Modem reboot helps for 5 minutes then needs repeat

[Jammo]

Greetings,

I am experiencing up and download speeds that vary alot.  I pay for 110mbps  down / 10up.  At times it gets so slow that I can't load web pages.  When I do a speed test it shows between 4-6 down  and 6 up.  I reboot.  Speed now 60 / 11.  Repeat speed test several times.  Eventually it gets to 100ish / 10.  Everything works great.  Then within five minutes it's back to single digit download speeds.

I often get a mesage that I'm not connected to the internet even though the modem and router indicate that I am connected.  My phone won't update it's operating system anymore because "An internet connection is required". 

Another quirk I'm experiencing (which may be related, or not) is that while using my phone online and I get the "WIFI network doesn not appear to be connected to the Internet" message, I simply have to shut wifi off in my phone and then turn it back on and I'm good to go until it happens again a few minutes later.  When we have company over, they experience the same problems on thier devices.

Needless to say, streaming to the TV is a problem as well as my wife's Zoom meetings she does from home for her work.  Yesterday she was hosting a conference and lost her internet connection even though the modem and router said they were connected.

Rebooting isn't the solution as I'd have to do it a dozen or more times a day.

The modem was new this year, but these issues predate it.  It just seems much worse lately.

The router is a Netgear R6400

Any assistance is much appreciated. 

[Jammo · Accepted solution]

Looks like he fixed it.  Everything is working as it's supposed to. 

[plemans]

do you have a screen snip of the cable connections page and the event logs? 

Also, remove any splitter, amplifiers, or signal attenuators for the line. 

Check the line for kinks, damage, old/bad/corroded/cheap connectors and replace them if there are. 

I recommend moving the modem to right where the coax comes into the home to prevent wiring in the home from being the issue. 

[Jammo]

Hi plemans, Thanks for your reply.

Can't seem to upload that log.  Not sure what I'm doing wrong. 

The log entries all are critcal 3, Error 4, and Warning 5, Notice 6

These are the most common messages from the log:

**Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=94:a6:7e:c6:92:54;CMTS-MAC=00:17:10:91:70:07;CM-QOS=1.1;CM-VER=3.0;

**SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=94:a6:7e:c6:92:54;CMTS-MAC=00:17:10:91:70:07;CM-QOS=1.1;CM-VER=3.0;

**Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=94:a6:7e:c6:92:54;CMTS-MAC=00:17:10:91:70:07;CM-QOS=1.1;CM-VER=3.0;

**Resetting the cable modem due to docsDevResetNow

**Missing BP Configuration Setting TLV Type: 17.8;CM-MAC=94:a6:7e:c6:92:54;CMTS-MAC=00:17:10:91:70:07;CM-QOS=1.1;CM-VER=3.0;

**MDD message timeout;CM-MAC=94:a6:7e:c6:92:54;CMTS-MAC=00:17:10:91:70:07;CM-QOS=1.1;CM-VER=3.0;

Overriding MDD IP initialization parameters; IP provisioning mode = IPv6

2 of these entries are dated 01/01/1970...The others are all current dates

The cable company replaced all the cable and connections from the telephone pole to the modem.  When that didn't help I bought this modem several months ago hoping it would help.  There is a new splitter that I will bypass as a test.

The modem is 6 feet from where the cable enters the house. 

When I tried to send this post I got message saying that this site had removed invalid HTML.  Not sure what that is about.

[plemans]

You should be able to attach screen snips. get the cable connections page. 

the log is indicating line issues but it helps to have the cable connections page as well. 

[Jammo]

I get this message when I try to post either of the logs.

[Jammo]

Message cannot exceed 20,000 characters.

[plemans]

That's why I said take a screen snip. Make sure to get the cable connections page with snr/downstream/upstream/correctables. 

Use Snipping Tool to capture screenshots (microsoft.com)

[Jammo]

I will post it in pieces...

Frequency start Value

This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect.

Starting Frequency

Startup Procedure

Procedure	Status	Comment
Acquire Downstream Channel	591000000 Hz	Locked
Connectivity State	OK	Operational
Boot State	OK	Operational
Security	Enabled	BPI+
IP Provisioning Mode	IPv6 Only	ipv6Only(1)

[Jammo]

Sorry about this.  I use and send screen shoots all the time, but I can't make it work today.

