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Ianpee
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M350 running at >90Mbps for over a week

My wired connection has gone from reliable 350+ to less than 90Mbps. Been like this for >1 week. Tests / status all report good (and yes I have rebooted both PCs and the Hub3 multiple times). Network card still reporting 1Gb speed.

Upload still operating at 30+ though

Anyone else having problems (Brighton area)?

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mick15
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Re: M350 running at >90Mbps for over a week

Similar in that my speed tests have been up and down like a fiddler's elbow over the last four days since upgrading to M350 on 14/6/2020. I suspect my issue might be cabling though.

All my tests are ookla seedtest.net results and for a wired desktop.

M350 upgrade is 4 days old but download speeds have varied between initial 225.69mpbs (15/6/60 at 11.50pm) to min of 59.97mpbs (18/6/20 at 16.01pm) and are most recently at 231.99mpbs (18/6/2020 at 22.19pm).

Upload has shown consistent 36.7 to 36.9 Mbps.

Ping also fairly consistently 8 to 10 ms except for repeated results (3) at 25, 26 and 28ms on 18/6/20 between 15.49 and 15.54pm when download was between 76 and 80 Mpbs. 

I have rebooted router, reset router and checked cabling, also changing over ethernet cables.

What I do see in the network log are recurrent critical 'No ranging response' T3 timeout warnings and recurrent DHCP renewal errors.

I believe these are usually indicative of cabling issues but I have replaced ethernet cables from modem to PC. Anyone able to advise if my suspicions are likely to be wrong any other tests to try or will need engineers visit?

 

 

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gary_dexter
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Re: M350 running at >90Mbps for over a week

Post the network, upstream and downstream logs from the hub admin pages 


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Ianpee
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Re: M350 running at >90Mbps for over a week

Hi Alessandro,thanks for your reply. Is this info helpful?

Time Priority Description

19/06/2020 07:17:47noticeLAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
19/06/2020 07:17:40Warning!LAN login FAILED : Incorrect Username / Password / ConnectionType;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
19/06/2020 05:55:5ErrorDHCP RENEW sent - No response for IPv4;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
19/06/2020 01:22:49criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

 

Downstream bonded channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID

1298750000038256 qam21
21867500000.238256 qam7
31947500000.238256 qam8
42027500000.238256 qam9
52107500000.238256 qam10
62187500000.238256 qam11
7226750000038256 qam12
8234750000-0.238256 qam13
9242750000-0.238256 qam14
10250750000038256 qam15
11258750000038256 qam16
12266750000-0.238256 qam17
13274750000-0.438256 qam18
14282750000-0.238256 qam19
15290750000-0.438256 qam20
16306750000038256 qam22
173147500000.238256 qam23
18322750000038256 qam24
194027500000.238256 qam25
204107500000.238256 qam26
214187500000.439256 qam27
224267500000.240256 qam28
234347500000.238256 qam29
24442750000040256 qam30



Downstream bonded channels

Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors

1Locked38.94551932778
2Locked38.951014470
3Locked38.950824153
4Locked38.650823667
5Locked38.946593882
6Locked38.650789261
7Locked38.646675776
8Locked38.953174542
9Locked38.955254581
10Locked38.957006287
11Locked38.952074467
12Locked38.952704851
13Locked38.956553617
14Locked38.953304616
15Locked38.967343747
16Locked38.9258295400
17Locked38.952004719
18Locked38.948293619
19Locked38.6182558351494
20Locked38.9109374009
21Locked39.842117422
22Locked40.3214025510
23Locked38.9184923734022
24Locked40.31610454285345

 

Upstream bonded channels

Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID

1537000005.1512064 qam1
2325999494.925512064 qam4
3394000275.05512064 qam3
4462000305.1512064 qam2



Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1ATDMA0000
2ATDMA0000
3ATDMA0000
4ATDMA0000

 

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Ianpee
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Message 5 of 19
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Re: M350 running at >90Mbps for over a week

Hi Mick,

Thanks for the reply.

Mine isn't a new installation, and I upgraded to M350 months ago. Until now it has been completely reliable and always measures >350Mbps (Ookla Win10 Speedtest app). There is very little variation in the speed now, it is consistently around 85-90. My error messages are the same as yours though.

I don't think it can be my cabling because two PC connected via 1Gb switch and one directly plugged in the hub all show the same issue.

