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Chade
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Message 1 of 19
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Jitter and Latency Issues?

Ok buckle in, sorry for the long read. So, I'll start by saying that I've been one of the lucky ones in that my Virgin media service has been pretty much rock solid in the many years I've had it, in fact from Diamond Cable to NTL and then to Virgin, it's all be pretty much OK, there's been a few bumps along the way of course, but these were generally sorted out pretty quick, which leads me to this:

buffblo.jpgbblo.jpg

This is my current result from DSLReports, at first glance it doesn't look too bad, the underload results for Down and Up have around 3-4ms of jitter, not great, but manageable. But the Idle ping, which is most similar to a gaming scenario, is 16ms with highs of 30ms, which is obviously a lot of variance, then in the next screenshot if you check the RTT/Jitter average of the download and uploads you can see that Downloads is again not too bad, but uploads have +20ms jitter, which is obviously affecting online gaming.

I'm also using an EdgerouterX with the Hub 3.0 (newest firmware) in modem mode and have QoS enabled via Smart Queue using fq_codel, I have a second router connect to the Edge for Wifi, but even with that disconnected the result is the same. I've tried limited bandwidth via the Edgerouter and that does improve the issue somewhat, but, I'm on the 350mbps service and i have to limit speed to 10mbps up and around 80-90mbps down to get these kind of results, without the Edgerouter things are ten times worse, which obviously begs the question, why should I bother paying for the 350 service? The issue only started recently, there has been some downtime in my area recently, the new firmware update and now I have this erratic ping.

Any feedback from the community would be most welcome, any tips tricks or advice would be awesome. A bit of help from a Virgin representative would be good too of course.

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Andruser
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Message 2 of 19
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Re: Jitter and Latency Issues?

Hi Chade

At the moment I can't see your graphics (presumably waiting for mods to approve) but if the high end of your connection is 30ms, and your peak upload is a further +20ms, that really shouldn't be materially harming your gaming.  As a mediocre gamer myself, I need all the help I can get, and the dark years of VM's Pumagate fiasco were not good for me, but the downside there was 140ms pings, and I'm now down to 30-40ms peaks.

VM actively promote cable as a gaming solution, the unfortunate reality is that the DOCSIS technology used for cable is inferior to the lower bandwidth technologies used by Openreach.  So my suggestion is to accept the numbers you're seeing with VM, or to consider a "slower" connection over Openreach VDSL  Remember that what counts for gaming isn't the bandwidth (speed) of your connection, but the latency, so my 200 Mbps connection could be worse for gaming than a neighbour's 18 Mbps Openreach line.

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Chade
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Message 3 of 19
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Re: Jitter and Latency Issues?

Hey man, thanks for the reply. You're quite right, the scenario I posted above it doesn't equate to my connection being totally unplayable as a whole, but a consistent and regular 20ms+ variation in ping in fps games like Battlefield,CoD, Overwatch and so on is unplayable, and that is a best case scenario. I'm using the Hub 3 in modem mode and an EdgeRouter X with fq_codel based QoS to battle the problem, the issue with that is that I have to limit download bandwidth to around 80-100mbps, making the 350mbps service I pay for pointless.

If I connect directly to the Hub3 or disable QoS on the Edgerouter, things just go all to hell, bufferbloat goes through the roof, and I end up with a RTT of almost 500ms and a significant amount of retransmitted packets, even to servers in the UK, here's what it's like without QoS:

messedup.jpgmess2.jpg

I suspect you are correct though, my connection is unusable for gaming in this state and I'm paying for a service I'm just not receiving if I'm forced to use QoS to make it even approach being usable. I've started looking at other options in my area, I may end up having to cancel Virgin after all these years and go with someone more reliable, which I'll be sad to do after all these years. Smiley Sad

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Forum Team
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Message 4 of 19
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Helpful Answer

Re: Jitter and Latency Issues?

Good morning Chade

 

Thank you for posting on our community forum pages.

 

We are sorry to hear that you have been having issues with your services.

 

We appreciate that this must be frustrating and we'd like to help you on here as much as we can. We wouldn't wan t to lose you as a customer.

