I recently moved to a new house and having troubles with my cable modem rebooting. I have no idea how many times per day, but it happens at least a few times while I'm actively browsing--or using RDP to do some work from home. It's slightly better if I have no splitter on the line, but still happens enough for me to notice it. To answer the obligatory questions:
1) Hillsdale, MI
2) Above
3) Intermittent
4) Moto SB6121. Same happened with the Cisco modem that I still have from Comcast.
5) WZR-HP-AG300N connected directly to cable modem, Meraki MR12 behind it.
6) No firewall.
Here are the signal levels:
Downstream Bonding Channel Value
Channel ID 5 2 3 4
Frequency 507000000 Hz 537000000 Hz 543000000 Hz 549000000 Hz
Signal to Noise Ratio 37 dB 38 dB 38 dB 38 dB
Downstream Modulation QAM256 QAM256 QAM256 QAM256
Power Level
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-4 dBmV -3 dBmV -4 dBmV -4 dBmV
Upstream Bonding Channel Value
Channel ID 2 1
Frequency 23500000 Hz 28500000 Hz
Ranging Service ID 9303 9303
Symbol Rate 5.120 Msym/sec 2.560 Msym/sec
Power Level 49 dBmV 49 dBmV
Upstream Modulation [3] QPSK
[3] 64QAM
[3] QPSK
[2] 16QAM
Ranging Status Success Success
Signal Stats (Codewords) Bonding Channel Value
Channel ID 5 2 3 4
Total Unerrored Codewords 62744183 61640784 61640874 61640788
Total Correctable Codewords 10 0 0 0
Total Uncorrectable Codewords 656 495 552 472
I also get one of these every time it happens:
Jan 01 1970 00:00:21 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=00:01:5c:45:96:42;CM-QOS=1.1;CM-VER=3.0;
I also get a T4 R04.0 error every time it happens, but I just reset my cable modem to defaults and it wiped the logs.
Without the splitter my signal is slightly better. The downstreams are all at 0dBmV and upstream around 45dBmV. I haven't caught the upstream being over 50 without the splitter but I have seen it at 51dBmV with the splitter.
I've followed the wire from the pole. Looks like it comes from a tap with 4 outlets to another pole, through some trees to my house, then runs down to a splice screwed into the house. The other side of the splice is a cable that runs along the side of my house, into my basement, through my floor, into either the splitter or the cable modem.
I'm open for ideas. I tried chatting with Comcast and he blamed it on my account not having a username tied to it, said I wasn't fully activated or something ridiculous.
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