Hourly disconnects
Hi all,
Looking for some advice really... Bit of a long story.. Was on 100Mb with a SH2AC, everything running along fine. Upgraded the TV to a V6 and still running fine for several weeks. Then started getting disconnects where the internet light would go red for 30 seconds or so. This was happening pretty much hourly. I have a thinkbroadband monitor in place which was showing packet loss every hour on the hour. Tracked this down (thanks to some help on the VM Forum) to an hourly DHCP lease. This became a problem for streaming etc, especially with 2 kids in the house! Called VM and got a technician out who swapped the SH2AC for a Hub 3. After he left and I finally got into the web management on the Hub 3 (man it's slow on the interface !) and saw that I was still getting hourly DHCP renews despite the change in equipment and IP address. The Hub 3 seems to handle things better in that I don't get a total drop in service every hour but it's one of those things that really bug me and I'd like it fixed. This is where the problems kick in... I have called 150 several times, getting India each time, and been talked through rebooting the hub (and told that if I can get to bbc.co.uk after it's working fine) and also told that my wifi may be poor (!). I have a thread on the official forum ( http://community.virginmedia.com/t5/...541763#M175100 ) which VM have roundly ignored for 3 weeks now and just don't know what to do to get this resolved. Hoping one of you guys may have some advice....? Thanks Bri |
Re: Hourly disconnects
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I suspect the hourly renewal previously was a result of a separate issue, a symptom rather than a cause. If your connection is stable and good now, then don't worry about it. |
Re: Hourly disconnects
Thanks Kushan,
I was definitely getting hourly disconnects on the SH2AC, we couldn't stream from iplayer etc reliably as the connection did a full drop followed by a DHCP renewal and reconnect. This also showed as an hourly spike of packet loss on the thinkbroadband quality monitor (can be seen on the official VM Forum link in my first post). The Hub 3 seems to handle it much more gracefully but the logs are just full of DHCP renewals every 45 minutes or so: Network Log Date And Time Error Number Event Description 2017-10-25 15:51:16.00 68010100 DHCP RENEW sent - No response for IPv4;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-25 16:00:18.00 68010400 DHCP REBIND WARNING - Field invalid in response;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-25 16:00:18.00 68010600 DHCP Renew - lease parameters tftp file-cmreg-vmdg505-rtsl10016u-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-25 16:33:16.00 68010100 DHCP RENEW sent - No response for IPv4;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-25 16:42:19.00 68010400 DHCP REBIND WARNING - Field invalid in response;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-25 16:42:19.00 68010600 DHCP Renew - lease parameters tftp file-cmreg-vmdg505-rtsl10016u-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; This has been happening for a month solid and compared to my previous DHCP leases of 5 - 7 days seems a bit weird...? Thanks again Bri |
Re: Hourly disconnects
Do you have a free www.thinkbroadband.com monitor?
https://www.thinkbroadband.com/broad...toring/quality |
Re: Hourly disconnects
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Yes, the graph from my 2AC is in the VM forum (link to thread in first post). I have one setup for my new IP (when the Hub 3 got installed) which is much better with just a couple of small packet losses in the early hours. Thanks Bri |
Re: Hourly disconnects
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Re: Hourly disconnects
Are you using OpenDNS? Some months ago I had a similar problem and thought I had a virus but couldn't find anything.
After a lot of help from someone on the Malwarebytes Forums and finding nothing he suggested trying OpenDNS or Google DNS. I was already using OpenDNS so switched to Google and the problem stopped. Google DNS 8.8.8.8 8.8.4.4 |
Re: Hourly disconnects
Hi,
It's not my internal network DHCP with an hourly lease, it's the modem / VM DHCP. It's been going on for a month now and I'm unfortunately not getting anywhere with getting it back to a week's lease so I guess I'll just ignore it for now. If there is a connection issue as Kushan thinks then unfortunately it's not showing in any of the other stats which all appear to be fine. Thanks again |
Re: Hourly disconnects
I get those DHCP errors all the time on my SH3, and it doesn't cause my any disconnects so I'm inclined to agree with Kush here.
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Re: Hourly disconnects
I have had a look at your graph and it's amazing that it happens every hour like clockwork. Can you post stats in here out of curiosity. If you don't know what to do click here. Have you got a spare 3rd party router so you can put the shub into modem mode and use another router?
