method to test for link before dhclient at boot?

Dan Pelleg daniel+bsd at
Thu Feb 19 18:23:02 PST 2004

Duane Winner <duanewinner at> writes:

> Hello,
> I'm wondering if anybody knows a technique for this problem:
> I have a laptop that I frequently boot when it is not plugged into an
> ethernet network.
> In these circumstances, I would like to add some logic during boot time
> that looks at at the status of my fxp0 interface.
> If "status: no carrier" is true, then I do not want dhclient to run. I
> want the boot process to bypass DHCP so that it will boot faster, or so
> that I don't have to hit "CTRL-C" after the hostname is set, and so that
> I can easily run my wireless setup script or ppp manually if I choose to
> connect to a network at all.
> But I still need to be able to detect an active link state on fxp0 and
> lease a DHCP address automatically for when I'm in the office and
> plugged in.
> Is there a way to accomplish this?
> Thanks,
> DW

Use nicmond (net/nicmond in ports). It will do all that, and even bring
your interface up as soon as you plug the network cable in.


  Dan Pelleg

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