Hi all, hoping someone could help here, I'm at my wits end trying to troubleshoot this and having a hard time getting in touch with support. I've started here, with no luck (https://forums.xfinity.com/t5/Your-Home-Network/Internet-Troubleshooting-Tips/m-p/3310447#M316652).
I'm on a wired connection. Really the only issue I'm having is playing online games ,streaming and normal day to day is just fine. I'm sure it happens throughout the day, but it's obviosuly extremely noticeable when playing games. I'll randomly get massive latency variation or dropped packets all togther. It will last for about 30 or seconds, and it will happen several times in a 10 minute time span. It also seems to be getting worse over the last few weeks. It seems to be related to the uplink., I've noticed when running a speed test and doing a constant ping to google.com, during the download phase I'll see one or two timeouts but the response time will sit around the normal 30-60ms. As soon as the upload phase starts, response times hold around 150-250ms with plenty of timeouts in between. DSLReports also typically gives me a C or D rating with Bufferbloat when running those tests.
I've tried several things, I upgraded to an SB8200 modem, I tried a few different routers (Netgear R7400 and AC1200 with both Netgear firmware and OpenWrt so I could try out the SQM plugin). I've updated splitters, coax throughout the house, just about everything.
Since I know modem signal stats will be asked for, here they are...
Downstream Bonded Channels
Channel ID
Lock Status
Modulation
Frequency
Power
SNR/MER
Corrected
Uncorrectables
21
Locked
QAM256
577750000 Hz
4.2 dBmV
40.7 dB
0
0
1
Locked
QAM256
457750000 Hz
3.7 dBmV
40.3 dB
0
0
2
Locked
QAM256
463750000 Hz
4.1 dBmV
40.4 dB
0
0
3
Locked
QAM256
469750000 Hz
4.4 dBmV
40.5 dB
0
0
4
Locked
QAM256
475750000 Hz
4.6 dBmV
40.4 dB
0
0
5
Locked
QAM256
481750000 Hz
4.5 dBmV
40.5 dB
0
0
6
Locked
QAM256
487750000 Hz
4.5 dBmV
40.4 dB
0
0
7
Locked
QAM256
493750000 Hz
4.1 dBmV
40.2 dB
0
0
8
Locked
QAM256
499750000 Hz
3.8 dBmV
40.1 dB
0
0
9
Locked
QAM256
505750000 Hz
3.7 dBmV
40.2 dB
0
0
10
Locked
QAM256
511750000 Hz
3.8 dBmV
40.2 dB
0
0
11
Locked
QAM256
517750000 Hz
4.1 dBmV
40.5 dB
0
0
12
Locked
QAM256
523750000 Hz
4.4 dBmV
40.6 dB
0
0
13
Locked
QAM256
529750000 Hz
4.6 dBmV
40.6 dB
0
0
14
Locked
QAM256
535750000 Hz
4.9 dBmV
40.6 dB
0
0
15
Locked
QAM256
541750000 Hz
5.1 dBmV
40.6 dB
0
0
16
Locked
QAM256
547750000 Hz
5.1 dBmV
40.8 dB
0
0
17
Locked
QAM256
553750000 Hz
4.9 dBmV
40.6 dB
0
0
18
Locked
QAM256
559750000 Hz
4.6 dBmV
40.5 dB
0
0
19
Locked
QAM256
565750000 Hz
4.3 dBmV
40.6 dB
0
0
20
Locked
QAM256
571750000 Hz
4.1 dBmV
40.5 dB
0
0
22
Locked
QAM256
583750000 Hz
4.3 dBmV
40.5 dB
0
0
23
Locked
QAM256
589750000 Hz
