Forum Discussion

MattG3's avatar
MattG3
Joining in
3 days ago

2000ms+ lag spikes every 6 minutes

Hey, I'm having a frustrating issue where we get a huge lag spike every 6 minutes. Tried to have a chat with the Virgin Media help phoneline, who sent me a new router. Tried that with nothing else connected but experienced the same issue so I'm fairly certain it's outside our network. Have had the quality monitor running for a while, but because the spike is so short it does not catch it often. Here is a day when it catches one spike -

But this happens EVERY 6ish minutes. If I run a constant ping test we see -

Which makes playing games impossible and video calls irritating! Any Help appreciated!

Router output below. 

Downstream Router stats -

3.0 Downstream channels

ChannelFrequency (Hz)Power (dBmV)SNR (dB)ModulationChannel ID
25331000000-2.40000237.636276QAM25625
1139000000-0.40000237.636276QAM2561
2147000000-1.09999838.605377QAM2562
3155000000-1.29999937.355988QAM2563
4163000000-1.59999837.355988QAM2564
5171000000-1.70000137.355988QAM2565
6179000000-1.70000137.636276QAM2566
7187000000-1.50000037.636276QAM2567
8195000000-1.29999937.636276QAM2568
9203000000-1.00000037.636276QAM2569
10211000000-0.90000237.355988QAM25610
11219000000-0.59999838.605377QAM25611
12227000000-0.50000038.605377QAM25612
13235000000-0.29999937.636276QAM25613
14243000000-0.29999938.605377QAM25614
15251000000-0.29999937.636276QAM25615
16259000000-0.20000138.605377QAM25616
17267000000-0.59999838.605377QAM25617
18275000000-1.00000038.605377QAM25618
19283000000-0.90000238.605377QAM25619
20291000000-0.59999838.605377QAM25620
21299000000-0.09999838.605377QAM25621
22307000000-0.70000138.605377QAM25622
23315000000-1.40000237.636276QAM25623
24323000000-2.20000137.355988QAM25624
26339000000-2.29999937.636276QAM25626
27347000000-2.40000237.355988QAM25627
28355000000-2.50000037.636276QAM25628
29363000000-2.29999937.636276QAM25629
30371000000-2.09999837.636276QAM25630
31379000000-2.20000137.636276QAM25631
32387000000-2.00000037.355988QAM25632



3.0 Downstream channels

ChannelLock StatusRxMER (dB)Pre RS ErrorsPost RS Errors
25Locked37.63627600
1Locked37.63627600
2Locked38.60537700
3Locked37.35598800
4Locked37.35598800
5Locked37.35598800
6Locked37.63627600
7Locked37.63627600
8Locked37.63627600
9Locked37.63627600
10Locked37.35598800
11Locked38.60537700
12Locked38.60537700
13Locked37.63627600
14Locked38.60537700
15Locked37.63627600
16Locked38.60537700
17Locked38.60537700
18Locked38.60537700
19Locked38.60537700
20Locked38.60537700
21Locked38.60537700
22Locked38.60537700
23Locked37.63627600
24Locked37.35598800
26Locked37.63627600
27Locked37.35598800
28Locked37.63627600
29Locked37.63627600
30Locked37.63627600
31Locked37.63627600
32Locked37.35598800



3.1 Downstream channels

ChannelChannel Width (MHz)FFT TypeNumber of Active SubcarriersModulation (Active Profile)First Active Subcarrier (Hz)
159964K1840QAM4096759



3.1 Downstream channels

Channel IDLock StatusRxMER Data (dB)PLC Power (dBmV)Correcteds (Active Profile)Uncorrectables (Active Profile)
159Locked400.22993548063757781

Upstream Router Stats -

3.0 Upstream channels

ChannelFrequency (Hz)Power (dBmV)Symbol Rate (ksps)ModulationChannel ID
13260000032.5205995120 KSym/sec64QAM5
22360000032.5205995120 KSym/sec64QAM6
33940000032.5205995120 KSym/sec64QAM4
44620000032.5205995120 KSym/sec64QAM3
55370000033.0205995120 KSym/sec64QAM2
66030000033.0205995120 KSym/sec64QAM1



3.0 Upstream channels

ChannelChannel TypeT1 TimeoutsT2 TimeoutsT3 TimeoutsT4 Timeouts
1US_TYPE_ATDMA0000
2US_TYPE_ATDMA0000
3US_TYPE_ATDMA0000
4US_TYPE_ATDMA0000
5US_TYPE_ATDMA0000
6US_TYPE_ATDMA0000

Network Log showing at least 2 a day

Network Log

TimePriorityDescription
Mon Apr
28
6CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 1.;CM-MAC=REDACTED;CMTS-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;
Mon Apr
28
3No Ranging Response received - T3 time-out;CM-MAC=REDACTED;CMTS-MAC=REDACTED;CM-QOS=1.1;CM-VER=3.1;

4 Replies

  • legacy1's avatar
    legacy1
    Alessandro Volta

    You have more of a problem then a lag spike you should not see low level packet loss like that VM may need to reboot something or you can reboot the hub or equipment that for BQM pinging to. 

    • MattG3's avatar
      MattG3
      Joining in

      Cheers, I didn't realise that was out of the ordinary to be honest. Would make sense though, if I ping any external IP I see packet loss when this dropout happens. I've rebooted everything in the LAN a few times and switched out the hub for a new one. Bqm is pinging the hub so I think it may be Virgins kit

  • There's constant packet loss in the BQM. Check for local faults on 0800 561 0061 / 150.

    • MattG3's avatar
      MattG3
      Joining in

      No faults registered unfortunately on virg.in/servicechecker, will check via the phone line too though