Menu
Reply
andrewrobinsonu
  • 3
  • 0
  • 0
Joining in
546 Views
Message 1 of 6
Flag for a moderator

Packet loss, high latency and poor peak performance

Putting this in gaming support as it's when it's most noticeable...

I am on 350Mb and have been for years, and have noticed a connection issue within the past few months.

Particularly when doing latency-dependent things such as voice chat, gaming, they become unplayable / unusable due to banding, lag, dropouts. No amount of restarts, reboots (of both modem-mode superhub and routing equipment) or port forwarding resolves the issue.

Happens mostly at peak times (but even today from 12pm onwards). 

I use the SH3 in Modem mode (always have) and have very good networking equipment (and most important devices are wired in, including this one).

Any ideas? I've tried calling and been on hold for 50mins so not keen on doing that...

BQM: https://www.thinkbroadband.com/broadband/monitoring/quality/share/ebf7adb8c22720897b71760c5847074168...

Downstream bonded channels

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

142700000010.140256 qam37
226700000010.140256 qam17
327500000010.540256 qam18
428300000011.340256 qam19
529100000011.440256 qam20
629900000011.340256 qam21
73070000001140256 qam22
831500000011.140256 qam23
932300000011.540256 qam24
1033100000011.840256 qam25
1133900000011.340256 qam26
1234700000010.540256 qam27
133550000001040256 qam28
1436300000010.140256 qam29
1537100000010.140256 qam30
163790000001040256 qam31
173870000009.840256 qam32
1839500000010.340256 qam33
1940300000010.540256 qam34
2041100000010.540256 qam35
2141900000010.540256 qam36
2243500000010.440256 qam38
2344300000010.540256 qam39
244510000001140256 qam40

 

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

1Locked40.91081
2Locked40.36060
3Locked40.95090
4Locked40.94540
5Locked40.33860
6Locked40.93880
7Locked40.33620
8Locked40.33220
9Locked40.92890
10Locked40.92460
11Locked40.92420
12Locked40.32390
13Locked40.92030
14Locked40.92090
15Locked40.91740
16Locked40.92200
17Locked40.91740
18Locked40.91360
19Locked40.91250
20Locked40.91000
21Locked40.91250
22Locked40.31450
23Locked40.9950
24Locked40.91160

 

Upstream bonded channels

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

13940000035512064 qam12
24620000035512064 qam11
35370000035512064 qam10
46030000436.5512064 qam9



Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1ATDMA0010
2ATDMA0000
3ATDMA0010
4ATDMA0000
0 Kudos
Reply
jem101
  • 2.36K
  • 277
  • 1.08K
Very Insightful Person
Very Insightful Person
530 Views
Message 2 of 6
Flag for a moderator

Re: Packet loss, high latency and poor peak performance

Your downstream power levels are all a bit on the high side, however the relatively low number of uncorrected errors indicates that the Hub isn’t struggling too much. The range of downstream power levels is quite narrow, that coupled with the low’ish upstream power makes me think that you are probably quite close to the street cabinet.

Just a couple of T3 timeouts being recorded which is fairly normal but unfortunately the power levels don’t really explain the latency issues. It looks to me just a simple case of over subscription in your area, and we’ve seen far, far worse BQM graphs from others. You need an engineer visit really to fit an attenuators and drop the levels down a bit, but I honestly don’t think that’ll do much if anything for the latency spikes. That’ll only be resolved if and when VM improve the capacity in your area.

What’s your general speed like both up and down? Not far off what you would expect? I’m afraid that a DOCSIS connection, by it’s very nature, can be prone to upstream latency issues (downstream is generally fine).

Doesn’t harm to get an engineer to sort the power levels out though.

andrewrobinsonu
  • 3
  • 0
  • 0
Joining in
525 Views
Message 3 of 6
Flag for a moderator

Re: Packet loss, high latency and poor peak performance

Thanks for the reply Jem.

Speeds vary from 250Mbps to 400Mbps - earlier it was on the low 250Mbps mark, now I'm getting 350 down / 35 up. Proximity to the cabinet is probably 50-75m, though the original engineer had to bury the cable under my lawn which is about 20m itself.

In terms of getting an engineer... would I need to call to arrange that or can that be sorted via here?

In terms of over subscription... what would your advice be here; nothing much to do apart from be a squeaky wheel?

0 Kudos
Reply
Tony246
  • 7
  • 0
  • 0
Tuning in
503 Views
Message 4 of 6
Flag for a moderator

Re: Packet loss, high latency and poor peak performance

I'm having the exact same issues. Gaming is almost impossible as it disconnects every 10-30 seconds. Where did you find all the information you provided

20201230_161710.jpg

in the table format?

0 Kudos
Reply
davetrouser
  • 271
  • 8
  • 31
Superfast
494 Views
Message 5 of 6
Flag for a moderator

Re: Packet loss, high latency and poor peak performance

Same issue here in Area 24. Packetloss in the 5% to 20% range for hours now. T3 timeouts in the logs.

Hilariously, the online "line test" suggests that VM have spotted a way to improve my wifi and suggest calling 150... I'm not using wifi, the hub is in modem mode.

I can't face the BS of calling 150... any staff about that can properly check this?
0 Kudos
Reply
andrewrobinsonu
  • 3
  • 0
  • 0
Joining in
476 Views
Message 6 of 6
Flag for a moderator

Re: Packet loss, high latency and poor peak performance

@Tony, it's from the Superhub's Tools page.

0 Kudos
Reply