:01:21 3-Critical R06.0 Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=b0:77:ac:29:aa:65;CMTS-MAC=00:01:5c:62:d4:5d;CM-QOS=1.1;CM-VER=3.0;
Aug 21 2014 15:01:21 3-Critical R03.0 Ranging Request Retries exhausted;CM-MAC=b0:77:ac:29:aa:65;CMTS-MAC=00:01:5c:62:d4:5d;CM-QOS=1.1;CM-VER=3.0;
Aug 21 2014 15:01:21 3-Critical R06.0 Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=b0:77:ac:29:aa:65;CMTS-MAC=00:01:5c:62:d4:5d;CM-QOS=1.1;CM-VER=3.0;
Aug 21 2014 15:01:21 3-Critical R03.0 Ranging Request Retries exhausted;CM-MAC=b0:77:ac:29:aa:65;CMTS-MAC=00:01:5c:62:d4:5d;CM-QOS=1.1;CM-VER=3.0;

 

[Deleted member 22229]

Yeah that many errors are never good if they are all recent. Read that thread about signals your modem wont show. You can call and get those levels.

 

[floorguy]

Your levels are ok at this time as long as your downstream signals are not going much lower and the SNR's are stable. Your upstream is good. Here is a thread that tells all about comcast signals and SNR ratios.

http://forums.comcast.com/t5/Basic-.../Connection-Troubleshooting-Tips/td-p/1253575

So from when i posted that to now

the upstream has gone up...
Power Level 50 dBmV 41 dBmV 47 dBmV

what the crap??

 

[floorguy]

are up streams suppose to bounce

Power Level 46 dBmV 43 dBmV 43 dBmV

 

[F5ing]

are up streams suppose to bounce

Power Level 46 dBmV 43 dBmV 43 dBmV

Shouldn't jump that much. I could see +/-1 maybe 2.

Something flaky with your signal. Your ISP should be able to see it as well.

 

[KGB7]

Stop reading the logs and call Comcast. Tell them you need coaxial cable power booster, it will be installed for free. Docsis 3.0 modems are far more sensitive when it comes to power levels on coaxial cable.
If your modem continues to reboot, then get a new modem or rent one from Comcast.

I started renting modems from Comcast, as I had way too many units fail on me that I owned. $5 a month to rent a modem will give you a piece of mind for years to come. And if the unit fails, Comcast will give you a new and latest modem. My.last unit had a 4 port router and wifi .

 

[floorguy]

Stop reading the logs and call Comcast. Tell them you need coaxial cable power booster, it will be installed for free. Docsis 3.0 modems are far more sensitive when it comes to power levels on coaxial cable.
If your modem continues to reboot, then get a new modem or rent one from Comcast.

I started renting modems from Comcast, as I had way too many units fail on me that I owned. $5 a month to rent a modem will give you a piece of mind for years to come. And if the unit fails, Comcast will give you a new and latest modem. My.last unit had a 4 port router and wifi .

I plan to, I just want to go in with whats going on rather then trusting someone reading from a script "is your modem plugged in??, ok lets do a power cycle...blah blah blah"

I shouldnt need a booster as there is NOTHING else on my line...

And I bought a new modem to take that out of the equation....almost bought a new router till i found this board...


I saw a tech out a few mths ago doing some stuff, said they had people complaining about issues...(funny thing is, i was FINE at that point) So what ever they "fixed" threw mine out of balance.....

and $5 modem rentals was like 5 yrs ago....try $7, or they may be $8 by now, yea i think its $8 because i figured it would take 9 mths to be ahead

 

[F5ing]

You don't have a splitter mounted on the side or back of your house? If you do, take a look at that and all connectors/cabling that are visible.

 

[stevech]

are up streams suppose to bounce

Power Level 46 dBmV 43 dBmV 43 dBmV

Those numbers are fine. But look at them in the busy evening hour when the self-interference occurs.

Yes, upstream normally varies by 10dB or more. Not an issue unless it creeps up to mid-50's - where 58 or so is max. The upstream power is increased as need be to get a specific received signal strength at the cable co head-end. The upstream power setting is controlled by commands from the head-end.

If it gets to the 50's, esp. in prime time or wet weather, its a sign of problems in cable co system assuming your premises wiring is not at fault.

