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Random Port 1 Drops using Hub 4 in modem mode

liquidkool
Joining in

Hi All,

I have been having an issue over the last couple of months where all of a sudden I was getting random drops to my internet connection throughout the day and evening. Unrelated to contention as the times would be even into the late evening / early mornings.

My setup I use the Hub 4 in Modem mode and have a Linksys WRT3200ACM with OpenWrt running on it. I have set up monitoring on the router. I have gone so far as to change the cable between the router and the hub, change the firmware of the router (Upgraded and downgraded), even change the router with another and still have the same issue. Virgin sent over an engineer and they replaced the Hub. The rest of the day the Hub was fine, then it looks like it must have got an update early one morning and reboot (As I could see this on the monitoring on the Router), and since then this issue has come back. Not as frequent, but from experience before, after rebooting the Hub it would work for about a week, but slowly the drops would become more frequent.

The monitoring I have in place is running pings to cloudflare DNS, Google DNS and the BBC website, and all drop out at the time this occurs. Also the logs on the router are showing that the link starts flapping at that time. It shows that the link to the hub drops and comes back numerous times over about a 30 seconds, though can last for about 2 minutes.

One time I saw this occur I was on the interface section of the OpenWRT gui and noticed that the IP address on the WAN port for the router changed from the usual Internet IP address to 192.168.100.1. This was for about a second or two and then flipped back to Internet IP address you would expect.

When the engineer came out, he did mention he had spoken to some customers he had been to that they had something like this, but could not confirm fully if this was the exact same issue, but sound close enough.

Is there some software/firmware update has been released to these hubs that potentially makes Modem Mode a little unstable? If there are any Virgin Media Technical people reading this I would happy to chat to them to if they would like to get more details on this.

Has anyone else had this type of behaviour over the last couple of months ?

Sorry for the long post.

68 REPLIES 68

Hi @liquidkool 

Thanks for coming back to the thread. I am sorry it's not sorted. From the checks we've done there's no issues showing, levels are all fine. Could you pop the router into router mode please so further checks can be made? 

Can you post your Hub status and logs? How to do this;
• Please go to http://192.168.0.1 (or http://192.168.100.1 - if in modem mode), 
• Don't log in, click on 'router status' 
• Copy/paste the data from each of the tabs as text into a 'REPLY' as opposed to 'QUICK REPLY'. Please do not include your MAC address.
Also, set up a 'Broadband Quality Monitor'. This will monitor the state of your connection and record any network dropouts etc - You can do this at https://www.thinkbroadband.com/broadband/monitoring/quality
Give it a while to gather data and then click 'Share Live graph' and paste the 'Direct Link' into the forum 🙂

John_GS
Forum Team


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Hi John_GS,

Well the last few weeks have actually been ok. Not a single drop (though I did notice some slow downs, but no drops as such) and everything working well. I had it working in Normal mode for about 2 weeks and moved back to modem mode, and everything was stable. Last week I moved over to Virgin Business and got a whole new Hub, and all good since changing (Ran it in normal mode and moved back to modem mode about 2 days ago).  This morning it started its instability all over again:

liquidkool_0-1680558464483.png

 

liquidkool_1-1680558481464.png

https://www.thinkbroadband.com/broadband/monitoring/quality/share/965eb757d36b0e54750aeed13dcf5f6b1b... 

While working everything locks up and my meetings disconnect as a result. So no idea what is going on with your network, but its getting really frustrating.

1 03/30/2023 16:54:36 82001200 Warning RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
2 03/30/2023 17:21:15 68010300 Error DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
3 03/30/2023 17:21:15 68010600 Notice DHCP Renew - lease parameters tftp file-cmbus-vmdg620-bbt093-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
4 03/30/2023 18:19:51 68010300 Error DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
5 03/30/2023 18:19:51 68010600 Notice DHCP Renew - lease parameters tftp file-cmbus-vmdg620-bbt093-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
6 03/30/2023 22:48:04 90000000 Warning MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
7 03/30/2023 22:48:04 73040100 Notice TLV-11 - unrecognized OID;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
8 03/30/2023 22:48:04 68001102 Critical Config File Rejected due to Invalid or Unexpected TLV 11;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
9 03/30/2023 22:48:08 73050400 Warning REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
10 03/30/2023 22:48:08 82001100 Warning RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
11 03/30/2023 22:48:08 82001200 Warning RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
12 03/30/2023 22:48:09 82001100 Warning RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
13 03/31/2023 04:45:11 82000200 Critical No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
14 04/03/2023 05:53:20 67061601 Notice US profile assignment change. US Chan ID: 6; Previous Profile: 12; New Profile: .;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
15 04/03/2023 08:33:43 68010300 Error DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
16 04/03/2023 08:33:43 68010600 Notice DHCP Renew - lease parameters tftp file-cmbus-vmdg620-bbt093-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17 04/03/2023 09:59:42 67061601 Notice US profile assignment change. US Chan ID: 6; Previous Profile: 12; New Profile: .;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
18 04/03/2023 12:33:10 82000200 Critical No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
19 04/03/2023 12:35:25 67061601 Notice US profile assignment change. US Chan ID: 6; Previous Profile: 11; New Profile: 12.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;

