Two dlink routers connected, locks up every 24 hours

[OldJavaNerd]

I don't know how to troubleshoot this. I have a dlink 825 and 855 connected at different ends of our house. They both have current firmware. The one connected to the modem is the dhcp server and the other is not, it's been turned off. The second router is connected to the first through the lan and not wan. Upnp is turned on both routers and they both function as separate access points.

The problem is the crashing and locking up. About every day, usually at night. Results are different each time; sometimes there's not wired internet, sometimes it's wireless, sometimes it one sometimes it's both. To fix, I reset both routers and it resolves it until the next night. Logs seem to flush after I reset so those are no help. Any help is appreciated. Thanks.

 

[pete y testing]

welcome to smallnetbuilder

so first it looks like you have the second router setup correctly so thats prob not the issue but just to confirm have a read through the link below to ensure its setup correctly

Upnp is turned on both routers and they both function as separate access points.

just to correct you their the first is routing and doing wifi and the second is running as a WAP right ?


https://www.smallnetbuilder.com/bas...onvert-a-wireless-router-into-an-access-point

what is the make and model of the modem and is it bridged or just a pure modem or does it also route

the question that needs to be asked is what sort of usage is happening within the lan / wlan and how would that be effecting the nat table etc as the most common issue is torrents flooding the nat table and causing lockups but its not just torrents but the key here is a reset fixes it as this clears the ram and nat table , have a look at the usage within your house client wise and see if its a demand issue

pete

 

[degrub]

I don't know how to troubleshoot this. I have a dlink 825 and 855 connected at different ends of our house. They both have current firmware. The one connected to the modem is the dhcp server and the other is not, it's been turned off. The second router is connected to the first through the lan and not wan. Upnp is turned on both routers and they both function as separate access points.

The problem is the crashing and locking up. About every day, usually at night. Results are different each time; sometimes there's not wired internet, sometimes it's wireless, sometimes it one sometimes it's both. To fix, I reset both routers and it resolves it until the next night. Logs seem to flush after I reset so those are no help. Any help is appreciated. Thanks.

Put a UPS with "true" sine wave to power each router. For testing, plug them into one UPS to see if that solves the issue... otherwise, it may just be dLink reliability. i would rule out power issues first though.

 

[pete y testing]

Put a UPS with "true" sine wave to power each router.

hell of an expensive first faultfinding step and prob not the right first option imho as there is a lot to look at and find out b4 going to the expense of getting an ups just to test the power !!!

 

[degrub]

hell of an expensive first faultfinding step and prob not the right first option imho as there is a lot to look at and find out b4 going to the expense of getting an ups just to test the power !!!

ok, where to start ???

 

[System Error Message]

common problem with dlink hardware, they tend to crash and require reboots.
If you dont want to get new hardware you can try fixing it. Easiest way is to test with 3rd party firmware. If it doesnt sort the problem than a good PSU can help.

 

[OldJavaNerd]

Thanks for the replies.

First: yes both routers are configured as according to that link.

Second: The modem is not a router and doesn't have any wireless capabilities.

Third: This problem happens 99% at night. There are no use of torrents because the PCs are off. In fact everything is off except for the wireless devices that are not in active use. The only heavy traffic thing that's up is our Fosscam on the twins in the nursery. It's a wireless connection with a static IP. My wife's iPhone is monitoring the camera next to her bed, which of course is also wireless, but with a dynamic IP. Maybe I should set her's to a static IP.

Fourth: I don't know if this is a problem but I have had over 100 blocked incoming TCP SynAck packets with unexpected sequences in the past 15 hours. I'm not an expert, it sounds bad, but the router's firewall seems to be doing it's thing. So I'm not sure how to feel about this. Maybe try and get a different IP from my provider?

The power thing intrigues me, why would a UPS matter?

We will be moving soon into a new home that's being built. Maybe I should throw out the dlinks, and go for something more reliable? We have no idea where anything needing a wired connection will be yet. I'm assuming I'll need something with 2 access points or with a powerful wifi capabilities. It will be two levels with all walls and floors insulated. I set up 2 access points because one could not cover both ends of our current house. Plus there will be the need for at least 5 wired connections, but again, I have no idea where those things will be. Hopefully on the same level. Recommendations?

 

[System Error Message]

a UPS wont really matter unless it has a good AC smoothing and voltage output as some problems can happen because the power going in the house isnt that great. However such a UPS is an expensive fix compared to a decent PSU that provides a stable and reliable voltage. A bench PSU would do what you ask for much cheaper but it would end up with a ghetto setup with the case open and wires sticking around.

3 things affect the stability of computers, they are the power being supplied (the fault isnt entirely with the PSU, in PCs some motherboards are better at overclocking than others and same with GPUS). A lot of devices have voltage regulators in doing DC to DC voltage regulation and the quality of that matters too. The quality of the components on the board, the conditions like temperature and lastly firmware.

could also be bad electronic design too.

 

[OldJavaNerd]

Ok I'm completely confused. What does a pc's PSU have to do with anything? The routers are plugged into a different outlet and the PCs are powered off at night. Are you guys saying that the PCs wired to the router being off are the problem?

 

[degrub]

Ok I'm completely confused. What does a pc's PSU have to do with anything? The routers are plugged into a different outlet and the PCs are powered off at night. Are you guys saying that the PCs wired to the router being off are the problem?

all he is pointing out is that power disturbances could have several sources - internal in the device, the wall wart, or incoming power. There could also be a disturbance in the house power from a motor switching on (AC compressor, fridge, etc). On the wifi side, a motor switching on (like a dryer motor for example) which broadcasts a noise burst on all frequencies.

i could also be something like the DHCP lease expiring if it happens at the same time duration. Setting the iphone to static address should solve it if that is the case. Otherwise it may be an IOS wireless interaction issue with the non-apple access point.

Regarding your new house setup - unless you plan to go entirely wireless from the demarcation point, i would at least put 2 cat5e or cat 6 in every room terminated to a central point, even if you don't expect to use them. Have them tested termination to termination before the walls are closed up. If you know where the phone/cable will terminate for the company/user demarcation, i would run a couple cables there from the central location (cat 5e/6 and/or RG6 cable). Once the walls/ceilings are closed up it gets very expensive to add or change.

 

[System Error Message]

a PSU is a power supply unit, it isnt just for PC as every electronic device has one. All it does is supply a DC voltage at a specific spec. Your phone charger is a PSU, routers use a PSU at the plug as well similar to phone charges. There are many ways to convert AC to DC and different efficiencies, problems and costs in every method.

Most commonly when a device hangs or crashes it is either software or a bad PSU. Most of the time changing the router's PSU to a better one fixes the hangs.

Motors do not cause disturbances. Switching based PSUs do (most common PSU type). Disturbances caused by switching PSUs only affect powerline and oscilloscopes other than the device it powers.