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nigelx
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Download speed consistently stuck at 90 on a connection that should be 300

Good afternoon all.

My M350 connection has started to exhibit slow speeds. All speeds have been tested using Speedtest using a direct-wired ethernet connection.

Immediately following a reboot of the hub, I achieve speeds in line with my expectations - around 280 Down and 35 up.  After a short period of time though, the Down speed falls to a very consistent 90, with the up speeds unaffected.  The network log contains no events or errors of note and the upstream and downstream readings appear (to me at least) unremarkable.  I would appreciate any thoughts.

Downstream bonded channels

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

12190000005.140256 qam11
2203000000640256 qam9
32110000005.640256 qam10
42270000004.640256 qam12
5235000000440256 qam13
62430000004.140256 qam14
72510000004.440256 qam15
82590000004.640256 qam16
92670000004.540256 qam17
102750000004.540256 qam18
112830000004.540256 qam19
122910000004.840256 qam20
132990000004.840256 qam21
14307000000540256 qam22
153150000004.640256 qam23
163230000004.340256 qam24
173310000004.140256 qam25
183390000003.940256 qam26
19347000000440256 qam27
203550000003.740256 qam28
213630000003.940256 qam29
223710000003.740256 qam30
233790000003.740256 qam31
243870000003.440256 qam32



Downstream bonded channels

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

1Locked40.3310
2Locked40.3510
3Locked40.3410
4Locked40.3270
5Locked40.3410
6Locked40.9320
7Locked40.3400
8Locked40.3370
9Locked40.3290
10Locked40.3650
11Locked40.9310
12Locked40.9350
13Locked40.9340
14Locked40.9390
15Locked40.3330
16Locked40.9320
17Locked40.3420
18Locked40.9490
19Locked40.3470
20Locked40.9400
21Locked40.9540
22Locked40.9250
23Locked40.9320
24Locked40.3200

 

Upstream bonded channels

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

15370007341.3512064 qam2
23260000041.8512064 qam5
33940000039.8512064 qam4
44620000040.3512064 qam3



Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1ATDMA0030
2ATDMA0030
3ATDMA0010
4ATDMA0020

 

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jbrennand
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Re: Download speed consistently stuck at 90 on a connection that should be 300

Post up the network logs too and start a BQM as below.

Have you tried a new Cat6 ethernet cable (old ones do fail)?
---------------------

If you haven’t already, set up a free and secure “Broadband Quality Monitor” to continually monitor the state of your connection and record any true network dropouts , latency issues, packet drops, etc - it will thus allow you to differentiate between those and simple wifi dropouts. It does it 24/7/365 and it keeps a visual record of any/all of your network disconnections, useful data to have to match to the Network logs (in your Hub settings) and also in discussions with VM - note it will take a few hours to start seeing a sensible picture - post up the “link” to the “share live graph” (as per instructions on the TB website) when it starts to develop.

https://www.thinkbroadband.com/broadband/monitoring/quality

--------------------
John
--------------------

I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router +2 Airport Express's. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.
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sophist
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Re: Download speed consistently stuck at 90 on a connection that should be 300

a speed of 90mb is usually indicative of a faulty cable  - it's possible that on reboot (of the hub) the device connected negotiates a speed of 1000mb but that over time it is unable to sustain this so drops back to 100mb.. which translates to the 90mb you're seeing.

try a different cable and see if that fixes it.

you should be able to see what speed your device thinks the connection is in the network status/properties somewhere (depending on device/operating system etc..)

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nigelx
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Re: Download speed consistently stuck at 90 on a connection that should be 300

Thanks Sophist. I have swapped the cable (between the hub and my switch) and restarted. So far so good. I will report back with results.