4.6 dBmV
40.5 dB
0
0
24
Locked
QAM256
595750000 Hz
4.8 dBmV
40.5 dB
0
0
25
Locked
QAM256
601750000 Hz
4.9 dBmV
40.5 dB
0
0
26
Locked
QAM256
607750000 Hz
4.7 dBmV
40.5 dB
0
0
27
Locked
QAM256
613750000 Hz
4.3 dBmV
40.3 dB
0
0
28
Locked
QAM256
619750000 Hz
4.0 dBmV
40.2 dB
0
0
29
Locked
QAM256
625750000 Hz
3.6 dBmV
40.1 dB
0
0
30
Locked
QAM256
631750000 Hz
3.2 dBmV
39.6 dB
0
0
31
Locked
QAM256
637750000 Hz
3.5 dBmV
39.9 dB
0
0
32
Locked
QAM256
643750000 Hz
3.7 dBmV
39.9 dB
0
0
159
Locked
Other
701000000 Hz
5.2 dBmV
39.2 dB
306783451
0
Upstream Bonded Channels
Channel
Channel ID
Lock Status
US Channel Type
Frequency
Width
Power
1
3
Locked
SC-QAM Upstream
23700000 Hz
6400000 Hz
42.0 dBmV
2
1
Locked
SC-QAM Upstream
36500000 Hz
6400000 Hz
42.0 dBmV
3
2
Locked
SC-QAM Upstream
30100000 Hz
6400000 Hz
43.0 dBmV
As for the logs, I do see a lot of "Dynamic Range Window violations", other than that it's just T3 timeouts here and there...
04/03/2020 17:43
2436694061
5
"Dynamic Range Window violation"
04/03/2020 17:43
82001100
5
"RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=14:c0:3e:0b:a0:ed;CMTS-MAC=00:5f:86:92:22:b2;CM-QOS=1.1;CM-VER=3.1;"
04/03/2020 17:39
2436694061
5
"Dynamic Range Window violation"
04/03/2020 17:39
82001100
5
"RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=14:c0:3e:0b:a0:ed;CMTS-MAC=00:5f:86:92:22:b2;CM-QOS=1.1;CM-VER=3.1;"
04/03/2020 17:21
2436694061
5
"Dynamic Range Window violation"
04/03/2020 17:21
82001100
5
"RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=14:c0:3e:0b:a0:ed;CMTS-MAC=00:5f:86:92:22:b2;CM-QOS=1.1;CM-VER=3.1;"
04/03/2020 17:17
2436694061
5
"Dynamic Range Window violation"
04/03/2020 17:17
82001100
5
"RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=14:c0:3e:0b:a0:ed;CMTS-MAC=00:5f:86:92:22:b2;CM-QOS=1.1;CM-VER=3.1;"
04/03/2020 17:11
2436694061
5
"Dynamic Range Window violation"
04/03/2020 17:11
82001100
5
"RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=14:c0:3e:0b:a0:ed;CMTS-MAC=00:5f:86:92:22:b2;CM-QOS=1.1;CM-VER=3.1;"
04/03/2020 17:07
82000200
3
"No Ranging Response received - T3 time-out;CM-MAC=14:c0:3e:0b:a0:ed;CMTS-MAC=00:5f:86:92:22:b2;CM-QOS=1.1;CM-VER=3.1;"
04/03/2020 17:07
84000500
3
"SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=14:c0:3e:0b:a0:ed;CMTS-MAC=00:5f:86:92:22:b2;CM-QOS=1.1;CM-VER=3.1;"
04/03/2020 16:55
2436694061
5
"Dynamic Range Window violation"
04/03/2020 16:55
82001100
5
"RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=14:c0:3e:0b:a0:ed;CMTS-MAC=00:5f:86:92:22:b2;CM-QOS=1.1;CM-VER=3.1;"
04/03/2020 16:55
82000200
3
"No Ranging Response received - T3 time-out;CM-MAC=14:c0:3e:0b:a0:ed;CMTS-MAC=00:5f:86:92:22:b2;CM-QOS=1.1;CM-VER=3.1;"
Any help is appreciated!
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