 

We'd like to take a closer look at your account on here.

 

If you'd like to proceed with that please let us know and we can advise of the next steps.

 

Many thanks and we look forward to hearing back from you. 

David_Pn
Forum Team

Need help changing SIM card? Find out more about activating your 4G ready SIM. 4G SIM Swap Help


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Chade
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Message 5 of 19
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Re: Jitter and Latency Issues?

Hi David, thanks for the response. You're more than welcome to take a look at my account, any help would be most appreciated. Do I need to do anything more or just keep an eye on this thread?

Thanks again.
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Chade
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Message 6 of 19
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Re: Jitter and Latency Issues?

Modem info:

Downstream bonded channels

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

12990000004.540256 qam21
21390000002.440256 qam1
31470000002.740256 qam2
41550000003.240256 qam3
51630000003.440256 qam4
61710000003.540256 qam5
71790000003.740256 qam6
81870000003.740256 qam7
91950000003.740256 qam8
102030000003.740256 qam9
112110000003.740256 qam10
122190000003.740256 qam11
13227000000440256 qam12
14235000000440256 qam13
15243000000440256 qam14
162510000004.140256 qam15
172590000004.140256 qam16
182670000004.140256 qam17
19275000000440256 qam18
202830000004.340256 qam19
212910000004.140256 qam20
223070000004.640256 qam22
233150000004.640256 qam23
243230000004.640256 qam24
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Chade
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Message 7 of 19
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Re: Jitter and Latency Issues?

Downstream bonded channels

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

1Locked40.9480
2Locked40.345410
3Locked40.3100
4Locked40.9120
5Locked40.9280
6Locked40.9270
7Locked40.3120
8Locked40.980
9Locked40.9260
10Locked40.9290
11Locked40.9150
12Locked40.9110
13Locked40.9190
14Locked40.3230
15Locked40.9120
16Locked40.9130
17Locked40.3220
18Locked40.9270
19Locked40.9170
20Locked40.990
21Locked40.9760
22Locked40.9250
23Locked40.9150
24Locked40.990
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Chade
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Message 8 of 19
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Re: Jitter and Latency Issues?

Upstream bonded channels

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

1462000005.1512064 qam9
2258000335.1512064 qam12
3326000445.1512064 qam11
4394001945.1512064 qam10


Upstream bonded channels

Channel / Channel Type / T1 Timeouts / T2 Timeouts / T3 Timeouts / T4 Timeouts

1ATDMA0000
2ATDMA0000
3ATDMA0000
4ATDMA0000
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Chade
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Message 9 of 19
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Re: Jitter and Latency Issues?

Logs:

Network Log

Time Priority Description

13/03/2019 08:44:38ErrorDHCP RENEW sent - No response for IPv4;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
13/03/2019 09:23:43Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
13/03/2019 09:26:53Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
13/03/2019 09:26:54Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
13/03/2019 09:32:56ErrorDHCP RENEW sent - No response for IPv4;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
13/03/2019 09:49:5ErrorDHCP REBIND WARNING - Field invalid in response;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
13/03/2019 12:00:3Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
13/03/2019 14:06:49Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
13/03/2019 14:06:51Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/01/1970 00:01:38criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
13/03/2019 19:57:45Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
13/03/2019 20:08:49Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
13/03/2019 20:15:35Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
13/03/2019 20:15:43Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
13/03/2019 20:36:15Warning!RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
13/03/2019 21:08:39Warning!Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
14/03/2019 09:31:15criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
22/03/2019 16:25:13ErrorDHCP RENEW sent - No response for IPv4;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
23/03/2019 16:19:10ErrorDHCP REBIND WARNING - Field invalid in response;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
01/01/1970 00:01:37criticalNo Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
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Chade
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Message 10 of 19
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Re: Jitter and Latency Issues?

As far as I'm aware, going by the info' on these forums, power level look ok. I was getting some Post RS errors before that seem to be gone now, but the poor performance still persists. DSLReports still shows a lot of jitter and RTT of 100ms+ to uk servers. Here's some more information from Sourceforge's tests, these show the unstable latency and jitter along with considerable bloat:

jit.jpgjit2.jpgjit3.jpg

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