Internet speed degrades...modem reboot fixes... is this normal?

[Rog-Pearl]

I have exactly the same problem. However I have an integrated Cable Modem Router.  Motorola Surfboard SBG6580-8.9.0.1-GA-00-092-NOSH, the later info being the software version. The connection slows down after hours or days, and a modem/router reboot restores the full speed. This is extremely annoying. This is not wireless this is wired ethernet.

What the heck is going on?

Date	Download Speed	Upload Speed	Test Server
10/7/2019 5:45:05 PM	121.55 Mbps	5.86 Mbps	Seattle, WA
10/10/2019 7:09:36 PM	19.87 Mbps	5.87 Mbps	San Jose, CA
10/10/2019 7:10:19 PM	42.01 Mbps	5.87 Mbps	Seattle, WA
10/16/2019 3:32:34 PM	7.05 Mbps	5.70 Mbps	Seattle, WA
10/16/2019 3:38:00 PM	150.83 Mbps	5.86 Mbps	Seattle, WA
10/18/2019 8:58:23 AM	29.83 Mbps	5.65 Mbps	Seattle, WA
10/19/2019 10:57:11 AM	10.53 Mbps	5.85 Mbps	Seattle, WA
10/19/2019 11:57:33 AM	134.14 Mbps	5.86 Mbps	Seattle, WA

[EG]

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

Try getting them here http://192.168.100.1 or here http://192.168.0.1

Default Username: admin
Default Password: motorola

Please post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.

[Rog-Pearl]

Downstream Bonded Channels
Channel	Lock Status	Modulation	Channel ID	Frequency	Power	SNR	Corrected	Uncorrectables
1	Locked	QAM256	9	513000000 Hz	2.2 dBmV	40.9 dB	2	0
2	Locked	QAM256	10	519000000 Hz	2.6 dBmV	41.3 dB	1	0
3	Locked	QAM256	11	525000000 Hz	2.4 dBmV	40.9 dB	3	0
4	Locked	QAM256	12	531000000 Hz	2.6 dBmV	41.3 dB	2	0
5	Locked	QAM256	13	537000000 Hz	2.2 dBmV	40.7 dB	3	0
6	Locked	QAM256	14	543000000 Hz	2.8 dBmV	41.0 dB	3	0
7	Locked	QAM256	15	549000000 Hz	2.7 dBmV	41.4 dB	3	0
8	Locked	QAM256	16	555000000 Hz	2.5 dBmV	40.8 dB	3	0

Upstream Bonded Channels
Channel	Lock Status	US Channel Type	Channel ID	Symbol Rate	Frequency	Power
1	Locked	ATDMA	4	5120 Ksym/sec	16200000 Hz	44.5 dBmV
2	Locked	ATDMA	1	5120 Ksym/sec	35700000 Hz	43.7 dBmV
3	Locked	ATDMA	2	5120 Ksym/sec	29200000 Hz	42.7 dBmV
4	Locked	ATDMA	3	5120 Ksym/sec	22700000 Hz	43.7 dBmV