Hi,
We moved house over xmas and are finally back in a cabled area.
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.
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.
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
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