On 2026-06-28 12:20:38 +0200, Vincent Lefevre wrote:
> Under Debian/unstable, with a wifi connection from the train,
> NetworkManager spams the logs with "state changed new lease"
> regularly every minute: what is the cause?
>
> Jun 28 11:57:41 qaa NetworkManager[1264]: <info> [1782640661.4715] dhcp4
> (wlp0s20f3): state changed new lease, address=10.7.0.171
> Jun 28 11:58:41 qaa NetworkManager[1264]: <info> [1782640721.4779] dhcp4
> (wlp0s20f3): state changed new lease, address=10.7.0.171
[...]
The Mistral AI chatbot pointed me to an explanation and the command
"ip addr show wlp0s20f3" to check the valid_lft value.
I could see that the initial values are
valid_lft 120sec preferred_lft 120sec
and when this value reaches 60sec, the lease is renewed.
So, it seems to be an issue with SNCF's DHCP server, which uses
an incredibly low value!
I suppose that a renewal of the lease enough time before the end
of its validity is expected.
--
Vincent Lefèvre <[email protected]> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / Pascaline project (LIP, ENS-Lyon)
