Cable Forum - New 50 meg install goes slow every 5am

Hi,

We moved house over xmas and are finally back in a cabled area. :D I jumped at the chance to move from ADSL2+ (22 meg sync) over to 50 meg cable, and haven't regretted it yet!

The install team were excellent, friendly and highly professional. I've got a rock solid 6.x MB/sec connection and couldn't be happier! However, I do have a question that may be a little strange, but I'm curious now!

I have health problems and usually find myself up at strange hours unable to sleep. I've noticed that my download speed, which is generally 6.x MB/sec rock solid (meaning my connection graph looks like this: /------------\) goes, well, 'weird' at around 5am every morning.

Speeds become incredibly erratic, jumping between 1.5MB/sec and 3.5MB/sec but never able to reach normal speeds. The connection (downstream throughput) graph on my client then looks like this: /-\/\/-\/\/\/\.

It lasts about 10 minutes, and then jumps back to 6.x MB/sec for the rest of the day. Nothing to complain about, I know! But I really am just curious. I've tried several usenet NSPs (providers) during this 'funny' period, and although their speeds are different from each other during this time, they're all well below par. FTP is also affected, so it's definitely not an NSP issue.

Maybe something being rebooted on the WAN-side? Another type of scheduled WAN-side network event? It's a bit coincidental that it happens at around 5am-ish (I haven't checked the exact time) every morning, and there's nothing scheduled on my PC for then.

Anyway I just wondered if anyone could shed any light on the matter? I did notice some entries in the modem log, but these didn't happen during any other of the "5am dips" this week. About the only thing that did jump out at me in the stats (and I know very little about cable, having been an ADSL2+er for years) was that the uncorrectable errors on the downstream are way, way higher on channels 2 and 3 compared with the low entries for channels 1 and 4. That could be normal though. :p:

Here's my stats just in case. I'm on the Newton-le-Willows network/UBR btw, and as I said I'm over the moon with my connection so this is definitely not a complaint. :) I hope the following isn't TMI, I just wanted to make sure I didn't leave you helpful folks waiting around for me to answer YOUR questions when it's me bugging you for help to begin with!

Thanks in advance for any input, this seems a great forum so I'll be sticking around.

https://www.cableforum.co.uk/images/...2010/01/31.png
http://www.pingtest.net/result/7983742.png

Code:

21:43:35 2010         Fri Jan 22 12:39:31 2010         Critical (3)         No Ranging Response received - T3 time-out;CM-MAC=00:22:68:f1:06:b8;CMTS-MAC=00:30:b8:d1:e9:c0;CM-QOS=1.1;CM-VER=3.0;

Fri Jan 22 12:39:33 2010         Sun Jan 24 19:57:52 2010         Warning (5)         TEK Invalid - Invalid Key Sequence Number;CM-MAC=00:22:68:f1:06:b8;CMTS-MAC=00:30:b8:d1:e9:c0;CM-QOS=1.1;CM-VER=3.0;

Mon Jan 25 00:55:10 2010         Mon Jan 25 04:09:37 2010         Critical (3)         No Ranging Response received - T3 time-out;CM-MAC=00:22:68:f1:06:b8;CMTS-MAC=00:30:b8:d1:e9:c0;CM-QOS=1.1;CM-VER=3.0;

Mon Jan 25 04:09:39 2010         Mon Jan 25 04:09:39 2010         Critical (3)         Ranging Request Retries exausted;CM-MAC=00:22:68:f1:06:b8;CMTS-MAC=00:30:b8:d1:e9:c0;CM-QOS=1.1;CM-VER=3.0;

Mon Jan 25 04:09:39 2010         Mon Jan 25 04:09:39 2010         Critical (3)         Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=00:22:68:f1:06:b8;CMTS-MAC=00:30:b8:d1:e9:c0;CM-QOS=1.1;CM-VER=3.0;

Mon Jan 25 04:47:42 2010         Mon Jan 25 04:47:42 2010         Critical (3)         No Ranging Response received - T3 time-out;CM-MAC=00:22:68:f1:06:b8;CMTS-MAC=00:30:b8:d1:e9:c0;CM-QOS=1.1;CM-VER=3.0;

Code:

Cable Modem Downstream

        DS-1        DS-2        DS-3        DS-4

Frequency         299000000        307000000        315000000        323000000

Lock Status

(QAM Lock/FEC Sync/MPEG Lock)         Y/Y/Y        Y/Y/Y        Y/Y/Y        Y/Y/Y

Channel Id         57        58        59        60

Modulation         256QAM        256QAM        256QAM        256QAM

Symbol Rate

(Msym/sec)         6.952        6.952        6.952        6.952

Interleave Depth         I=12

J=17        I=12

J=17        I=12

J=17        I=12

J=17

Power Level

(dBmV)         3.24        3.52        3.85        4.70

RxMER

(dB)         37.94        38.61        38.61        38.61

Correctable

Codewords         0        0        0        0

Uncorrectable

Codewords         340        902        999        280

Code:

Cable Modem Upstream

        US-1        US-2        US-3        US-4

Channel Type         1.0        N/A        N/A        N/A

Channel ID         1        N/A        N/A        N/A

Frequency

(Hz)         37500000        N/A        N/A        N/A

Ranging Status         Success        N/A        N/A        N/A

Modulation         16QAM        N/A        N/A        N/A

Symbol Rate

(KSym/sec)         2560        N/A        N/A        N/A

Mini-Slot Size         2        N/A        N/A        N/A

Power Level

(dBmV)         43.00        N/A        N/A        N/A

T1 Timeouts        0

T2 Timeouts        0        0        0        0

T3 Timeouts        0        0        0        0

T4 Timeouts        0        0        0        0

Code:

Cable Modem Operation Configuration

General Configuration

Network Access :         Allowed

Maximum Number of CPEs :         1

Baseline Privacy :         Enabled

DOCSIS Mode :         DOCSIS 3.0

Config File :         O69a1cd95452f1c3c.cm

Primary Downstream Service Flow

SFID :         15470

Max Traffic Rate :         53000000 bps

Max Traffic Burst :         10000 bytes

Min Traffic Rate :         0 bps

Primary Upstream Service Flow

SFID :         15469

Max Traffic Rate :         1750000 bps

Max Traffic Burst :         3044 bytes

Min Traffic Rate :         0 bps

Max Concatenated Burst :         0 bytes

Scheduling Type :         Best Effort