C6300v2 Upstream speed awful

Question

Hello. I have been having a ton of issues with my upstream connection lately. I have Cox Communications as my ISP and I have contacted them multiple times but of course they are useless in helping me solve the issue. Anyway, I used to be getting 30mbps+ Upstream and now I can barely exceed 15mbps and often times its stuck below 7mbps. My plan includes 30mbps+on my upstream as well. I also have unlimited data so it isn't the data cap interfering. I was told by my ISP that they are sending and pinging perfectly fine speeds and having nor seeing issues with my equipment. On my gaming and streaming PC I am hardwired and only recently started having this issue. ISP says that it seems to possibly be an internal failure in my modem. I am also using a R7400 Nighthawk router extrernally connected to it. Can anyone analyze the logs and Down and Upstream Channels? I am new to all of this and would like some additional insight on if my ISP is actually right and I need to go buy a new modem or if they're wrong and it's their problem. Thank you much!

Procedure	Status	Comment
Acquire Downstream Channel	969000000 Hz	Locked
Connectivity State	Ok	Operational
Boot State	Ok	Operational
Security	Enabled	BPI+
IP Provisioning Mode	Honor MDD	honorMdd(4)

Downstream Bonded Channels

Channel	Lock Status	Modulation	Channel ID	Frequency	Power	SNR	Correctables	UnCorrectables
1	Locked	QAM 256	9	831000000 Hz	-0.7 dBmV	37.6 dB	0	0
2	Locked	QAM 256	10	837000000 Hz	-0.5 dBmV	38.6 dB	0	0
3	Locked	QAM 256	11	843000000 Hz	-0.5 dBmV	37.3 dB	0	0
4	Locked	QAM 256	12	849000000 Hz	-0.5 dBmV	37.6 dB	0	0
5	Locked	QAM 256	13	855000000 Hz	-0.9 dBmV	37.3 dB	0	0
6	Locked	QAM 256	14	861000000 Hz	-1.0 dBmV	37.6 dB	0	0
7	Locked	QAM 256	15	867000000 Hz	-1.2 dBmV	37.3 dB	0	0
8	Locked	QAM 256	16	873000000 Hz	-1.5 dBmV	37.3 dB	0	0
9	Locked	QAM 256	25	927000000 Hz	-2.2 dBmV	37.3 dB	1281	6339
10	Locked	QAM 256	26	933000000 Hz	-2.5 dBmV	37.3 dB	0	0
11	Locked	QAM 256	27	939000000 Hz	-2.5 dBmV	36.6 dB	0	0
12	Locked	QAM 256	28	945000000 Hz	-3.0 dBmV	37.3 dB	0	0
13	Locked	QAM 256	29	951000000 Hz	-3.2 dBmV	36.6 dB	0	0
14	Locked	QAM 256	30	957000000 Hz	-3.2 dBmV	36.6 dB	0	0
15	Locked	QAM 256	31	963000000 Hz	-3.2 dBmV	36.3 dB	0	0
16	Locked	QAM 256	32	969000000 Hz	-3.2 dBmV	36.3 dB	0	0

Upstream Bonded Channels

Channel	Lock Status	US Channel Type	Channel ID	Symbol Rate	Frequency	Power
1	Locked	ATDMA	1	5120 Ksym/sec	16900000 Hz	42.0 dBmV
2	Locked	ATDMA	2	5120 Ksym/sec	23500000 Hz	43.5 dBmV
3	Locked	ATDMA	3	5120 Ksym/sec	29900000 Hz	43.5 dBmV
4	Locked	ATDMA	4	5120 Ksym/sec	36300000 Hz	45.0 dBmV

LOGS:

Apr 01 2020 23:08:35	Notice (6)	TLV-11 - unrecognized OID
Apr 01 2020 23:08:35	Warning (5)	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Apr 01 2020 19:50:09	Warning (5)	Lost MDD Timeout
Apr 01 2020 19:50:05	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync
Mar 29 2020 19:34:35	Warning (5)	Lost MDD Timeout
Mar 29 2020 19:34:29	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync
Mar 29 2020 07:49:19	Critical (3)	No Ranging Response received - T3 time-out
Mar 28 2020 20:01:53	Notice (6)	TLV-11 - unrecognized OID
Mar 28 2020 20:01:53	Warning (5)	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Mar 28 2020 18:02:11	Notice (6)	TLV-11 - unrecognized OID
Mar 28 2020 18:02:11	Warning (5)	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Mar 28 2020 17:55:41	Warning (5)	Lost MDD Timeout
Mar 28 2020 17:55:36	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync
Mar 26 2020 21:10:25	Notice (6)	TLV-11 - unrecognized OID
Mar 26 2020 21:10:25	Warning (5)	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Mar 24 2020 16:55:58	Notice (6)	TLV-11 - unrecognized OID
Mar 24 2020 16:55:58	Warning (5)	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Mar 19 2020 19:18:03	Critical (3)	No Ranging Response received - T3 time-out
Mar 19 2020 14:50:13	Notice (6)	TLV-11 - unrecognized OID
Mar 19 2020 14:50:13	Warning (5)	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Mar 19 2020 14:39:29	Notice (6)	TLV-11 - unrecognized OID
Mar 19 2020 14:39:29	Warning (5)	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Mar 19 2020 14:21:06	Notice (6)	TLV-11 - unrecognized OID
Mar 19 2020 14:21:06	Warning (5)	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Mar 19 2020 14:09:39	Notice (6)	TLV-11 - unrecognized OID
Mar 19 2020 14:09:39	Warning (5)	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Mar 15 2020 21:11:45	Notice (6)	TLV-11 - unrecognized OID
Mar 15 2020 21:11:45	Warning (5)	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Feb 15 2020 07:31:26	Critical (3)	No Ranging Response received - T3 time-out
Feb 13 2020 16:38:39	Notice (6)	TLV-11 - unrecognized OID
Feb 13 2020 16:38:39	Warning (5)	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Feb 13 2020 16:26:20	Notice (6)	TLV-11 - unrecognized OID
Feb 13 2020 16:26:20	Warning (5)	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Feb 09 2020 15:26:11	Critical (3)	SYNC Timing Synchronization failure - Loss of Sync
Feb 08 2020 21:22:19	Notice (6)	TLV-11 - unrecognized OID
Feb 08 2020 21:22:19	Warning (5)	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Jan 21 2020 13:49:40	Critical (3)	No Ranging Response received - T3 time-out
Jan 20 2020 23:42:24	Notice (6)	TLV-11 - unrecognized OID
Jan 20 2020 23:42:24	Warning (5)	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Jan 17 2020 22:35:11	Notice (6)	TLV-11 - unrecognized OID

FURRYe38 · Answer

Remove the R series router and connect PC and your gaming devices directly to the C series mode.

Wire connect your gaming devices to the either modem or router. Its preferred over wireless for gaming.

Be sure there are not coax cable line splitters in the between the modem and ISP service box.
Be sure your using good quality RG6 coax cable up to the modem.

Or you can bridge the C modem and then connect your R series router to the modem.

rosemonttt · Answer

If I were to connect my gaming PC to my modem, wouldn’t it interfere with my wifi connection that my mobile devices and Apple TV need to use? I am currently hardwired to my Router (R device). There are no splitters along the line that I know of. I need the router for my WiFi enabled devices that I cannot hardwire.

FURRYe38 · Answer

Connected to the modem wired?&nbsp;Either shouldn't interfere with other devices...

rosemonttt · Answer

I am getting a new better moden today to test it and hopefully improive my speeds back to what they were. I thought my PC had to be wired to my router otherwise it wouldn't work. I could totally be wrong though.

FURRYe38 · Answer

Its has to be wired to a router of some forum. If your getting a modem with a built in router then connect it here. If your getting a modem only then you'll need a external router to connect to the modem.&nbsp;

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C6300v2 Upstream speed awful

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