Community Forum

Serious Internet Issues

wolves94
Regular Visitor

Serious Internet Issues

Background below.

 

I had Comcast come out 3 times to check my line. They even ran a new line to my house. However my WIFI and Ethernet both disconnect constantly. Equipment is below

 

Setup

ARRIS SURFboard SB6190 DOCSIS 3.0 Cable Modem

D-Link DIR-3060

 

A Few Error Logs From Router (These repeat daily and almost hourly) 

 

2020-09-04 21:27:50 syslog: dnssd_clientstub ConnectToServer: connect() failed path:/var/run/mdnsd Socket:27 Err:-1 Errno:0 Success
2020-09-04 21:27:50 syslog: dnssd_clientstub DNSServiceRefDeallocate called with NULL DNSServiceRef
2020-09-04 21:27:53 syslog: dnssd_clientstub ConnectToServer: connect()-> No of tries: 1
2020-09-04 21:27:54 syslog: dnssd_clientstub ConnectToServer: connect()-> No of tries: 2
2020-09-04 21:27:55 syslog: dnssd_clientstub ConnectToServer: connect()-> No of tries: 3

Snapchat of Logs from Modem

Wed Sep 02 21:00:28 20205RCS Partial Service;CM-MAC=14:c0:3e:c4:91:43;CMTS-MAC=00:01:5c:62:e4:59;CM-QOS=1.1;CM-VER=3.0;
Wed Sep 02 21:00:28 20203SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=14:c0:3e:c4:91:43;CMTS-MAC=00:01:5c:62:e4:59;CM-QOS=1.1;CM-VER=3.0;
Wed Sep 02 21:00:28 20205RCS Partial Service;CM-MAC=14:c0:3e:c4:91:43;CMTS-MAC=00:01:5c:62:e4:59;CM-QOS=1.1;CM-VER=3.0;
Wed Sep 02 21:00:34 20205Lost MDD Timeout;CM-MAC=14:c0:3e:c4:91:43;CMTS-MAC=00:01:5c:62:e4:59;CM-QOS=1.1;CM-VER=3.0;
Wed Sep 02 21:03:41 20206TLV-11 - unrecognized OID;CM-MAC=14:c0:3e:c4:91:43;CMTS-MAC=00:01:5c:62:e4:59;CM-QOS=1.1;CM-VER=3.0;
Wed Sep 02 21:17:13 20205RCS Partial Service;CM-MAC=14:c0:3e:c4:91:43;CMTS-MAC=00:01:5c:62:e4:59;CM-QOS=1.1;CM-VER=3.0;
Thu Sep 03 16:43:10 20203No Ranging Response received - T3 time-out;CM-MAC=14:c0:3e:c4:91:43;CMTS-MAC=00:01:5c:62:e4:59;CM-QOS=1.1;CM-VER=3.0;
Thu Sep 03 16:55:02 20205RCS Partial Service;CM-MAC=14:c0:3e:c4:91:43;CMTS-MAC=00:01:5c:62:e4:59;CM-QOS=1.1;CM-VER=3.0;
Fri Sep 04 11:05:13 20203No Ranging Response received - T3 time-out;CM-MAC=14:c0:3e:c4:91:43;CMTS-MAC=00:01:5c:62:e4:59;CM-QOS=1.1;CM-VER=3.0;
Fri Sep 04 11:10:24 20205RCS Partial Service;CM-MAC=14:c0:3e:c4:91:43;CMTS-MAC=00:01:5c:62:e4:59;CM-QOS=1.1;CM-VER=3.0;

 

This has been an ongoing for over a year now and I am lost for answers. Can someone please help point me in the right direction? I have done all the troubleshooting and equipment swap that I can in order to help my connectin stay steady throughout the day. Alas it isn't. Can please someone assist? 

 

Thanks

wolves94
Regular Visitor

Re: Serious Internet Issues

Modem info below.

 

ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA15120 kSym/s35.60 MHz49.00 dBmV
2LockedATDMA45120 kSym/s16.40 MHz48.00 dBmV
3LockedATDMA35120 kSym/s22.80 MHz48.00 dBmV
4LockedATDMA25120 kSym/s29.20 MHz48.00 dBmV
5LockedATDMA51280 kSym/s39.60 MHz46.50 dBmV

 

 

EG
Expert

Re: Serious Internet Issues

The upstream power is on the high side and it may be intermittently fluctuating even higher to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.

In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.



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wolves94
Regular Visitor

Re: Serious Internet Issues

ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA15120 kSym/s35.60 MHz48.00 dBmV
2LockedATDMA45120 kSym/s16.40 MHz48.50 dBmV
3LockedATDMA35120 kSym/s22.80 MHz47.50 dBmV
4LockedATDMA25120 kSym/s29.20 MHz47.75 dBmV
5LockedATDMA51280 kSym/s39.60 MHz46.00 dBmV

 

Still too high? 

EG
Expert

Re: Serious Internet Issues

So, it's a tad better. What was done ? Do you still have the problem ?



I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!
wolves94
Regular Visitor

Re: Serious Internet Issues

Still an issue. Constant disconnects. 

 

EG
Expert

Re: Serious Internet Issues

What was done ?



I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!
wolves94
Regular Visitor

Re: Serious Internet Issues

Splitter was replaced. 

 

Ethernet lines were changed out and coax was swapped. 

wolves94
Regular Visitor

Re: Serious Internet Issues

Can a comcast agent please respond. This is going on for 3 years

 

https://i.ibb.co/9qhk0s8/Screenshot-1.jpg