Observer

Upload speed is extremely slow

My modem/router is a DG1670. I ran a speed test connected directly through ethernet and while the download speed was over 300 Mbps,  the upload speed was a miserable 360 kbps. 

Been having some problems with spontaneous modem reboots recently as well as many corrected and uncorrected errors and an incomplete event log. (Sometimes reboots don't even register in the log.)  Unfortunately I forcibly rebooted the router a half hour ago so not much information available yet.    

 

Any insight would be greatly appreciated.

 

RF Parameters

Downstream 

 DCIDFreqPowerSNRModulationOctetsCorrectedsUncorrectables
Downstream 12525.00 MHz2.00 dBmV38.61 dB256QAM2403265240
Downstream 23531.00 MHz2.20 dBmV40.37 dB256QAM11486817150
Downstream 34537.00 MHz1.90 dBmV40.37 dB256QAM11451999150
Downstream 45543.00 MHz1.90 dBmV40.37 dB256QAM1020805280
Downstream 56549.00 MHz1.90 dBmV40.37 dB256QAM1152889300
Downstream 67555.00 MHz2.10 dBmV38.98 dB256QAM1173546100
Downstream 78561.00 MHz2.20 dBmV40.37 dB256QAM895945200
Downstream 89567.00 MHz2.50 dBmV38.98 dB256QAM1018170400
Downstream 910573.00 MHz2.70 dBmV38.98 dB256QAM11832011160
Downstream 1016609.00 MHz3.20 dBmV40.37 dB256QAM10491673140
Downstream 1119627.00 MHz1.90 dBmV38.98 dB256QAM823325500
Downstream 1224657.00 MHz1.50 dBmV38.98 dB256QAM755288400
Downstream 1326669.00 MHz1.20 dBmV38.61 dB256QAM783082000
Downstream 1427675.00 MHz1.60 dBmV38.98 dB256QAM970571900
Downstream 1528681.00 MHz1.10 dBmV38.98 dB256QAM801190000
Downstream 1632705.00 MHz1.30 dBmV38.61 dB256QAM973420400
Reset FEC Counters

Upstream 

 UCIDFreqPowerChannel TypeSymbol RateModulation
Upstream 13637.00 MHz50.00 dBmVDOCSIS2.0 (ATDMA)5120 kSym/s64QAM
Upstream 23530.60 MHz49.50 dBmVDOCSIS2.0 (ATDMA)5120 kSym/s64QAM
Upstream 33424.20 MHz49.00 dBmVDOCSIS2.0 (ATDMA)5120 kSym/s64QAM
Upstream 43317.80 MHz47.50 dBmVDOCSIS2.0 (ATDMA)5120 kSym/s64QAM

 

 Status
System Uptime: 0 d: 0 h: 25 m
Computers Detected:staticCPE(1), dynamicCPE(2)
CM Status:OPERATIONAL
Time and Date:Sun 2018-11-04 02:18:08

 

 Interface Parameters 
Interface NameProvisionedStateSpeed (Mbps)MAC address
LAN Port 1EnabledUp1000(Full)AC:B3:13:82:90:71
LAN Port 2EnabledDown-----AC:B3:13:82:90:71
LAN Port 3EnabledDown-----AC:B3:13:82:90:71
LAN Port 4EnabledDown-----AC:B3:13:82:90:71
CABLEEnabledUp-----AC:B3:13:82:90:72

 

DOCSIS(CM) Events 

 