Downstream Overview

Port IDFrequency (Hz)ModulationPotencia (dBmV)ChannelSNR (dB)atio (dB)BytesCorrectedsUncorrectables
1138750000QAM2568.300140.366118877279070
2146750000QAM2568.500240.36630272773780
3154750000QAM2568.599340.36630203402060
4162750000QAM2568.599440.94630379956370
5170750000QAM2568.599540.36630191123910560
6178750000QAM2568.599640.36630225105951360
7186750000QAM2568.599740.9462968422461360
8194750000QAM2568.699840.36630187097500
9202750000QAM2568.599940.94614260552460
10210750000QAM2568.6991040.946143271806100
11218750000QAM2568.5001140.94614286028470
12226750000QAM2568.4001240.36614029885470
13234750000QAM2568.1991340.94613955247800
14242750000QAM2568.0001440.94613998666480
15250750000QAM2567.8001540.36613972321380
16258750000QAM2567.8001640.36613991787370
17266750000QAM2567.5991740.36614340544660
18274750000QAM2567.9001840.36614408869460
19282750000QAM2567.8001940.36614339535470
20290750000QAM2567.9002040.36614408103400
21298750000QAM2568.3002140.36613813701600
22306750000QAM2568.5002240.94614333135370
23314750000QAM2568.5002340.94614329607860
24322750000QAM2568.0002440.36614317838350
25330750000QAM2567.6992540.94620498703370
26338750000QAM2567.5002640.94620488932670
27346750000QAM2567.5002740.36620548086650
28354750000QAM2567.1992840.36620568128240
29362750000QAM2567.1992940.36620545407100
30370750000QAM2567.4003040.36620551695880
31378750000QAM2567.4003140.94620579869980
32  false0false000

Upstream Overview

Port IDFrequency (Hz)ModulationPotencia (dBmV)ChannelBandWidth
12360000064QAM44.5205 
23010000064QAM45.0204 
33660000064QAM45.5203 
44310000064QAM46.0202 
54960000064QAM47.0201

OFDM Downstream Overview

ReceiverFFT typeSubcarr 0 Frequency(Hz)PLC lockedNCP lockedMDC1 lockedPLC power(dBmv)
0NANANONONONA
14K367600000YESYESYES8.400002

 

OFDMA Overview

Channel IndexStatelin Digital AttDigital AttBW (sc's*fft)Report PowerReport Power1_6FFT Size
0OPERATE0.197411.004210.000047.208839.25002K
1DISABLED0.00000.00000.00000.00000.00002K

Reece_MH
Forum Team (Retired)
Forum Team (Retired)

Hi liquidkool,

Thanks for your updates on this. 

I'm sorry to hear the issue has since returned. Unfortunately, we are limited on the support we can offer with Virgin Media Business services, and if the issue has begun to occur since moving to those services, it would be best to contact their Customer Care Team on 0800 052 0800, where they can run further diagnostics and assist.

Thanks,

Reece - Forum Team


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The issue has been occurring since being on the residential contract. Still using the same line and connection. So as mentioned many times before, there is an issue on the VM side. 

One thing which may be important to mention, is that about 5 years ago we had a dropped kerb done outside our house. The VM cable there got snapped due to the tension that was put on it. I did tell VM that they should replace the cable but they refused and did a rejoin. When I had one of your technicians that came round recently, I mentioned this to him, and he had a feeling that possibly the join is failing somehow. 

Maybe this needs to be raised again and possibly the cable needs to be relaid. 

Either way this is not a new issue as a result of moving over to the business side of VM. This has been going on for about 3 to 4 months now. 

If you have VM Business - I'd raise it with them as you will actually have a SLA to maintain service whereas home broadband doesn't!

You stand more chance of it being fixed with VM Business



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Hub 3 - Modem Mode - TP-Link Archer C7