11 Locked QAM256 27 651000000 Hz 10.9 dBmV 41.4 dB 348670 104361 12 Locked QAM256 28 657000000 Hz 10.7 dBmV 41.2 dB 11 0 13 Locked QAM256 29 663000000 Hz 10.6 dBmV 41 dB 0 0 14 Locked QAM256 30 669000000 Hz 10 dBmV 40.3 dB 0 0 15 Locked QAM256 31 675000000 Hz 9.8 dBmV 40.1 dB 0 0 16 Locked QAM256 32 681000000 Hz 9.6 dBmV 40.2 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 17600000 Hz 39.5 dBmV 2 Locked ATDMA 2 5120 Ksym/sec 24000000 Hz 39.5 dBmV 3 Locked ATDMA 3 5120 Ksym/sec 30400000 Hz 40.8 dBmV 4 Locked ATDMA 4 5120 Ksym/sec 36800000 Hz 41.5 dBmV

[plemans]

got channels 1-10? channel 11 has errors and your power levels are pretty high

[Jammo]

1	Locked	QAM256	17	591000000 Hz	6.6 dBmV	39.7 dB	0	0
2	Locked	QAM256	18	597000000 Hz	3.7 dBmV	37.5 dB	0	0
3	Locked	QAM256	19	603000000 Hz	-2.7 dBmV	30.9 dB	2938948	496739
4	Locked	QAM256	20	609000000 Hz	4 dBmV	34.7 dB	34146	1722
5	Locked	QAM256	21	615000000 Hz	9.1 dBmV	40 dB	70452	3212
6	Locked	QAM256	22	621000000 Hz	11 dBmV	42.4 dB	656259	20499
7	Locked	QAM256	23	627000000 Hz	11.3 dBmV	42 dB	182292	18319
8	Locked	QAM256	24	633000000 Hz	11.6 dBmV	42.1 dB	28482	61
9	Locked	QAM256	25	639000000 Hz	11.6 dBmV	41.9 dB	29217	19405
10	Locked	QAM256	26	645000000 Hz	11.1 dBmV	41.5 dB	46234	4963

[Jammo]

Thanks plemans,

Any thoughts on resolving these issues?  I will research further, but can you give me a ballpark for what power levels are acceptable and how I might change them?

[Jammo]

1	Locked	QAM256	17	591000000 Hz	6.6 dBmV	39.7 dB	0	0
2	Locked	QAM256	18	597000000 Hz	3.7 dBmV	37.5 dB	0	0
3	Locked	QAM256	19	603000000 Hz	-2.7 dBmV	30.9 dB	2938948	496739
4	Locked	QAM256	20	609000000 Hz	4 dBmV	34.7 dB	34146	1722
5	Locked	QAM256	21	615000000 Hz	9.1 dBmV	40 dB	70452	3212
6	Locked	QAM256	22	621000000 Hz	11 dBmV	42.4 dB	656259	20499
7	Locked	QAM256	23	627000000 Hz	11.3 dBmV	42 dB	182292	18319
8	Locked	QAM256	24	633000000 Hz	11.6 dBmV	42.1 dB	28482	61
9	Locked	QAM256	25	639000000 Hz	11.6 dBmV	41.9 dB	29217	19405
10	Locked	QAM256	26	645000000 Hz	11.1 dBmV	41.5 dB	46234	4963

[Jammo]

I had my ISP send a tech out.  He replaced the modem with a DOCSIS 3.1 and about 8 feet of old 5.9 coaxial cable from where it comes in the house to the modem.  The previous guy didn't do this...

Hopefully that's the end of it.

[plemans]

Hopefully!

[FURRYe38]

Any progress on this? 

---

@Jammo wrote:

I had my ISP send a tech out.  He replaced the modem with a DOCSIS 3.1 and about 8 feet of old 5.9 coaxial cable from where it comes in the house to the modem.  The previous guy didn't do this...

Hopefully that's the end of it.

---

[Jammo · Accepted solution]

Looks like he fixed it.  Everything is working as it's supposed to. 

[FURRYe38]

Good to hear. 

Enjoy.