Basic Internet Connectivity And Modem Help

[gbroadfoot]

I have blast performance internet (I THINK), the one with the tier of 20 Megs down. Have had it for a montha dn all has been well until today. Suddenly my download speeds are 4 to 6 megs, I have not called comcast yet - wanted to post here 1st. Below are the results of a speed test and the modem stats along with log file. Anyone see anything that looks amiss before I call comcast?

http://stage.results.speedtest.comcast.net/result/150754162.png

its an UBEE model that I rent from Comcast

Cable Modem Information Cable Modem : DOCSIS 1.0/1.1/2.0/3.0 Compliant MAC Address : 90:6E:BB:F99:B5 Serial Number : A552V45000361 Boot Code Version : 6.1.1c Software Version : 3.10.1309 Hardware Version : 1.47.3

CA Key : Installed

Cable Modem Status

Item Status CommentsAcquired Downstream Channel   699 MHz   Primary Downstream Locked Ranged Upstream Channel   22.0 MHz   Success Provisioning State   OK   Operational Ethernet Link Status   Up   100 Mbps/Full duplex

Cable Modem Downstream

  DS-1 DS-2 DS-3 DS-4 Frequency 699000000 729000000 735000000 741000000 Lock Status
(QAM Lock/FEC Sync/MPEG Lock) Y/Y/Y Y/Y/Y Y/Y/Y Y/Y/Y Channel Id 1 6 7 8 Modulation 256QAM 256QAM 256QAM 256QAM Symbol Rate
(Msym/sec) 5.360537 5.360537 5.360537 5.360537 Interleave Depth I=32
J=4 I=32
J=4 I=32
J=4 I=32
J=4 Power Level
(dBmV) -5.78 -6.93 -7.72 -7.97 RxMER
(d 35.60 35.60 35.42 35.60 Correctable
Codewords 23 98 52 154 Uncorrectable
Codewords 1365 1483 1437 1468

Cable Modem Upstream

  US-1 US-2 US-3 US-4 Channel Type 1.0 N/A 2.0 2.0 Channel ID 9 N/A 10 11 Frequency
(Hz) 22000000 N/A 29400000 36200000 Ranging Status Success N/A Success Success Modulation 16QAM N/A 64QAM 64QAM Symbol Rate
(KSym/sec) 2560 N/A 5120 5120 Mini-Slot Size 4 N/A 4 4 Power Level
(dBmV) 52.00 N/A 51.00 51.00 T1 Timeouts 0 0 0 0 T2 Timeouts 0 0 0 0 T3 Timeouts 0 0 0 0 T4 Timeouts 0 0 0 0

