Vincent Lefevre <[email protected]> wrote:
> 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!
It might be a reasonable time on a train, where connections will be
made and dropped all the time. It's only a problem for people who spend
their time looking at logs!
> I suppose that a renewal of the lease enough time before the end
> of its validity is expected.
>
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