Technical Discussion
  >> DSL Hardware Discussion


Register (or login) on our website and you will not see this ad.


Pages in this thread: 1 | [2] | (show all)   Print Thread
Standard User PiKe
(knowledge is power) Thu 24-Jan-19 13:30:15
Print Post

Re: What could cause a router to reboot?


[re: danielhyde] [link to this post]
 
Yes, a switch, a Linksys PAP2 and powerline adapters.
Standard User PiKe
(knowledge is power) Thu 24-Jan-19 13:53:38
Print Post

Re: What could cause a router to reboot?


[re: danielhyde] [link to this post]
 
I've isolated the other network devices by going into a switch first now, and then 1 cable to the router.
Standard User PhilipD
(experienced) Thu 24-Jan-19 15:43:35
Print Post

Re: What could cause a router to reboot?


[re: PiKe] [link to this post]
 
Hi

Worth doing a search for "powerline adapter causing router to reboot". Best to rule them out, they are the devils work smile

Regards

Phil


Register (or login) on our website and you will not see this ad.

Standard User PiKe
(knowledge is power) Fri 25-Jan-19 11:49:16
Print Post

Re: What could cause a router to reboot?


[re: PhilipD] [link to this post]
 
So we had the ethernet going into a technicolor gateway, then linked to the hub 6 via a cable, both devices reset.
Standard User Michael_Chare
(fountain of knowledge) Sat 26-Jan-19 17:31:28
Print Post

Re: What could cause a router to reboot?


[re: PiKe] [link to this post]
 
I have often wondered whether spikes on the power supply can cause problems like the one you have.

Michael Chare
Standard User PhilipD
(experienced) Sun 27-Jan-19 10:31:20
Print Post

Re: What could cause a router to reboot?


[re: Michael_Chare] [link to this post]
 
Hi

It would need to be a drastic spike, the reason being is how the power supply for the router is derived from the mains. The power-brick, now we have lighter ones, are switched mode power supplies, these take the mains AC at 240 volts and converts it to DC with a resulting DC voltage of ~ 340 volts, with components usually rated at 400 or 500 volts in the primary side.

This DC voltage is then turned on and off at a very high frequency under the control of a chip based on feedback from the output voltage, and there is no direct connection between the mains and the resulting DC voltage. Any spikes large enough to cause a blip on the output would be damaging other equipment in the home constantly, i..e a rebooting router would be the least of your concerns and things like the TV would be rebooting, PVRs, games consoles, the computer etc.

The output voltage of 12 volts (typical for routers/modems) is then switched down to even lower voltages in the device (3.3 volt or less), making it even less likely that a voltage blip (of which there are many on the mains supply) would make it all the way to the router itself.

Also the OP has said they get the same problem with a UPS.

Regards

Phil
Standard User PhilipD
(experienced) Sun 27-Jan-19 10:39:44
Print Post

Re: What could cause a router to reboot?


[re: PiKe] [link to this post]
 
Hi

You really need a good troubleshooting approach now to find out what the cause is:

Example:

1) Take the router prone to rebooting, have it turned on but not connected to anything including the telephone line, does it reboot now? If Yes, it's likely some interference coming in from the mains supply or a rather odd mains supply problem, or could be RFI from the air.

2) If no reboots, you can consider the power side fine, so now connect it to the telephone line and let it sync up, but connect nothing else and do not use the connection, does it reboot now? If Yes, then likely EMI coming in from the telephone line or some voltage that shouldn't be there.

3) If no reboots, connect it up to your network switch and start connecting things back to it, one device at a time, until it starts rebooting, you then have identified the problematic device.

No one can give you any other helpful advice really without the above steps taken to find the cause, otherwise it's all guess work.

Good luck.
Standard User jchamier
(eat-sleep-adslguide) Sun 27-Jan-19 11:32:40
Print Post

Re: What could cause a router to reboot?


[re: PhilipD] [link to this post]
 
I see the suggestion of running out of NAT table space has already been mentioned, but also some routers can reboot if the line resync's - one reason I run a separate modem and router.

In the days of O2 and BeThere broadband, some people would choose a 3db margin and some modem/routers wouldn't cope with this and reboot when the SNRM dropped too low. They should have just caused a resync, but maybe the developer thought a reboot and a resync was the same thing !!

plusnet 80/20 (2/jun/14) at 470m - Sync highest was 61/8 now 54/6
20 years of broadband from 1999's ntl:cable modem trial - Live BQM

Pages in this thread: 1 | [2] | (show all)   Print Thread

Jump to