 Cable Modem Event Log

First Time Last Time Priority Description Wed Mar 21 03:18:13 2012 Wed Mar 21 03:18:13 2012 Warning (5) MIMO Event MIMO: Stored MIMO=1 post cfg file MIMO=-1;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:21:d8:d1:9c:3b;CM-QOS=1.1;CM-VER=3.0; Fri Mar 23 18:11:55 2012 Fri Apr 27 18:12:48 2012 Error (4) DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:21:d8:d1:9c:3b;CM-QOS=1.1;CM-VER=3.0; Sat Apr 28 17:29:10 2012 Sat Apr 28 17:29:10 2012 Warning (5) MIMO Event MIMO: Stored MIMO=1 post cfg file MIMO=-1;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:21:d8:d1:9c:3b;CM-QOS=1.1;CM-VER=3.0; Tue May 1 17:51:19 2012 Sat May 5 05:51:24 2012 Error (4) DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:21:d8:d1:9c:3b;CM-QOS=1.1;CM-VER=3.0; Time Not Established Time Not Established Warning (5) MDD message timeout;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:14:f1:df:4c:54;CM-QOS=1.1;CM-VER=3.0; Time Not Established Time Not Established Warning (5) Lost MDD Timeout;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:14:f1:df:4c:54;CM-QOS=1.1;CM-VER=3.0; Time Not Established Time Not Established Critical (3) No Ranging Response received - T3 time-out Tue May 22 23:36:50 2012 Tue May 22 23:36:50 2012 Warning (5) MIMO Event MIMO: Stored MIMO=1 post cfg file MIMO=-1;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:14:f1:df:4c:54;CM-QOS=1.1;CM-VER=3.0; Tue May 22 23:36:50 2012 Tue May 22 23:36:50 2012 Error (4) Improper Configuration File CVC Format;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:14:f1:df:4c:54;CM-QOS=1.1;CM-VER=3.0; Time Not Established Time Not Established Critical (3) No Ranging Response received - T3 time-out Mon Jun 18 18:08:13 2012 Mon Jun 18 18:43:48 2012 Warning (5) MIMO Event MIMO: Stored MIMO=1 post cfg file MIMO=-1;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:01:5c:3b:a0:46;CM-QOS=1.1;CM-VER=3.0; Wed Jun 20 00:36:18 2012 Wed Jun 20 00:36:18 2012 Critical (3) No Ranging Response received - T3 time-out Fri Jun 22 06:43:53 2012 Fri Jun 22 06:43:53 2012 Error (4) DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:01:5c:3b:a0:46;CM-QOS=1.1;CM-VER=3.0; Sun Jun 24 09:10:02 2012 Mon Jun 25 13:40:28 2012 Critical (3) No Ranging Response received - T3 time-out Mon Jun 25 18:43:58 2012 Mon Jun 25 18:43:58 2012 Error (4) DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:01:5c:3b:a0:46;CM-QOS=1.1;CM-VER=3.0; Wed Jun 27 05:43:10 2012 Wed Jun 27 11:23:55 2012 Critical (3) No Ranging Response received - T3 time-out Wed Jun 27 11:24:09 2012 Wed Jun 27 11:24:29 2012 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out Wed Jun 27 11:24:54 2012 Fri Jun 29 03:40:11 2012 Warning (5) MIMO Event MIMO: Stored MIMO=1 post cfg file MIMO=-1;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:01:5c:3b:a0:46;CM-QOS=1.1;CM-VER=3.0; Fri Jun 29 06:40:25 2012 Sat Jun 30 05:33:58 2012 Critical (3) No Ranging Response received - T3 time-out Sat Jun 30 08:57:36 2012 Sat Jun 30 08:57:36 2012 Warning (5) MIMO Event MIMO: Stored MIMO=1 post cfg file MIMO=-1;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:01:5c:3b:a0:46;CM-QOS=1.1;CM-VER=3.0; Sat Jun 30 08:57:36 2012 Sat Jun 30 08:57:36 2012 Critical (3) Registration RSP rejected message syntax error;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:01:5c:3b:a0:46;CM-QOS=1.1;CM-VER=3.0; Sat Jun 30 08:57:36 2012 Sat Jun 30 08:57:36 2012 Critical (3) Registration RSP rejected unspecified reason;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:01:5c:3b:a0:46;CM-QOS=1.1;CM-VER=3.0; Sat Jun 30 08:57:36 2012 Sat Jun 30 08:57:36 2012 Error (4) T6 Timeout and retries exceeded Sat Jun 30 08:57:36 2012 Sat Jun 30 08:57:36 2012 Critical (3) REG RSP not received;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:01:5c:3b:a0:46;CM-QOS=1.1;CM-VER=3.0; Sat Jun 30 08:57:52 2012 Sat Jun 30 08:57:52 2012 Warning (5) MIMO Event MIMO: Stored MIMO=1 post cfg file MIMO=-1;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:01:5c:3b:a0:46;CM-QOS=1.1;CM-VER=3.0; Sat Jun 30 09:30:41 2012 Sat Jun 30 09:30:41 2012 Critical (3) No Ranging Response received - T3 time-out Sat Jun 30 16:17:20 2012 Sat Jun 30 16:17:20 2012 Warning (5) MIMO Event MIMO: Stored MIMO=1 post cfg file MIMO=-1;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:01:5c:3b:a0:46;CM-QOS=1.1;CM-VER=3.0; Sat Jun 30 16:17:20 2012 Sat Jun 30 16:17:20 2012 Critical (3) Registration RSP rejected message syntax error;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:01:5c:3b:a0:46;CM-QOS=1.1;CM-VER=3.0; Sat Jun 30 16:17:20 2012 Sat Jun 30 16:17:20 2012 Critical (3) Registration RSP rejected unspecified reason;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:01:5c:3b:a0:46;CM-QOS=1.1;CM-VER=3.0; Sat Jun 30 16:17:20 2012 Sat Jun 30 16:17:20 2012 Error (4) T6 Timeout and retries exceeded Sat Jun 30 16:17:20 2012 Sat Jun 30 16:17:20 2012 Critical (3) REG RSP not received;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:01:5c:3b:a0:46;CM-QOS=1.1;CM-VER=3.0; Sat Jun 30 16:17:39 2012 Sat Jun 30 16:17:39 2012 Warning (5) MIMO Event MIMO: Stored MIMO=1 post cfg file MIMO=-1;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:01:5c:3b:a0:46;CM-QOS=1.1;CM-VER=3.0; Sat Jun 30 16:17:39 2012 Sat Jun 30 16:17:39 2012 Critical (3) Registration RSP rejected message syntax error;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:01:5c:3b:a0:46;CM-QOS=1.1;CM-VER=3.0; Sat Jun 30 16:17:39 2012 Sat Jun 30 16:17:39 2012 Critical (3) Registration RSP rejected unspecified reason;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:01:5c:3b:a0:46;CM-QOS=1.1;CM-VER=3.0; Sat Jun 30 16:17:40 2012 Sat Jun 30 16:17:40 2012 Error (4) T6 Timeout and retries exceeded Sat Jun 30 16:17:40 2012 Sat Jun 30 16:17:40 2012 Critical (3) REG RSP not received;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:01:5c:3b:a0:46;CM-QOS=1.1;CM-VER=3.0; Sat Jun 30 16:17:41 2012 Sat Jun 30 16:17:41 2012 Critical (3) No Ranging Response received - T3 time-out Sat Jun 30 16:17:55 2012 Sat Jun 30 16:18:56 2012 Warning (5) MIMO Event MIMO: Stored MIMO=1 post cfg file MIMO=-1;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:01:5c:3b:a0:46;CM-QOS=1.1;CM-VER=3.0; Sun Jul 1 04:49:45 2012 Mon Jul 2 07:12:14 2012 Critical (3) No Ranging Response received - T3 time-out Mon Jul 2 12:57:45 2012 Wed Jul 4 06:05:38 2012 Warning (5) MIMO Event MIMO: Stored MIMO=1 post cfg file MIMO=-1;CM-MAC=90:6e:bb:f9:d9:b5;CMTS-MAC=00:01:5c:3b:a0:46;CM-QOS=1.1;CM-VER=3.0;

