I am using LTE internet via Huawei 3372 and it stops for about a minute or two exactly 6 hours after starting the modem (of course during some important call). After it, existing connections continue to work. I'm curious to know what might be causing this.
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?
#72Is your ISP att/fiber? I have exactly the same problem every night at 4am.
Re: Every day at the same time, my internet dies for 1 minute. How do I investigate?
#73traceroute?
Re: Every day at the same time, my internet dies for 1 minute. How do I investigate?
#74I love that almost everyone here has some sort of "family IT syndrome" but still got nerdsniped but the question
Re: Every day at the same time, my internet dies for 1 minute. How do I investigate?
#75Some routers allow to reboot daily at a set time. Worth checking the settings of your router.
Re: Every day at the same time, my internet dies for 1 minute. How do I investigate?
#76At 3:30, disconnect your router from your modem and connect a laptop directly to the modem. No wifi. Start a speed test or long video or something and just watch the modem through to 4:00.
HAVE a separate modem and router.
Re: Every day at the same time, my internet dies for 1 minute. How do I investigate?
#77Launch ´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 packets with low TTL, noting the response time of the intervening routers. This allows mtr to print the response percentage and response times of the internet route to HOSTNAME. A sudden increase in packet loss or response time is often an indication of a bad (or simply overloaded) link.
The results are usually reported as round-trip-response times in milliseconds and the percentage of packetloss.
Re: Every day at the same time, my internet dies for 1 minute. How do I investigate?
#78Launch ´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.
Re: Every day at the same time, my internet dies for 1 minute. How do I investigate?
#79did you check your router (sys)log messages. Many of the routers will allow enabling debug logs as well.
Re: Every day at the same time, my internet dies for 1 minute. How do I investigate?
#801. 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.