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woj
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1gig deal - only getting ~50% of the download speed

Hello. I've recently got the 1gig deal along with the Hub 4, but I'm only getting around half of the download speed that is advertised (upload consistently at 50mb+ so no issues there).

*FYI: I only have a basic understanding of IT related things, mostly a plug n play guy - I just wanna get the service I pay for*

Connected straight from the back of the Hub to my laptop via ethernet with no switches/splitters.

- Tried different cables, cat5e/6 and up

- Rebooted/pinhole reset the Hub/laptop with and without anything connected

- Tried modem only setting on the Hub

- Tried various network settings on the laptop such as 1gig full duplex, no EEE/green ethernet and so on.

No change.

Will paste downstream/upstream/configuration into 3 separate replies to this.

woj_0-1648212356589.png

woj_1-1648212503180.png

 

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woj
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Re: 1gig deal - only getting ~50% of the download speed

3.0 Downstream channels

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

2533100000011.439QAM25625
113900000014.140.4QAM2561
214700000013.740.4QAM2562
31550000001340.4QAM2563
416300000012.940.4QAM2564
517100000012.640.4QAM2565
617900000012.740.4QAM2566
718700000012.240.4QAM2567
819500000012.240.9QAM2568
920300000012.240.4QAM2569
1021100000012.540.4QAM25610
1121900000012.440.4QAM25611
1222700000012.440.4QAM25612
1323500000012.340.9QAM25613
1424300000012.640.9QAM25614
1525100000012.340.4QAM25615
162590000001340.4QAM25616
1726700000012.740.4QAM25617
1827500000012.840.4QAM25618
192830000001240.4QAM25619
2029100000011.640.4QAM25620
2129900000011.240.4QAM25621
2230700000011.640.4QAM25622
2331500000011.639QAM25623
243230000001240.4QAM25624
2633900000011.540.4QAM25626
2734700000010.739QAM25627
2835500000011.240.4QAM25628
2936300000010.939QAM25629
3037100000011.240.4QAM25630
3137900000011.340.4QAM25631



3.0 Downstream channels

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

25Locked38.98326100
1Locked40.36628700
2Locked40.36628700
3Locked40.36628700
4Locked40.36628700
5Locked40.36628700
6Locked40.36628700
7Locked40.36628700
8Locked40.94620900
9Locked40.36628700
10Locked40.36628700
11Locked40.36628700
12Locked40.36628700
13Locked40.94620900
14Locked40.94620900
15Locked40.36628700
16Locked40.36628700
17Locked40.36628700
18Locked40.36628700
19Locked40.36628700
20Locked40.36628700
21Locked40.36628700
22Locked40.36628700
23Locked38.98326100
24Locked40.36628700
26Locked40.36628700
27Locked38.98326100
28Locked40.36628700
29Locked38.98326100
30Locked40.36628770
31Locked40.36628700



3.1 Downstream channels

Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
33964K1880QAM4096424


3.1 Downstream channels

Channel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)
33Locked4210.9110683860
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woj
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Re: 1gig deal - only getting ~50% of the download speed

3.0 Upstream channels

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

16030000037.85120 KSym/sec64QAM1
23940000037.35120 KSym/sec64QAM4
34620000037.35120 KSym/sec64QAM3
45370000037.55120 KSym/sec64QAM2



3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1US_TYPE_STDMA0000
2US_TYPE_STDMA0000
3US_TYPE_STDMA0000
4US_TYPE_STDMA0000
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woj
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Re: 1gig deal - only getting ~50% of the download speed

General Configuration

Network access
true
Maximum Number of CPEs
1
Baseline Privacy
true
DOCSIS Mode
3.1
Config file
cmreg-vmdg640-bbt076-b.cm



Primary Downstream Service Flow

SFID
190434
Max Traffic Rate
1230000450
Max Traffic Burst
42600
Min Traffic Rate
0



Primary Upstream Service Flow

SFID
190433
Max Traffic Rate
55000270
Max Traffic Burst
42600
Min Traffic Rate
0
Max Concatenated Burst
42600
Scheduling Type
bestEffort
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Adduxi
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Re: 1gig deal - only getting ~50% of the download speed

You are getting the full 1GB to the Hub, so the circuit is working.  However, your power levels are too high on the Downstream and will need a technician to sort this out.

What device are you speed testing with, as VM do not guarantee wifi speeds.   All speed tests should be done with a Cat 6a cable wired directly to the Hub, using a gigabit capable device.

I'm a Very Insightful Person, I'm here to share knowledge, I don't work for Virgin Media. Learn more

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legacy1
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Re: 1gig deal - only getting ~50% of the download speed


@Adduxi wrote:

You are getting the full 1GB to the Hub, so the circuit is working. 


But from where? is it over the internet or  samknows realspeed not so real and VM have implemented with samknows knowing test from 1st hop to hub 

---------------------------------------------------------------
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risc19
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Re: 1gig deal - only getting ~50% of the download speed


@legacy1 wrote:

@Adduxi wrote:

You are getting the full 1GB to the Hub, so the circuit is working. 


But from where? is it over the internet or  samknows realspeed not so real and VM have implemented with samknows knowing test from 1st hop to hub 


What?

My Broadband Ping - Virgin Lagfest Modem Mode
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woj
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Re: 1gig deal - only getting ~50% of the download speed


@Adduxi wrote:

You are getting the full 1GB to the Hub, so the circuit is working.  However, your power levels are too high on the Downstream and will need a technician to sort this out.

What device are you speed testing with, as VM do not guarantee wifi speeds.   All speed tests should be done with a Cat 6a cable wired directly to the Hub, using a gigabit capable device.


It is a wired connection and has been this whole time (don't really care for wifi), I've tested 3 different cables - cat5e/8 (my own) and cat6 (VM's)

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legacy1
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Re: 1gig deal - only getting ~50% of the download speed


@risc19 wrote:

@legacy1 wrote:

@Adduxi wrote:

You are getting the full 1GB to the Hub, so the circuit is working. 


But from where? is it over the internet or  samknows realspeed not so real and VM have implemented with samknows knowing test from 1st hop to hub 


What?


Well we don't really know the inner workings of samknows realspeed with VM for the downstream so anything is questionable so could the way the downstream is tested by the hub detecting a samknows realspeed test and the hub connects to the 1st hop to do a speed test with the hub and sends the test to samknows? Or what if its by UDP or ICMP to the hub and mirrored 3x times at the 1st hop gateway so samknows sends 1/3 of packets and VM mirrors then to for the hub to receive 1Gb and the hub sends how much it received...it would explain why I see a odd number of ICMP timestamps per 1 ping and get 3 replies from VM gateway.

---------------------------------------------------------------
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Oyster
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Re: 1gig deal - only getting ~50% of the download speed

Look up the specifications for cat 6 and ensure your cables meet all those specs and has the correct markings on the cable

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