I will probably have to call for an engineer.

 

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Message 6 of 19
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Re: M350 running at >90Mbps for over a week


@Ianpee wrote:

Hi Mick,

Thanks for the reply.

Mine isn't a new installation, and I upgraded to M350 months ago. Until now it has been completely reliable and always measures >350Mbps (Ookla Win10 Speedtest app). There is very little variation in the speed now, it is consistently around 85-90. My error messages are the same as yours though.

I don't think it can be my cabling because two PC connected via 1Gb switch and one directly plugged in the hub all show the same issue.

I will probably have to call for an engineer.

 


check all coax connections are tight - lost of pre and post rs errors - do a reboot to zero them and post back results in a few hours - upstream is too high imo but VM may say its ok

90 is typical of a cable fault - how are things connected - how do you connect to the switch - that could be faulty

remove the switch and all wiring other than one pc direct to the hub and see what speed that gives - if its still slow repeat the test with the hub in modem mode

____________________

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Ianpee
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Message 7 of 19
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Re: M350 running at >90Mbps for over a week

Hi Tony, thank you for your advice.

I checked the coax inside and outside the house. All was clean and tight.

After re-booting the hub, I tested again with just the direct PC plugged in, but no improvement.

I couldn't get a connection to the PC from any port in Modem Mode (red status LED), so had to reset the hub to defaults to recover. I don't have a separate router.

20/06/2020 10:28:7noticeLAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2020 09:17:14noticeUnit has been restored to factory defaults from a software issued command;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
20/06/2020 08:59:55noticeLAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/01/1970 00:01:31criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

 

Downstream bonded channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID

1402750000038256 qam25
21867500000.438256 qam7
31947500000.538256 qam8
42027500000.538256 qam9
52107500000.538256 qam10
62187500000.438256 qam11
7226750000038256 qam12
8234750000038256 qam13
9242750000038256 qam14
10250750000038256 qam15
11258750000038256 qam16
12266750000-0.238256 qam17
13274750000-0.238256 qam18
14282750000-0.238256 qam19
15290750000-0.238256 qam20
16298750000038256 qam21
173067500000.238256 qam22
183147500000.238256 qam23
19322750000038256 qam24
204107500000.238256 qam26
214187500000.238256 qam27
224267500000.238256 qam28
23434750000038256 qam29
24442750000040256 qam30



Downstream bonded channels

Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors

1Locked38.900
2Locked38.9170
3Locked38.9100
4Locked38.680
5Locked38.660
6Locked38.990
7Locked38.990
8Locked38.980
9Locked38.670
10Locked38.990
11Locked38.940
12Locked38.960
13Locked38.950
14Locked38.980
15Locked38.960
16Locked38.980
17Locked38.960
18Locked38.6180
19Locked38.950
20Locked38.9110
21Locked38.950
22Locked38.960
23Locked38.640
24Locked38.960

 

Upstream bonded channels

Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID

1326000004.95512064 qam4
2537000005.1512064 qam1
3394000205.05512064 qam3
4462000005.1512064 qam2



Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1ATDMA0000
2ATDMA0000
3ATDMA0000
4ATDMA0000

 

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Re: M350 running at >90Mbps for over a week

Hello

Two of your upstream power levels are at the MAX allowed and this is what is causing the issues, as you have checked the coaxial connections then an engineer is going to be needed to resolve.

Regards Mike

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Re: M350 running at >90Mbps for over a week


@DJ_Shadow1966 wrote:

Hello

Two of your upstream power levels are at the MAX allowed and this is what is causing the issues, as you have checked the coaxial connections then an engineer is going to be needed to resolve.

Regards Mike


3 things - the new stats show a dramatic reduction in the pre and post rs errors are the figures still the same or are they increasing

only the lan port next to the coax works in modem mode - can you check again and run a speed test if you can get a connection - if you have your own router then are you using that - if so the hub should already be in modem mode - red [magenta] light is correct for modem mode

the upstream at 5.1 [51] i would not take issue that these are at the max although VM might - they now seem to accept 5.2 [52] as ok - whichever is correct i am not sure thats reducing you download speed to 90 

____________________

Tony
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Message 10 of 19
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Re: M350 running at >90Mbps for over a week

90mb sounds suspicious, that's almost always a fault with your ethernet/own setup