topic Re: When I turn the PC on, my network goes down in Broadband

When I turn the PC on, my network goes down

Tom90g — Fri, 24 May 2024 05:28:40 GMT

For the past three days, everytime I turn my pc on it knocks out the home network, every device connected loses internet although is still connected.

The PC is connected by Ethernet to a network extender, with this completely disconnected I still lose the network, reset network adaptors on pc, re installed drivers etc etc, the only time in point my network becomes usable is when I power off the pc.

My current setup is Fibre into house, cable from fibre box to router. I have a sky wifi booster upstairs. I have two power line adaptors connected, one for the lounge and one in the main bedroom used only for Ethernet for pc and PS5.

Thought I'd ask here before I contact Sky, cheers

Re: When I turn the PC on, my network goes down

Chrisee — Fri, 24 May 2024 05:52:49 GMT

@Tom90g I would reboot the hub and the extenders and powerline adapters as it sounds like some IP addressing issue. Ensure that only the Hub is acting as a DHCP server as one cause could be another device most probably the PC issueing IP addresses which conflict with the hub's addresses. Every device needs an address in the range 192.169.0.2 to 192.168.0.253 or it wont be "seen" by the hub and therefore lose its internet connection.

IP address issues can be a pain to troubleshoot but at least in the short term set all devices to get their network settings from the Sky hub at 192.168.0.1.

Re: When I turn the PC on, my network goes down

Tom90g — Fri, 24 May 2024 06:14:57 GMT

Appreciate the quick response, first thing I did was reboot the hub, the network extender for the pc I have totally disconnected and reset to factory so it shouldn't pick up anything. Once this mornings parenting duties have been done, I'll turn off the second network extender, reboot hub and see what happens.

in your reply you said that devices need to be withing a certain range to connect to the hub, I have logged into my router and I have 14 devices on the IPv4 address ranging from 0.1 to 0.82. Does this look like an issue?

Re: When I turn the PC on, my network goes down

Chrisee — Fri, 24 May 2024 06:26:41 GMT

@Tom90g If you have a device on 192.168.0.1 that is your problem as that is the address of the hub so immediately you will get a conflict. if you have set devices to use fixed addresses you must make sure you have reserved those addresses onthe Sky hub or it can issue the same address using the DHCP server which would cause lock ups. Alternatively alter the DHCP range tomavoid those addresses by setting the start to 192.168.0.100 for example.

Settings are in Advanced/LAN IP set up on the black Sky hubs.

Re: When I turn the PC on, my network goes down

Tom90g — Fri, 24 May 2024 06:35:12 GMT

@Chrisee thank you, within the list there is 192.168.0.10 which has Sky+HD associated to it. I haven't assigned set addresses for any device, have just let them 'do their thing' when connected.

Re: When I turn the PC on, my network goes down

Chrisee — Fri, 24 May 2024 07:03:37 GMT

@Tom90g if you have left the hub to assign addresses it isnt an IP address issue but as advised before check the PC carefully as it is the likely cause onnthe basic premise things work when its off but dontvwhen its on. Windows has a multitude of settings and its worth updating the network driver.

Re: When I turn the PC on, my network goes down

Tom90g — Fri, 24 May 2024 07:52:49 GMT

I've reset everything, disconnected everything, re connected everything, and yet still, as soon as I turn the pc on it shuts my network down. This is infuriating because I cannot do anything with the pc on in an attempt to look at likely causes or conflicts

Re: When I turn the PC on, my network goes down

TimmyBGood — Fri, 24 May 2024 07:59:41 GMT

@Tom90g

What make and model is the 'network extender'?

Re: When I turn the PC on, my network goes down

Tom90g — Fri, 24 May 2024 08:02:59 GMT

@TimmyBGood TP Link - RE450.

This cannot be the issue in my mind because, even with this reset to factory settings the issue still occurs.

It was also working fine up until three days ago when it all stopped working when pc was booted

Re: When I turn the PC on, my network goes down

TimmyBGood — Fri, 24 May 2024 08:08:33 GMT

@Tom90g

That device does have a DHCP server though, although its own default IP (192.168.0.254) won't conflict with a Sky Hub.

Nothing with a DHCP service should be entirely trusted.

Re: When I turn the PC on, my network goes down

Tom90g — Fri, 24 May 2024 08:15:03 GMT

@TimmyBGood I respect your advice, this device hasn't been connected back up because the issue still exists if it's plugged in or not, even my other network extender is disconnected.

There is a root cause somewhere, and I don't know where to look or what to do. Network settings have been reset, network adaptor drivers for the pc are the latest.

Re: When I turn the PC on, my network goes down

TimmyBGood — Fri, 24 May 2024 08:18:27 GMT

@Tom90g

If you use the ipconfig /all command in a command prompt window on the PC (without a network connection) what does this show as an IP address for the ethernet port?

Re: When I turn the PC on, my network goes down

Tom90g — Fri, 24 May 2024 08:35:05 GMT

@TimmyBGood with Ethernet disconnected, it shows

media state

connection specific dns suffix

description

physical address

dhcp enabled

auto configuration enabled

Re: When I turn the PC on, my network goes down

Tom90g — Fri, 24 May 2024 08:38:02 GMT

With it plugged in I get

IPv4 192.168.0.202 (preferred)

Re: When I turn the PC on, my network goes down

jamesn123 — Tue, 28 May 2024 14:45:22 GMT

@Tom90g

What PC & Ethernet adapter/controller do you have?

Are you saying the issue still occurs when the PC is wired directly to the hub and not through the extender?

Re: When I turn the PC on, my network goes down

Tom90g — Tue, 28 May 2024 15:37:36 GMT

@jamesn123 Hi, I don't have it wired directly to the hub.

The network extender is a TP link RE450.

The issue arises as soon as the pc boots and is connected to the home network, I've done several tasks since my last post to fix the issue and got no where. Have contacted Sky directly and even the lad on the phone was stumped as he could see the network activity increase and get full gigabit download as soon as pc was shut down.

Enginner due 6th June, have ordered a new Router just to rule that out

Re: When I turn the PC on, my network goes down

jamesn123 — Mon, 03 Jun 2024 12:49:19 GMT

@Tom90g

Have you tried wiring it directly to the hub rather than using Wifi?

Re: When I turn the PC on, my network goes down

TimmyBGood — Mon, 03 Jun 2024 12:55:49 GMT

@Tom90g

Conceivably a failing NIC can bring down a network: I once saw this happen where a user had positioned their desktop PC on the edge of an office desk such that the ethernet card was directely above a radiator, and it would cause the entire LAN segment to cease to function if the radiator was on and heating the card.

Re: When I turn the PC on, my network goes down

Tom90g — Mon, 03 Jun 2024 13:00:19 GMT

@jamesn123 I have not.

Would it really make all the difference?

Re: When I turn the PC on, my network goes down

Tom90g — Mon, 03 Jun 2024 13:05:32 GMT

@TimmyBGood Interesting read up that. Its not positioned anywhere near a radiator.

i can see the ethernet and wifi receive data transfer through properties. It works for less than a minute then it stops working, and makes every other device on the network to also stop connecting to the internet.

Everything still stays connected just no internet access.

new router plugged in, didnt fix. Someone said its a duplicate ip, i wouldnt know how to deal with that because i cant kick the pc off when its connected through the hub settings