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ComputerMensch
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Router cutting out

I have a client whose router continues to lose connectivity.  I have upgraded the PC (they needed a new one), the modem and the router and yet the connection still cuts out.  They have cable broadband and currently are running on a Netgear MIMO wireless router to which they are connected via Ethernet.  Connecting directly to the modem restores connectivity.  Resetting everything will restore connectivity, but apparently only when I do it (when they do it, it doesn't work although I've shown them many times how to do it).

Is there anything that I can try?  Changing the MTU, perhaps?  Disabling the router's firewall?  I don't mind restarting everything for them, but I'm forty miles away and can't do this every week.

Thanks.
Routers

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rsivanandan

8/22/2022 - Mon
rsivanandan

1. Check for the firmware version of the router, it could be old if so get the latest for the model and upgrade it.

A check that can be done is when the cut-out happens, instead of restarting first can you check how is the router doing by connecting to the router directly (I mean to say the CPU/Memory util.)

Cheers,
Rajesh
ComputerMensch

ASKER
Unfortunately, I upgraded (or checked for an upgrade) to the firmware when I installed it.  

As for connecting directly to the router, the machine is already connected directly to the router at present, unless you mean something else entirely.  Can you elaborate?

I may try to do a netsh reset to see if that works.  Does this sound like a plan?

Thanks,
Frank
rsivanandan

So the device is running the latest firmware available ?

Connecting the router ; What I meant was say the situation comes up and you can't connect to the internet. But still you will be able to connect to the router interface right ? WebUI or some configuration utility for the router? Then at that point take a look at the cpu/memory utilization.

Also doing the netsh reset would be a good idea on the machines so that you can eliminate that problem. Do both;

netsh int ip reset reset.log

netsh winsock reset

and then reboot.

Cheers,
Rajesh
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William Peck
ComputerMensch

ASKER
I checked on it this afternoon and tried the netsh reset, but before doing so, I checked the connection status.  It was reporting that the DNS was the same address of the router.  Will the router automatically assign itself as the DNS server if the cable service cuts out?  That's the only scenario I can think of off hand.

The netsh did not resolve this issue.  However a complete reset did (take everything down and then bring them all up one at a time).

Any clue as to what might be setting the DNS server this way?
rsivanandan

That is not a problem, the router is acting as a dns gateway for your internal machines (I assume that router is handling dhcp and through with it gives the dns as well). This moment I'm typing this, my dns address is my wireless router, I'm using Dlink WBR-1310.

I am starting to think that there is something wrong with the router itself. Is there another one which you can try for a day?

Cheers,
Rajesh
ComputerMensch

ASKER
I took a Linksys off-line because it too was losing connectivity.  Even stranger, sometimes the Linksys would have limited connectivity such that they could get to certain sites, but not to the some sites that they had to get to for business.  So, the long and the short of it is, this router is available but also behaving badly.  I have a spare router, but I suspect a similar problem will occur.  I can't imagine the odds of two bad routers from two different manufacturers making their way to one installation!

It is my understanding that the DNS server should have two entries: the default server and the alternate server.  These entries should be external to the local gateway as they are the portals assigned by the ISP.  If the router itself serves as the DNS, then it simply becomes circular, is this not correct?

Thanks,
Frank
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rsivanandan

Anyways test with the other router as well.

>>About DNS;

Yeah you are correct that usually you'll get 2 dns servers and you assign it to your machines. But working wise you could do a lot of ways to implement it;

1. Configure both the dns servers on the router itself and let router behave as dns server. What it basically does is, receives the request from the host, forwards to the internet to resolving and give it back to the host.

2. OR you can assign both the dns server's ip address directly to your TCP/IP parameters.

Right now if you open your tcp/ip configuration, it would've setup to get ip address dynamically and dns dynamically as well. There you have an option of setting dns static and ip still dynamic. Check out.

Cheers,
Rajesh
ComputerMensch

ASKER
Thanks.  I'm aware of the option 2 and opted not to do this because I have no way of correcting this if and when their connection gets lost again.  I had previously set a static address and when they decided that all hope was lost and connected directly the modem, the static addressing was no longer valid.  This, of course, forced me in to install a new router and keep it dynamic.  Some questions:

-  If I set the IP address dynamically, but set the DNS static, would that work?  
-  Does the host assign the same DNS parameters consistently or does it vary?
-  What would cause the router to lose the DNS?  Would an outage of service from the provider cause this?  Electrical interference?  Angry IP gods?!

Life would be simpler if they simply followed my instructions for a reset.  

Thanks,
Frank
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rsivanandan

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