[EG]

Are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured ?

If there aren't any uneeded 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 putting them back together again, then perhaps it's best to book a tech visit to investigate and correct.

[gbroadfoot]

1 splitter - cable enters the home goes into a splitter - 1 side to the TV other side to the cable modem. I checked all 3 connections and they are tight. Perhaps it is time to call comcast then.

[gbroadfoot]

Must have been something on Comcast's end - I have done nothing since my last post and suddenly my downloads are back up at 20 some megs.

[EG]

For curiosity, are the up and down power levels and the SNR the same as they were before ?

[gbroadfoot]

good question -

Cable Modem Downstream

  DS-1 DS-2 DS-3 DS-4 Frequency 699000000 729000000 735000000 741000000 Lock Status
(QAM Lock/FEC Sync/MPEG Lock) Y/Y/Y Y/Y/Y Y/Y/Y Y/Y/Y Channel Id 1 6 7 8 Modulation 256QAM 256QAM 256QAM 256QAM Symbol Rate
(Msym/sec) 5.360537 5.360537 5.360537 5.360537 Interleave Depth I=32
J=4 I=32
J=4 I=32
J=4 I=32
J=4 Power Level
(dBmV) -5.74 -6.95 -7.72 -7.97 RxMER
(d 35.60 35.60 35.42 35.60 Correctable
Codewords 23 98 53 154 Uncorrectable
Codewords 1365 1483

1437

Cable Modem Upstream

  US-1 US-2 US-3 US-4 Channel Type 1.0 N/A 2.0 2.0 Channel ID 9 N/A 10 11 Frequency
(Hz) 22000000 N/A 29400000 36200000 Ranging Status Success N/A Success Success Modulation 16QAM N/A 64QAM 64QAM Symbol Rate
(KSym/sec) 2560 N/A 5120 5120 Mini-Slot Size 4 N/A 4 4 Power Level
(dBmV) 52.00 N/A 51.00 51.00 T1 Timeouts 0 0 0 0 T2 Timeouts 0 0 0 0 T3 Timeouts 0 0 0 0 T4 Timeouts 0 0 0 0

1468

[EG]

Pretty much. It may possibly be a transient capacity / congestion issue on your segment.

[Shad0wembrace]

I had the same issues with a Ubee modem.  Sometimes the download speeds would b e fine and other times slow.  The Comcast g uy told me it was my modem, so I took it back and got a brand new one (Cisco this time), and am having the same issues.  So I'm thinking this is something on Comcast's end.

[NOVAChris]

I have an Moto SB 6121 and the same broadband tier (Performance, 20Mbps down) and as of ~ 7/1/12 I've been having the same problem with crawling internet speeds.  Powercycling will bring speed up to approx 18-20Mbps for a brief period of time and then it tests out to between .6 to 4.

After dealing with it for a week, I chatted with a Comcast tech and the signal status was fine.

She said, however, my account was not "set up" properly, and she fixed it.  My last instruction was to power cycle everything and it should be fine.

It is not fine.  The situation remains as it was.

[bemerick]

Ever since I got back into town on Sunday, I've been unable to play Diablo III due to latency.  I thought it was D3 servers but doing a speed test on Speedtest.net shows my Comcast speeds are abyssmal.  Spikes to 20 and then drops to 4 or 5, and then spikes again, and back down.  Then half my upload speed I should have.

http://www.speedtest.net/result/2056570433.png

I live in Chicago, Andersonville area.

http://stage.results.speedtest.comcast.net/result/152283502.png