Re: NetworkManager removes *STATIC* IP address from interface when link down

[Andrei Borzenkov <arvidjaar gmail com>]

07.07.2020 04:51, Graham пишет:
> Thomas, I'm still struggling with this one.
>
> I read the man page and have created a new file in
> /etc/NetworkManager/conf.d
>
> I also note that the "main" option that you suggested is deprecated in
> favour of per-device options, but I have been unable to get either
> version to work.
>
> The man page gives no examples of usage, so I tried a few things. Listed
> below is what I tried.
>
>
> Any suggestions?
>
>
>
> [main]
>
> main.ignore-carrier
>
> (this would stop NetworkManager from running)
>
> [main]
>
> main.ignore-carrier=1
>
> (no change, link down would cause IP address deconfigure)
>
> [main]
>
> main.ignore-carrier=enp6s0
>
> (no change, link down would cause IP address deconfigure)

This should have been

[main]
ignore-carrier=enp6s0

> [enp6s0]
>
> ignore-carrier
>
> (this would stop NetworkManager from running)
>
> [enp6s0]
>
> ignore-carrier=1
>
> (no change, link down would cause IP address deconfigure)
>
> [enp6s0]
>
> ignore-carrier=true
>
> (no change, link down would cause IP address deconfigure)
>
> [enp6s0]
>
> match-device=interface-name:enp6s0
>
> ignore-carrier=1
>
> (no change, link down would cause IP address deconfigure)

None of these will work.

[device]
ignore-carrier=true

will ignore carrier for all devices

[device-ignore-carrier]
match-device=enp0s0
ignore-carrier=true

Will apply ignore-carrier according to match list.

And yes, NM manuals are hard to understand without also looking at the
sources.