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Every day at the same time, my internet dies for 1 minute. How do I investigate?

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Re: Every day at the same time, my internet dies for 1 minute. How do I investigate?

#81

Post by lambdaba »

KronisLV wrote: post #77
xgbi wrote: post #9

Launch ´mtr google.com’ on one of your devices (preferably connected via Ethernet to your router) a few minutes before the cut off, and watch what happens when the cut occurs. It will show you exactly which equipment on the route starts dropping. Although I suspect your ISP has a 24h lease and your modem renegociates at 3:40 everyday

Here's a summary from the man pages of mtr , for those who are not familiar with the tool but maybe are reading HN on their phones so can't check it out: mtr combines the functionality of the traceroute and ping programs in a single network diagnostic tool. As mtr starts, it investigates the network connection between the host mtr runs on and HOSTNAME by sending packets with purposely low TTLs. It continues to send p…

apropos -s 1 . will list a short description from the manpages (might have to run mandb first)

Re: Every day at the same time, my internet dies for 1 minute. How do I investigate?

#82

Post by _underfl0w_ »

Forbo wrote: post #80
mikewarot wrote: post #60

1. Unplug your Router at some other time, for at least 5 minutes, long enough for your ISP to notice it's absence and give you a different IP address. If your 3:40 PM changes, it's the 24 hour expiration of your external IP. 2. Do a ping 8.8.8.8 from your Linux machine (Raspberry Pi) or ping -t 8.8.8.8 from windows, and watch what happens at 3:40 PM 3. As others have said, turn off uPnP

This assumes that the ISP has a short lived DHCP lease. Comcast Business once tried to charge me to roll my DHCP IP from them. They told me I would have to disconnect my equipment for three weeks for the lease to expire. I told them to go fuck themselves, got a minicipal fiber connection, and never looked back.

Must be nice! I wonder if OP even has the ability to switch ISPs (here in Texas, limited options)

Re: Every day at the same time, my internet dies for 1 minute. How do I investigate?

#83

Post by qwertox »

rem1313 wrote: post #68

What channels do you use on wifi? If you you use DFS channels on 5GHz it could be a radar issue that forces your router to switch channels. I have it as well, but it happens at night so I'm not terribly concerned about it (my router sends me notification thats how I know). Edit: https://en.wikipedia.org/wiki/Dynamic_frequency_selection

The devices are staying connected, so I doubt that this could be the source of the problem.

Re: Every day at the same time, my internet dies for 1 minute. How do I investigate?

#87

Post by aeyes »

0xTJ wrote: post #31
the8472 wrote: post #26

Some german ISPs used to force a reset of home internet connections every 24h to trigger IP changes so that static IPs would remain reserved for the business tier. The time of the reset could be shifted by preemptively reconnecting at a desired time, they only reset the link after 24h of actual uptime.

I get why they do it, but actually causing issues just to cycle IPs seems like a lot. I've had cases where I have the same IP assigned to me for quite a long time.

They already did this on dialup and ISDN, back when routers didn't exist. When DSL first started appearing they just kept doing it. The idea was to not keep unused connections/IPs up, since you didn't have a router you would need to reconnect manually.

Also, it made it harder to run servers until we had services like DynDNS.

On newer connections it isn't common anymore, especially if you have a voice service.

Re: Every day at the same time, my internet dies for 1 minute. How do I investigate?

#88

Post by igetspam »

ksec wrote: post #78
xgbi wrote: post #9

Launch ´mtr google.com’ on one of your devices (preferably connected via Ethernet to your router) a few minutes before the cut off, and watch what happens when the cut occurs. It will show you exactly which equipment on the route starts dropping. Although I suspect your ISP has a 24h lease and your modem renegociates at 3:40 everyday

On the subject of Lease Time. My router is currently showing a lease time of 3 Min. I think most router tends to renew their IP at 50% of ISP's lease time ( in this case 6 min ) What are the purpose of these ridiculously low lease time? I remember in the old days they tend to go for 48 hours if not longer.

To get you to pay more money for a static IP.

Re: Every day at the same time, my internet dies for 1 minute. How do I investigate?

#90

Post by wasdfff »

fisherjeff wrote: post #16
dickfickling wrote: post #6

MY INTERNET HAS BEEN GOING OUT AT 3:40pm PT TOO! Sorry for the all caps. I just scrolled through my texts and saw the “internet out?” texts are at the same time. Hopefully that means it’s a provider issue behind us. Wonder what we have in common? - South Lake Tahoe, CA - Spectrum Gig internet - Asus Zenwifi mesh

Hmmm my Spectrum Gig in OR doesn’t go out at 3:40p but it does pretty much every day at 1pm. I was similarly excited to see this post...

My spectrum cuts out pretty reliably at 12:30am every night. Lets me know its time for bed.
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