Date TimeEvent IDEvent LevelDescription
10/15/2018 23:28840007005RCS Partial Service;CM-MAC=ac:b3:13:82:90:72;CMTS-MAC=00:01:5c:6a:50:56;CM-QOS=1.1;CM-VER=3.0;
10/15/2018 23:28840005003SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=ac:b3:13:82:90:72;CMTS-MAC=00:01:5c:6a:50:56;CM-QOS=1.1;CM-VER=3.0;
10/15/2018 23:28840202005Lost MDD Timeout;CM-MAC=ac:b3:13:82:90:72;CMTS-MAC=00:01:5c:6a:50:56;CM-QOS=1.1;CM-VER=3.0;
10/15/2018 23:28820004003Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=ac:b3:13:82:90:72;CMTS-MAC=00:01:5c:6a:50:56;CM-QOS=1.1;CM-VER=3.0;
10/15/2018 23:30820002003No Ranging Response received - T3 time-out;CM-MAC=ac:b3:13:82:90:72;CMTS-MAC=00:01:5c:6a:50:56;CM-QOS=1.1;CM-VER=3.0;
10/15/2018 23:32820009005B-INIT-RNG Failure - Retries exceeded;CM-MAC=ac:b3:13:82:90:72;CMTS-MAC=00:01:5c:6a:50:56;CM-QOS=1.1;CM-VER=3.0;
10/15/2018 23:32820002003No Ranging Response received - T3 time-out;CM-MAC=ac:b3:13:82:90:72;CMTS-MAC=00:01:5c:6a:50:56;CM-QOS=1.1;CM-VER=3.0;
10/15/2018 23:33820009005B-INIT-RNG Failure - Retries exceeded;CM-MAC=ac:b3:13:82:90:72;CMTS-MAC=00:01:5c:6a:50:56;CM-QOS=1.1;CM-VER=3.0;
10/15/2018 23:33820002003No Ranging Response received - T3 time-out;CM-MAC=ac:b3:13:82:90:72;CMTS-MAC=00:01:5c:6a:50:56;CM-QOS=1.1;CM-VER=3.0;
10/15/2018 23:35820009005B-INIT-RNG Failure - Retries exceeded;CM-MAC=ac:b3:13:82:90:72;CMTS-MAC=00:01:5c:6a:50:56;CM-QOS=1.1;CM-VER=3.0;
10/15/2018 23:35820002003No Ranging Response received - T3 time-out;CM-MAC=ac:b3:13:82:90:72;CMTS-MAC=00:01:5c:6a:50:56;CM-QOS=1.1;CM-VER=3.0;
10/19/2018 4:16840007005RCS Partial Service;CM-MAC=ac:b3:13:82:90:72;CMTS-MAC=00:01:5c:6a:50:56;CM-QOS=1.1;CM-VER=3.0;
10/20/2018 19:54820005003Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=ac:b3:13:82:90:72;CMTS-MAC=00:01:5c:6a:50:56;CM-QOS=1.1;CM-VER=3.0;
10/20/2018 19:54670701004DBC-ACK not received;CM-MAC=ac:b3:13:82:90:72;CMTS-MAC=00:01:5c:6a:50:56;CM-QOS=1.1;CM-VER=3.0;
10/20/2018 19:54820005003Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=ac:b3:13:82:90:72;CMTS-MAC=00:01:5c:6a:50:56;CM-QOS=1.1;CM-VER=3.0;
10/20/2018 19:55820004003Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=ac:b3:13:82:90:72;CMTS-MAC=00:01:5c:6a:50:56;CM-QOS=1.1;CM-VER=3.0;
10/22/2018 3:05820002003No Ranging Response received - T3 time-out;CM-MAC=ac:b3:13:82:90:72;CMTS-MAC=00:01:5c:6a:50:56;CM-QOS=1.1;CM-VER=3.0;
10/27/2018 16:54820004003Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=ac:b3:13:82:90:72;CMTS-MAC=00:01:5c:6a:50:56;CM-QOS=1.1;CM-VER=3.0;
10/27/2018 17:49820002003No Ranging Response received - T3 time-out;CM-MAC=ac:b3:13:82:90:72;CMTS-MAC=00:01:5c:6a:50:56;CM-QOS=1.1;CM-VER=3.0;
1/1/1970 0:01680004015ToD request sent - No Response received;CM-MAC=ac:b3:13:82:90:72;CMTS-MAC=00:01:5c:6a:50:56;CM-QOS=1.1;CM-VER=3.0;
3 REPLIES
Proven Sharer

Re: Upload speed is extremely slow

Three of the four upstream data channels (which carry the upload signal packets) are almost at their maximum signal limit, because of high upstream cable loss.  This usually indicates that some water has entered your drop cable or the trunk line.  In a few cases customers have added a new splitter to extend or reroute the cable within their dwelling space and the added loss of the splitter creates the problem. 

 

1)  If you've recently changed any indoor cabling, go back with a 7/16" wrench and make sure all connections are tight,  If you do this and uploads don't return to normal, keep reading.

 

2)  If your drop cable runs near or through tree branches, or if you have aggressive squirrels in your neighborhood, the outer insulation may have been rubbed away, allowing water to enter the cable.  Spectrum would need to replace the moisture-filled cable, whether it is the drop itself or, in some cases, a length of their distribution trunk cable.  You'll have to call to schedule a home tech visit for that part. 

Observer

Re: Upload speed is extremely slow

Thanks.  I haven't added any splitters but I did remove a television from one room but left the coax plugged into the box. Could the unterminated out on the set-top box possibly be a source of ingress?

 

Could moisture in the drop cable or trunk line also explain the downstream errors, spontaneous modem reboots and T3/T4 time outs?

 

Thanks for you help.

Helper

Re: Upload speed is extremely slow


@mishmish wrote:

Thanks.  I haven't added any splitters but I did remove a television from one room but left the coax plugged into the box. Could the unterminated out on the set-top box possibly be a source of ingress?

 

Could moisture in the drop cable or trunk line also explain the downstream errors, spontaneous modem reboots and T3/T4 time outs?

 

Thanks for you help.


Both are possible but I think moisture or damaged coax is the most likely culprit.