 

[Deleted member 22229]

Those numbers are fine. But look at them in the busy evening hour when the self-interference occurs.

Yes, upstream normally varies by 10dB or more. Not an issue unless it creeps up to mid-50's - where 58 or so is max. The upstream power is increased as need be to get a specific received signal strength at the cable co head-end. The upstream power setting is controlled by commands from the head-end.

If it gets to the 50's, esp. in prime time or wet weather, its a sign of problems in cable co system assuming your premises wiring is not at fault.

If you have upstream signals that varies by 10 db thats a big problem not normal at all. Also Docsis 3 standards are much tighter then Docssis 2 anything above about 51dbmv you will start to have issues on the comcast network. In a perfect world you want downstream as close to 0 as you can get it and upstream in the low to middle forties.

 

[LocalDude]

*sigh* Alright...

I just went through this problem myself with Comcast. I have a Motorola SB6141, and it turned out that IPV6 is not totally compatible with it. After troubleshooting and talking with Motorola, They advised me to call Comcast and have them turn IPV6 "Off". I believe they referred to it as "turning off the page file".

It doesn't make sense, but I had to argue with Comcast 3rd tier support, and they threaten all kinds of stuff, that "it may brick your mode" and that "they don't support Motorola SB6141", etc... blah, blah, blah...

They basically try to push you into renting one of their own "residential gateways" (they're JUNK), and gave me a whole bunch of hoopla. I got upset with them, and told them that it was a risk I was willing to take, in the case that my modem really did get "bricked".

After about 1 hour of waiting and arguing, they "disabled the tick-mark" on their end, and my service came back up.

The problem originated, after they sent a "data hit" to my modem the night before. I was down for about 18 hours... I'm good-to-go again. I hate Comcast, but I gotta say that they recently increased my speed from 60 Mbps to 105 Mbps download speed.

 

[Deleted member 22229]

I have the 6141 and have no issues with IPv6 there are some customers that are having issues with there download speeds tanking with the 6141 while upload remains stable. Comcast has a new firmware it is in its finale testing phase and should be released hopefully soon. But your the first i heard having IPv6 issues with the 6141. strange indeed most IPv6 issues i have come across are router related not modem. You could try the Zoom 5341J it is a docsis 3, 8x4 channel bonding and v6 ready and has had very good reviews with comcast. And agree there gateway devices are garbage stay far away if you can.

 

[KGB7]

*sigh* Alright...

I just went through this problem myself with Comcast. I have a Motorola SB6141, and it turned out that IPV6 is not totally compatible with it. After troubleshooting and talking with Motorola, They advised me to call Comcast and have them turn IPV6 "Off". I believe they referred to it as "turning off the page file".

It doesn't make sense, but I had to argue with Comcast 3rd tier support, and they threaten all kinds of stuff, that "it may brick your mode" and that "they don't support Motorola SB6141", etc... blah, blah, blah...

They basically try to push you into renting one of their own "residential gateways" (they're JUNK), and gave me a whole bunch of hoopla. I got upset with them, and told them that it was a risk I was willing to take, in the case that my modem really did get "bricked".

After about 1 hour of waiting and arguing, they "disabled the tick-mark" on their end, and my service came back up.

The problem originated, after they sent a "data hit" to my modem the night before. I was down for about 18 hours... I'm good-to-go again. I hate Comcast, but I gotta say that they recently increased my speed from 60 Mbps to 105 Mbps download speed.

Unbelievable!

I once had a huge argument with a tech tier 3 to turn off Constant Guard, as every PC and cell phone would give a message that one of the computers was infected with a virus.

Their Indian tech support told me to update java, I told him don't have java installed and don't want to install it. He put me on hold and disconnected the call few seconds later.

 

[Deleted member 22229]

Unbelievable!

I once had a huge argument with a tech tier 3 to turn off Constant Guard, as every PC and cell phone would give a message that one of the computers was infected with a virus.

Their Indian tech support told me to update java, I told him don't have java installed and don't want to install it. He put me on hold and disconnected the call few seconds later.

Classic.. Yep thats comcrap if they dont know what to do or say they simply end the call with a hang up. Classy act you have to love this company.

