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ricisbest
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Poor upload speed on M350

H! I'm on M350, but during the day, the upload speeds are pretty pitiful (less than 5Mbps). At quiet times i see up to the advertised 35mbps eg. late in the evening.

I'm guessing that this is because in lockdown people are using the service in my area more during the day, but I wanted to rule out any issue with my connection. Anyone got any insight?  Some details from my Virgin modem follow...

Upstream bonded channels

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

16030000045.3512064 qam1
23940000044.8512064 qam4
34620000044.8512064 qam3
45370000045512064 qam2



Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1ATDMA0010
2ATDMA0000
3ATDMA0000
4ATDMA0000

 

Network Log

Time Priority Description

18/01/2021 14:19:43noticeLAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
18/01/2021 10:10:26criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

 

General Configuration

Network access
Allowed
Maximum Number of CPEs
1
Baseline Privacy
Enabled
DOCSIS Mode
Docsis30
Config file
cmreg-vmdg505-bbt062-b.cm



Primary Downstream Service Flow

SFID135684
Max Traffic Rate402500089
Max Traffic Burst42600
Min Traffic Rate0



Primary Upstream Service Flow

SFID135683
Max Traffic Rate38500089
Max Traffic Burst42600
Min Traffic Rate0
Max Concatenated Burst42600
Scheduling TypeBestEffort
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Message 2 of 6
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Re: Poor upload speed on M350

Note this is on a Hub 3.0 in Modem Mode, with a Google Wifi mesh network serving the house.

I've tried speed tests via Cat6 cable plugged directly into the Google Wifi router (and also directly to the Hub), and I see the same upload speed issues during the day.

Note everything was OK up until Christmas when everyone started working/schooling at home!

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Message 3 of 6
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Re: Poor upload speed on M350

Not sure if the downstream info is useful too:   Downstream bonded channels

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

1258750000-1.540256 qam16
2138750000-238256 qam1
3146750000-239256 qam2
4154750000-2.240256 qam3
5162750000-2.240256 qam4
6170750000-240256 qam5
7178750000-240256 qam6
8186750000-2.238256 qam7
9194750000-2.440256 qam8
10202750000-2.540256 qam9
11210750000-2.240256 qam10
12218750000-240256 qam11
13226750000-1.740256 qam12
14234750000-1.940256 qam13
15242750000-240256 qam14
16250750000-1.740256 qam15
17266750000-1.240256 qam17
18274750000-140256 qam18
19282750000-140256 qam19
20290750000-140256 qam20
21298750000-0.538256 qam21
22306750000-0.540256 qam22
23314750000-0.540256 qam23
24322750000-0.540256 qam24



Downstream bonded channels

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

1Locked40.310011093
2Locked38.9344893820
3Locked39.8348632279
4Locked40.9475282273
5Locked40.3220811871
6Locked40.3129832276
7Locked40.3284192249
8Locked38.9151481416
9Locked40.346521756
10Locked40.319522294
11Locked40.315592076
12Locked40.913641736
13Locked40.39261203
14Locked40.38971354
15Locked40.39361085
16Locked40.3961838
17Locked40.3996661
18Locked40.3975524
19Locked40.3945484
20Locked40.31150540
21Locked38.91335611
22Locked40.31349774
23Locked40.91396445
24Locked40.31369264
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Message 4 of 6
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Re: Poor upload speed on M350

An engineer came out today and replaced an isolator. 

The download speed seems a bit more stable (a constant 350-370+Mbps), but the upload is still pretty poor (5-10Mbps). Anyone got any advice?

New modem stats follow:

Downstream bonded channels

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

13307500000.240256 qam25
2258750000-1.240256 qam16
3266750000-140256 qam17
4274750000-0.940256 qam18
5282750000-0.740256 qam19
6290750000-0.540256 qam20
7298750000-0.240256 qam21
8306750000-0.240256 qam22
9314750000-0.240256 qam23
10322750000040256 qam24
113707500000.240256 qam26
123787500000.240256 qam27
133867500000.240256 qam28
143947500000.240256 qam29
154027500000.440256 qam30
164107500000.540256 qam31
174187500000.540256 qam32
184267500000.740256 qam33
19434750000140256 qam34
204427500001.240256 qam35
214507500001.240256 qam36
224587500001.440256 qam37
234667500001.240256 qam38
244747500001.240256 qam39



Downstream bonded channels

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

1Locked40.9280
2Locked40.3170
3Locked40.3260
4Locked40.9230
5Locked40.9220
6Locked40.3250
7Locked40.3310
8Locked40.3470
9Locked40.9400
10Locked40.9320
11Locked40.9380
12Locked40.3490
13Locked40.3520
14Locked40.3710
15Locked40.3800
16Locked40.3850
17Locked40.31040
18Locked40.3960
19Locked40.31020
20Locked40.31150
21Locked40.91320
22Locked40.31180
23Locked40.31300
24Locked40.31300

 

Upstream bonded channels

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

16030000045.3512064 qam1
23940000044.5512064 qam4
34620000044.5512064 qam3
45370000044.8512064 qam2



Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1ATDMA0000
2ATDMA0000
3ATDMA0000
4ATDMA0000

 

General Configuration

 

Primary Downstream Service Flow

SFID148148
Max Traffic Rate402500089
Max Traffic Burst42600
Min Traffic Rate0



Primary Upstream Service Flow

SFID148147
Max Traffic Rate38500089
Max Traffic Burst42600
Min Traffic Rate0
Max Concatenated Burst42600
Scheduling TypeBestEffort
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Message 5 of 6
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Re: Poor upload speed on M350

Here's a BQM graph for today

https://www.thinkbroadband.com/broadband/monitoring/quality/share/03c454122004e57965bd4bcc26a519d31b...

I tested the speeds twice today

11am : https://www.speedtest.net/result/10815768655.png (350 down, 3up)

4pm: https://www.speedtest.net/result/10817280376.png (380 down, 6up)

Can anyone advise how i should proceed? I've seen worse BQM charts - why is my upload so slow!? Thanks 😄

 

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Message 6 of 6
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Re: Poor upload speed on M350

speed tests:

11am : https://www.speedtest.net/result/10815768655.png`  (350 down, 3up)

4pm: https://www.speedtest.net/result/10817280376.png  (380 down, 6up)

BQM:

https://www.thinkbroadband.com/broadband/monitoring/quality/share/03c454122004e57965bd4bcc26a519d31bb5da89-26-01-2021 

Grateful for any advice!

 

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