Community Forum

Re: SB6121 issues with heavy uploading

New Poster

Re: SB6121 issues with heavy uploading

Wow! I am in pretty much the same boat!  Same SB6121 modem, and I've only started having connectivity issues when I switch on Backblaze to start my new cloud service backups. Within a day, often within an hour or two, I wil llose connectivity.  But if I switch OFF backblaze - the connection is solid for at least a week.  

Is it just Xfinity not wanting users to upload their backups to the cloud?  Or is there really something wrong with the modem?  I have been a dropbox user for years and upload large files to that regulary without issue. But click on Babcblaze to start backing up my files and WHAMMO!

Downstream

Bonding Channel Value

Channel ID

Frequency

531000000 Hz 

537000000 Hz 

543000000 Hz 

549000000 Hz 

Signal to Noise Ratio

38 dB 

38 dB 

38 dB 

38 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

2 dBmV  

2 dBmV  

2 dBmV  

1 dBmV  

 

Upstream

Bonding Channel Value

Channel ID

Frequency

17300000 Hz 

36500000 Hz 

30100000 Hz 

23700000 Hz 

Ranging Service ID

7665 

7665 

7665 

7665 

Symbol Rate

2.560 Msym/sec 

5.120 Msym/sec 

5.120 Msym/sec 

5.120 Msym/sec 

Power Level

42 dBmV 

42 dBmV 

42 dBmV 

42 dBmV 

Upstream Modulation

[2] QPSK
[1] 16QAM
[3] 64QAM
 

[2] QPSK
[1] 16QAM
[3] 64QAM
 

[2] QPSK
[1] 16QAM
[3] 64QAM
 

[2] QPSK
[1] 16QAM
[3] 64QAM
 

Ranging Status

Success 

Success 

Success 

Success 

 

Signal Stats (Codewords)

Bonding Channel Value

Channel ID

Total Unerrored Codewords

101176038 

101176040 

101176130 

101176837 

Total Correctable Codewords

14 

15 

14 

Total Uncorrectable Codewords

1553 

1560 

1462 

713 

Expert

Re: SB6121 issues with heavy uploading


@Scott_ wrote:

Is it just Xfinity not wanting users to upload their backups to the cloud?  Or is there really something wrong with the modem?  I have been a dropbox user for years and upload large files to that regulary without issue. But click on Babcblaze to start backing up my files and WHAMMO!

Eh? I back up to Google Drive and my wife to OneDrive, we both use iCloud Backup and iCloud Drive, Dropbox and Google Photos, all use large amounts of bandwidth, and we never have an issue with downloads nor uploads. 

Even you pointed out that Dropbox doesn't have any issues, so maybe it's an issue with your Backblaze account? Maybe their tech support has answers? 


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New Poster

Re: SB6121 issues with heavy uploading

The folks at backblaze point directly at Xfinity/Comcast.  Their service works - begins uploading file just fine - but sometimes after only a few minutes connection is lost.  So far it's ONLY with Backblaze... So I am going to try a bunch of others today - BOX, YouTube, and such.  I wish someone could look at the modem logs to get a better idea of specifics.  Maybe one of the Arris people could take a look?

Diamond Problem Solver

Re: SB6121 issues with heavy uploading


@Scott_ wrote:

 I wish someone could look at the modem logs to get a better idea of specifics.  Maybe one of the Arris people could take a look?


The RF signal stats that you posted are o/k. You did not post the "error log" entries.

New Poster

Re: SB6121 issues with heavy uploading

Here are some logs to look at.  I just got done with an upload test to Dropbox. after 10 or 15 min of uploading many files worth, I just stopped.  Then I switched on backblaze, it went through its creation of a file list, and began uploading... within about 15 min POW.

Can you gleen anything from this?  Is it in fact the moidem being pushed too hard by the Backblaze itself?  I pulled the plug on the router - gave it a few minutes, plugged it back in, and after a few minutes, I was reconnected.  I am beginning to think it's the backblaze App specifically that this router does not like.

Time Priority Code Message
Aug 13 2018 15:28:14 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=7c:bf:b1:d5:7a:e4;CMTS-MAC=54:a2:74:0d:e7:23;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:14 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=7c:bf:b1:d5:7a:e4;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Aug 13 2018 04:10:11 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=7c:bf:b1:d5:7a:e4;CMTS-MAC=54:a2:74:0d:e7:23;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:29 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=7c:bf:b1:d5:7a:e4;CMTS-MAC=54:a2:74:0d:e7:23;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:14 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=7c:bf:b1:d5:7a:e4;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Aug 12 2018 17:15:15 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=7c:bf:b1:d5:7a:e4;CMTS-MAC=54:a2:74:0d:e7:23;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:14 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=7c:bf:b1:d5:7a:e4;CMTS-MAC=54:a2:74:0d:e7:23;CM-QOS=1.1;CM-VER=3.0;
Aug 12 2018 15:20:04 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=7c:bf:b1:d5:7a:e4;CMTS-MAC=54:a2:74:0d:e7:23;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:30 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=7c:bf:b1:d5:7a:e4;CMTS-MAC=54:a2:74:0d:e7:23;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:14 6-Notice N/A Cable Modem Reboot due to IP loss ;CM-MAC=7c:bf:b1:d5:7a:e4;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Aug 12 2018 04:34:24 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=7c:bf:b1:d5:7a:e4;CMTS-MAC=54:a2:74:0d:e7:23;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:19 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=7c:bf:b1:d5:7a:e4;CMTS-MAC=54:a2:74:0d:e7:23;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:14 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=7c:bf:b1:d5:7a:e4;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;