Comments on: Notes on dhcp3-server http://learninginlinux.wordpress.com/2008/03/02/notes-on-dhcp3-server/ Amateur fiddling with GNU/Linux and everything that runs on top of it (Windows, too ;)) Tue, 09 Mar 2010 13:04:55 +0000 http://wordpress.com/ hourly 1 By: yungchin http://learninginlinux.wordpress.com/2008/03/02/notes-on-dhcp3-server/#comment-18 yungchin Wed, 05 Mar 2008 08:10:02 +0000 http://learninginlinux.wordpress.com/?p=30#comment-18 * bangs head on desk * I misread man hibernate.conf: priority "99" is of course a high priority, which means the server gets started very early - before the network interface is up.... So now I set it to "00" and it all works nicely. To be precise, the lines in /etc/hibernate/common.conf now read OnSuspend 99 invoke-rc.d --quiet dhcp3-server stop OnResume 00 invoke-rc.d --quiet dhcp3-server start Alternatively, you could probably use post-up and pre-down rules in /etc/network/interfaces. * bangs head on desk *

I misread man hibernate.conf: priority “99″ is of course a high priority, which means the server gets started very early – before the network interface is up….

So now I set it to “00″ and it all works nicely. To be precise, the lines in /etc/hibernate/common.conf now read

OnSuspend 99 invoke-rc.d –quiet dhcp3-server stop
OnResume 00 invoke-rc.d –quiet dhcp3-server start

Alternatively, you could probably use post-up and pre-down rules in /etc/network/interfaces.

]]> By: yungchin http://learninginlinux.wordpress.com/2008/03/02/notes-on-dhcp3-server/#comment-17 yungchin Tue, 04 Mar 2008 23:17:56 +0000 http://learninginlinux.wordpress.com/?p=30#comment-17 Following up on the suspend/resume problem: I had a look at the current dhcp3-server package for Ubuntu: <a href="https://launchpad.net/ubuntu/hardy/i386/dhcp3-server/3.0.6.dfsg-1ubuntu4" rel="nofollow">see here</a>. That contains a fix, but apparently Ubuntu Hardy uses another package to handle suspend/resume than Debian Etch does by default: the scripts that were added to stop and start dhcpd are placed under /etc/acpi/suspend.d and resume.d - neither of these directories exist on my system... So I looked at the man pages for hibernate and hibernate.conf and figured out I needed to add OnSuspend and OnResume lines to /etc/hibernate/common.conf - but still no luck. For some reason, on resume dhcpd complains that the network interface isn't up yet - even when I give dhcpd a very late starting point of "99" (the WiFi is brought down as specified in the same file common.conf with a DownInterfaces line but you can't specify a 0-99 number for it's priority). To be continued... Following up on the suspend/resume problem: I had a look at the current dhcp3-server package for Ubuntu: see here.

That contains a fix, but apparently Ubuntu Hardy uses another package to handle suspend/resume than Debian Etch does by default: the scripts that were added to stop and start dhcpd are placed under /etc/acpi/suspend.d and resume.d – neither of these directories exist on my system…

So I looked at the man pages for hibernate and hibernate.conf and figured out I needed to add OnSuspend and OnResume lines to /etc/hibernate/common.conf – but still no luck. For some reason, on resume dhcpd complains that the network interface isn’t up yet – even when I give dhcpd a very late starting point of “99″ (the WiFi is brought down as specified in the same file common.conf with a DownInterfaces line but you can’t specify a 0-99 number for it’s priority).

To be continued…

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