Windows 11 Static IP Address

[J Goncalves]

Just a question; is MSoft doing anything about the enability of IP addresses not being able to be maintained in a normal way? Every  hour or 2 I have to restart my PC to get my Internet going. And I've done all tests and settings, with no joy... this since the last update, 24H2.

Thanks.

[Nick H. Supervisor]

On 07/01/2025 at 21:57, J Goncalves said:

Just a question...

Thread moved and renamed to better reflect the question and get help.

My Windows system doesn't need restarting every 2 hours to get an IP address.

When your system stops working on the internet, can you run a cmd line to show us what the computer thinks the IP address is?

[+Warwagon MVC]

After upgrading to 24h2, accessing hostnames was very slow. So I clicked settings / network & Internet / advanced network settings and network reset. After that everything worked good again.

[goretsky Supervisor]

Hello,

What exactly happens to the computer's IP address after a couple of hours?

Regards,

Aryeh Goretsky

 

[Steven P. Administrators]

On 07/01/2025 at 23:51, Warwagon said:

After upgrading to 24h2, accessing hostnames was very slow. 

I noticed this behavior too, but there were other things happening that I could not fix, such as my DS Cam feed kept dropping (never had that happen in the two years I've had it) I got so fed up with Windows 11 that I went back to Windows 10 this past weekend, and everything "just works"  again. No more laggy context menus and buggy File Explorer either!

[Ixion]

On 07/01/2025 at 21:57, J Goncalves said:

Just a question; is MSoft doing anything about the enability of IP addresses not being able to be maintained in a normal way? Every  hour or 2 I have to restart my PC to get my Internet going. And I've done all tests and settings, with no joy... this since the last update, 24H2.

Thanks.

I've not had this issue on any of my Windows 11 machines, what network adapter are you using? Are you connected via Ethernet or Wifi, have you updated your drivers? Are you using a VPN?

Your DHCP lease time will be set by your router, the default lease time on mine (Asus) is 24 hours. Most routers will allow you to assign a preferred (static) IP address to the MAC address of your computer at which point it shouldn't change, Alternatively setting a static IP address on the computer within the correct range and subnet and with your router address as the default gateway should be detected by the router and assigned its own DNS record to reflect that static address.

[+BudMan MVC]

So there is a known issue with 24h2 and dhcp when the dhcp server has specific sorts of options set, like 43 or there is another one - but not remembering it. Could be more.

If you loose your ip every couple of hours or really on any sort of schedule - this screams something wrong with dhcp.

But if your IP is set static on the PC, then that would have zero to do with dhcp.  As been asked already - lets see the output of ipconfig /all on the machine when its working, and then when it stops working.

 

 

[br_]

Probably is the duplicate address detection bug. (The bug is that it doesn’t display any alerts or errors, and just resets the IP)
 

If you’re set to static, but the IP resets itself regularly anyway, that’s windows detecting another machine on the network with the same IP. Don’t ask me how long it took me to figure this out. 

[adrynalyne]

On 10/01/2025 at 09:48, br_ said:

Probably is the duplicate address detection bug. 
 

If you’re set to static, but the IP resets itself regularly anyway, that’s windows detecting another machine on the network with the same IP. Don’t ask me how long it took me to figure this out. 

What kind of crappy router do you have handing out duplicate IP addresses?

Edited January 10 by adrynalyne

[+BudMan MVC]

Doesn't have to be the dhcp server not detecting a dupe on the network currently.. But I have not heard of windows just resetting its interface or giving up its IP if there is a dupe on the network.. But haven't ran in such an issue in really long time, but guess it does give up its ip.. Curious what it does if its dhcp and some other device steps on your IP?

So yeah a dupe IP could cause you all kinds of issues for sure.. Doesn't even have to be a dupe of the gateway IP could just be a dupe of yours and you could have issues talking to the gateway or any other machine on the network, etc

If I change my windows 10 machine to be dupe on the network.. You don't get a warning when you set it, or any sort of popup that I see - but if you look at ipconfig /all you do see that it reports the duplicate and assigns itself a 169.254 address

 

In the event log see this