Using Static IP but logs contain numerous entries about configuration changes

Configuration
1

My system has been running for about three years, bare metal install on a Intel NUC. I have noticed repeated, periodic entries in my Host log file that contain this item:

Network configuration changed, trying to establish connection

My “About” page contains the following:

Installation method
Home Assistant OS
Core
2026.9.2
Supervisor
2026.09.0
Operating System
18.2
Frontend
20260826.7

I have been using a static IPv4 address the entire time. I did notice today that IPv6 was enabled, but I have never used it, and I actually would have expected I would have previously turned this off. WiFi is currently disabled as it should be in my environment.

Last night, for the second time since updating into the 9.x Core, I had an issue where the app on my phone, connected to the WiFi in my home, could not connect to the HA system. That issue is what led me to start looking at logs and allowed me to discover this little tidbit.

It happens periodically and I can’t correlate the timing to a specific interval in any way.

Why is this occuring? Is it possibly related to the the Core 9.x code? Configuration issue? Normal?

2

This is very likely your internet provider changing your IP address and nothing to worry about.

3

That is absolutely -not- what’s going on here.

Not only do I not remember the last time my ISP changed my address, but the address on my HA box is static and it is not configured for access from outside of my network.

4

Unless you’re using Matter/Thread, try disabling IPv6 & see if the errors go away

5

Thanks… I have disabled the IPv6 and am letting it run. No recurrence as of yet, but I will need to let it go at least another few hours because some of the intervals were on the longer side in between entries.

6

I see exactly the same thing in my host log. Repeatedly.

2026-09-14 18:05:52.826 homeassistant systemd[1]: Starting Hostname Service...
2026-09-14 18:05:52.858 homeassistant systemd-timesyncd[604]: Network configuration changed, trying to establish connection.
2026-09-14 18:05:52.873 homeassistant systemd-timesyncd[604]: Contacted time server 162.159.200.123:123 (time.cloudflare.com).
2026-09-14 18:05:52.876 homeassistant systemd-timesyncd[604]: Network configuration changed, trying to establish connection.
2026-09-14 18:05:52.891 homeassistant systemd-timesyncd[604]: Contacted time server 162.159.200.123:123 (time.cloudflare.com).
2026-09-14 18:05:52.936 homeassistant systemd[1]: Started Hostname Service.
2026-09-14 18:05:52.941 homeassistant systemd[1]: Starting Time & Date Service...
2026-09-14 18:05:52.954 homeassistant systemd-timesyncd[604]: Network configuration changed, trying to establish connection.
2026-09-14 18:05:52.970 homeassistant systemd-timesyncd[604]: Contacted time server 162.159.200.123:123 (time.cloudflare.com).
2026-09-14 18:05:53.020 homeassistant systemd[1]: Started Time & Date Service.
2026-09-14 18:06:22.971 homeassistant systemd[1]: systemd-hostnamed.service: Deactivated successfully.
2026-09-14 18:06:23.055 homeassistant systemd[1]: systemd-timedated.service: Deactivated successfully.
2026-09-14 20:12:33.094 homeassistant systemd[1]: Starting Hostname Service...
2026-09-14 20:12:33.117 homeassistant systemd-timesyncd[604]: Network configuration changed, trying to establish connection.
2026-09-14 20:12:33.132 homeassistant systemd-timesyncd[604]: Contacted time server 162.159.200.123:123 (time.cloudflare.com).
2026-09-14 20:12:33.137 homeassistant systemd-timesyncd[604]: Network configuration changed, trying to establish connection.
2026-09-14 20:12:33.151 homeassistant systemd-timesyncd[604]: Contacted time server 162.159.200.123:123 (time.cloudflare.com).
2026-09-14 20:12:33.197 homeassistant systemd[1]: Started Hostname Service.

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7

I disabled IPv6 at the OS level on the adapter and restarted. So far, I haven’t see the error re-appear in over four hours. I’ll check it again tomorrow to see if it comes back or not.