Connection dropping every 70 minutes on the dot.

Bouge The Dude

Commendable
May 16, 2016
3
0
1,510
I just moved into a new residence (Thibodaux, Louisiana 70301) that never had internet service, but there was a coaxial line run for cable about a decade ago. I contacted Charter to provide internet. The problem that occurs since I moved in is that the internet will shut down every 70 minutes, consistently. Resetting the modem and router did not work at all. The internet comes back up after a minute or two with no need to manually reset my modem or router. Now, I've swapped modems (used my own, the SB6141 that gave me no problems beforehand), I've swapped routers, restored default settings on my old router, used all 4 combinations of old/new router/modem, ipconfig dnsflush, release, renewal, etc. Tech came, claimed he saw no problems. Customer support can't see problem on their end. Router was set to renew IP every 1440 minutes. I'm desperate to get this solution solved after a month of consistent internet drops. This affects all wired and wireless devices; I'm disabled Windows Firewall just to check if there were problems on my end. Techs continue to see no issues, claim it "may" be the neighborhood node. I don't hear of any problems from the neighbors, though. Does anyone have any idea what the issue could be? The tech is coming again Friday, but I'm worried it'll be pointless if work on the line/node is required.

My speed and latency are fine (73mbps/32ms)

»ibb.co/k66oSv (Modem Parameters)
»ibb.co/iaw6FQ (Modem Event Log)

I've run a traceroute to google.com / 8.8.8.8 while the internet was on and off. Sadly, I won't be able to post screenshots until I get home.

Results: google.com / 8.8.8.8 both resulted in "Unable to resolve target system name google.com" / "Destination host unreachable."
 
Solution
Could well be the coax cable....

The technician coming to your house should be able to test the coax cable from the main into your house. He or she should check both continuity and signal loss.

"Lone splitter": splitters degrade and fail regularly. (Just had to replace one of mine.) Hopefully the tech will replace that splitter and verify that it is properly connected and terminated.

The puzzle, to me anyway, is the 70 minute cycle.

All I can think of there is that somewhere else along the mainline is a device that is on some cycle and causing signal loss or a bottleneck that hits some threshold and your service falters.

Try some additional traceroute and pathping runs to both Google and Charter's DNSs.

Ralston18

Titan
Moderator
Have you been able to physically trace the old coaxial line run from your residence back to some pole or post (neighborhood node").

And likewise trace the coax around the new residence? Look for some strange connection, device, etc..

Do any of the router logs (if available and enabled) present any entries at the time of the shutdown (i.e., every 70 minutes)? An entry or error code just before or at the of the shutdown could be very helpful.

All devices being affected - how many devices? One of them may be disrupting the connections. Some buggy program, app, or even some malware that is plaguing you.

Turn off all but one device to see if the problem continues. If not, start adding back devices one by one. If necessary start with another device just by itself in case the first device happens to be the culprit.

Even though you have tried multiple routers/modems make some attempts to see if the shutdown cycle can be changed.

Try changing the IP renewal time to some other value - e.g., 720 minutes. Just to see if the shutdown time changes in some manner. Try 60 minutes. Prove that you do indeed have control of IP renewal frequency.







 

Bouge The Dude

Commendable
May 16, 2016
3
0
1,510
The line is 15 years old and runs under a concrete sidewalk to another house up front; there is one lone splitter from the main line to my own line. The main runs to the pole with no other devices.

It is struggling with renewing an IP. Lease times don't make a difference, however. I've changed the variable on my router settings as well as via ipconfig in cmd.

Some have suggest my line is struggling with upstream; this made sense when I tried to upload a video to YouTube last night and pings increased to 450-550. Also, upstream being 36; it isn't VERY low, but..
 

Ralston18

Titan
Moderator
Could well be the coax cable....

The technician coming to your house should be able to test the coax cable from the main into your house. He or she should check both continuity and signal loss.

"Lone splitter": splitters degrade and fail regularly. (Just had to replace one of mine.) Hopefully the tech will replace that splitter and verify that it is properly connected and terminated.

The puzzle, to me anyway, is the 70 minute cycle.

All I can think of there is that somewhere else along the mainline is a device that is on some cycle and causing signal loss or a bottleneck that hits some threshold and your service falters.

Try some additional traceroute and pathping runs to both Google and Charter's DNSs.

 
Solution

steve7083

Prominent
Oct 30, 2017
1
0
510



Hi, I am posting because I have been having this same issue for 3 months and Charter has been out 5 times with no resolution. We have changed every possible component in the home and we have now had the drop from pole to house changed. Internet still drops every 70 minutes on the dot , problem continues for about 9 days and fixes itself at exactly midnight, starts again 9 days later at exactly midnight.

I have learned that none of my neighbors have this problem but other users on the CMTR? are having the same issue (but not all users). They also said that when it happens it appears my modem switches from the 24 frequency to 28? These terms are not things I understand but I am hoping they may help someone in diagnosing. Charter is at a loss and is not able to give me any possible time-frame for a resolution.

Added information is since I can time out to the second when each drop is coming, they connected at the pole to see if they lost signal there. They did not. They saw no interruption but my modem reset itself as usual and connection was lost in my home for about 65 seconds.