 

[KGB7]

and $5 modem rentals was like 5 yrs ago....try $7, or they may be $8 by now, yea i think its $8 because i figured it would take 9 mths to be ahead

I see they raised their prices. I was locked in to $5 many years ago. In the long run it was worth the fee, even $8/month. My own modems failed every single year, 4 modems with in 3 years.
Comcast modems failed as well, just not as frequently. But in the long run it was cheaper for me to rent it then to buy my own do to bad luck with Motorola modems.

Verizon gives you the modem, no rental fee depending on a promotion they are running for new install. Even if you buy their modem from them upfront, they will give you an upgraded version down the road for free.
Waited for 5 years to get FiOS service since the day they laid the cabling outside of our condo community. Walked my dog for many years past the white and orange posts that were labeld with FiOS warning label.

 

[F5ing]

My own modems failed every single year, 4 modems with in 3 years.

Guess I've been lucky with modems. Haven't rented for about 10 years and I've only purchased two. The second purchase was just to upgrade to DOCSIS 3, not because the first one crapped out (still have it for whatever reason -- hate to trash something that still works).

We've got fairly clean power where I live. I do keep it connected via a UPS though.



Guess I'd better knock on some wood now...

 

[floorguy]

well i am waiting for the fiber around here to get laid by me....

1 of the switch stations is literally 1/2 miles from me, but wont bring it to the neighborhood, "untill there is more interest"

DID YOU EVER THINK OF DOING DOOR FLYERS TO LET PEOPLE KNOW ITS AROUND THE CORNER???!!!!!!!

now there is another company that may buy it out and invest to build it out to every house in the city, and then charge a small (around $20) utility type fee, and that would include a 5 down and 5 up i think it was....Then you could upgrade to different tiers, for a little more, plus it brings in tv as well

 

[F5ing]

well i am waiting for the fiber around here to get laid by me....

Entirely inappropriate for this particular forum, especially by a user named "floorguy". ::

1 of the switch stations is literally 1/2 miles from me, but wont bring it to the neighborhood, "untill there is more interest"

DID YOU EVER THINK OF DOING DOOR FLYERS TO LET PEOPLE KNOW ITS AROUND THE CORNER???!!!!!!!

now there is another company that may buy it out and invest to build it out to every house in the city, and then charge a small (around $20) utility type fee, and that would include a 5 down and 5 up i think it was....Then you could upgrade to different tiers, for a little more, plus it brings in tv as well

Wow! Time to fire up your printer. Worth the ink/toner/electricity if successful.

 

[stevech]

If you have upstream signals that varies by 10 db thats a big problem not normal at all. Also Docsis 3 standards are much tighter then Docssis 2 anything above about 51dbmv you will start to have issues on the comcast network. In a perfect world you want downstream as close to 0 as you can get it and upstream in the low to middle forties.

I have to re-disagree on one point, and agree on the other. Ideally the upstream does not vary much. But in reality, it does, due to self-interference and cable co. system issues.

The upstream signal displayed on the web page is the level LEAVING THE MODEM. That gets attenuated by the number of/type of spiltters between the modem and exiting the premises. Example: Splitters add up to 9dB. Cable modem upstream must be stepped up by about 9dB to offset the splitter losses. You'll see that increase on the modem signal page.

Agree that signal level leaving your house should not get into the 50's.
In this area, TimeWarner's system is so hosed up that signals do get above 50 for hours at a time but revert to 40's later. Most every day you can see this in the evening busy hours. Happens to my neighbors, and to me with the Motorola and the Arris. For 15 years.

You can see it too on your cable TV set top box. It has an upstream like the cable modem -for switched digital video and video on demand, and box maintenance. Pushing secret keys on the remote will display signals, much like the 192.168.100.1 in the cable modem. When the modem upstream creeps up, so too does the set top box's upstream. Because the cable system is not what it should be.

None the less, my service is good last few years. No so prior to that, due to the illegal 4-way splitter (not under my control) I discussed earlier, plus TimeWarner's lousy system.

Some people have to use upstream amplifiers. These are uncommon. The modem web page will show lower signal than what is really leaving the premises, due to the upstream amp. Around here, they're used in condos/townhomes where the builder put TV coax (cheap crap) through adjoining homes' attics. Here, that is done and makes the run 150 ft to the demarcation point. In my case, neighbor unknowingly had 25 year old splitter in MY coax in HIS attic. Lord knows what happens in the other 3 attics, including damaged coax. It can be too that neighbor is stealing service. CableCo can't know.