> In either case we'd be looking at an openvpn configuration
> directive (or 2) that takes a command to run once
> the link comes up (and down).  If that was in place then
> any of A, B, C, or D, or your choice of using an ifup/ifdown
> script would all work.

BTW, there are generic tools to run/stop dhcp clients (and other
configuration steps) when the interface goes up/down.  I've used ifplugd
for it, but IIUC there are others.

I think if the user just starts the dhcp client on an interface
independently from the moment the interface goes up (or down), this is
simply a misconfiguration.

> Given that.  Why not just use -up and --down to do what's
> needed?  Avoid changing the code and write documentation.

Sounds about right,


        Stefan

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