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Re: Hourly disconnects
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No problem, stats below: Downstream bonded channels Channel Frequency(Hz) Power(dBmV) SNR(dB) Modulation Channel ID 1 299000000 2.4 38.6 256 qam 13 2 323000000 1.7 40.3 256 qam 16 3 315000000 2 40.3 256 qam 15 4 307000000 2.4 40.3 256 qam 14 5 291000000 2.5 40.3 256 qam 12 6 283000000 2 40.3 256 qam 11 7 275000000 2.4 40.3 256 qam 10 8 267000000 2.2 38.9 256 qam 9 9 259000000 2.7 38.9 256 qam 8 10 251000000 2.5 38.9 256 qam 7 11 243000000 3 38.9 256 qam 6 12 235000000 3 38.6 256 qam 5 13 227000000 3.7 40.3 256 qam 4 14 219000000 3.5 40.9 256 qam 3 15 211000000 4 40.3 256 qam 2 16 203000000 4.3 40.3 256 qam 1 Upstream bonded channels Channel ID Frequency(Hz) Mode Power (dBmV) Modulation Channel Bandwidth(Hz) Symbol Rate (ksps) 2 39400000 ATDMA 41.8 64 qam 6400000 5120 1 46200000 ATDMA 41.8 64 qam 6400000 5120 Operational Configuration General Configuration Value Network access Enabled Maximum Number of CPEs 1 Baseline Privacy Enabled Docsis Mode Docsis30 Config file ;kfoA,.iyewrkldJKDHSUBsgvca69 Primary Downstream Service Flow SFID 438 Max Traffic Rate 115000000 Primary Upstream Service Flow SFID 437 Max Traffic Rate 6320000 Network Log Date And Time Error Number Event Description 2017-10-27 15:26:22.00 68010400 DHCP REBIND WARNING - Field invalid in response;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-27 15:26:22.00 68010600 DHCP Renew - lease parameters tftp file-cmreg-vmdg505-rtsl10016u-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-27 15:59:28.00 68010100 DHCP RENEW sent - No response for IPv4;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-27 16:08:33.00 68010400 DHCP REBIND WARNING - Field invalid in response;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-27 16:08:33.00 68010600 DHCP Renew - lease parameters tftp file-cmreg-vmdg505-rtsl10016u-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-27 16:41:22.00 68010100 DHCP RENEW sent - No response for IPv4;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-27 16:50:24.00 68010400 DHCP REBIND WARNING - Field invalid in response;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-27 16:50:24.00 68010600 DHCP Renew - lease parameters tftp file-cmreg-vmdg505-rtsl10016u-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-27 17:23:29.00 68010100 DHCP RENEW sent - No response for IPv4;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-27 17:32:33.00 68010400 DHCP REBIND WARNING - Field invalid in response;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-27 17:32:33.00 68010600 DHCP Renew - lease parameters tftp file-cmreg-vmdg505-rtsl10016u-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-27 18:05:23.00 68010100 DHCP RENEW sent - No response for IPv4;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-27 18:14:23.00 68010400 DHCP REBIND WARNING - Field invalid in response;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-27 18:14:23.00 68010600 DHCP Renew - lease parameters tftp file-cmreg-vmdg505-rtsl10016u-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-27 18:47:27.00 68010100 DHCP RENEW sent - No response for IPv4;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-27 18:56:32.00 68010400 DHCP REBIND WARNING - Field invalid in response;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-27 18:56:32.00 68010600 DHCP Renew - lease parameters tftp file-cmreg-vmdg505-rtsl10016u-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-27 19:29:22.00 68010100 DHCP RENEW sent - No response for IPv4;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-27 19:38:24.00 68010400 DHCP REBIND WARNING - Field invalid in response;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; 2017-10-27 19:38:24.00 68010600 DHCP Renew - lease parameters tftp file-cmreg-vmdg505-rtsl10016u-b.cm modified;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0; The thinkbroadband graph you saw was from the SH2AC and suddenly started getting a 1 hour DHCP lease from VM, upon renewal it would disconnect and reconnect causing dropouts and the hourly packet loss. The Hub 3 seems to handle things more gracefully but has been installed for two weeks now and still getting an hour DHCP lease. I do have an old Cisco E4200v1 somewhere which I might dig out over the weekend if I get a minute (2 kids makes troubleshooting a little tricky !) Thanks Bri |
Re: Hourly disconnects
absolutely dude, the E4200 as old as it is now will handle the download speed no probs so you don't need to worry about a performance decrease. Your power levels are fine which makes me think it is a more serious problem up the network but I am very curious to see what will happen when the shub gets put in modem mode.
The thing is that if it was a problem higher up like at the cmts, it should be affecting everybody and you would think a lot of people would notice hourly disconnects and be ringing up and VM would be aware of it. I would suggest hooking up the Linksys asap this morning so you can leave it connected all weekend and have a solid two days of graphing for diagnostic purposes. When you put the shub in modem mode your Linksys is going to get a completely different ip address (which is a good thing in your case) so you'll need to update the info for your TBB graph. When you do can you share the live graph (not a snapshot) in this thread. I'll be watching it this weekend and there are many forum users who are far more knowledgeable than me (including VM network techs) who I am sure will be keeping an eye on it as well). |
Re: Hourly disconnects
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