[pkg-dhcp-devel] Bug#675372: isc-dhcp-client: dhclient wastes one minute at boot time on an unplugged link

[Andrew Pollock]

severity 675372 normal
thanks

On Thu, May 31, 2012 at 06:35:29PM +0200, Vincent wrote:
> Package: isc-dhcp-client
> Version: 4.2.2.dfsg.1-5
> Severity: important
> 
>   Hello,
> 
>   Recently (corresponding to the installation of 4.2.2.dfsg.1-5), my
> boot time went fromn 15 s to more than 1 minute because dhcp is trying
> hard to get an IP address from an interface with nothing plugged
> into. This looks a bit like #615532, but it happened only very
> recently.
> 
>   In addition, the method mentioned in #615532 doesn't work: I
> installed ifplugd but nothing changes.
> 
>   This is the contents of my interfaces file, which hasn't changed
> since the installation:
> 
> ~ cat /etc/network/interfaces 
> # This file describes the network interfaces available on your system
> # and how to activate them. For more information, see interfaces(5).
> 
> # The loopback network interface
> auto lo
> iface lo inet loopback
> 
> # The primary network interface
> allow-hotplug eth0
> iface eth0 inet dhcp
> 
>   Any idea/workaround ? This is pretty painful !
> 
>   Cheers,
> 
>         Vincent  
> 
> 
> -- System Information:
> Debian Release: wheezy/sid
>   APT prefers testing
>   APT policy: (500, 'testing'), (500, 'stable'), (1, 'experimental')
> Architecture: amd64 (x86_64)
> 
> Kernel: Linux 3.2.0-2-amd64 (SMP w/2 CPU cores)
> Locale: LANG=en_GB.utf8, LC_CTYPE=en_GB.utf8 (charmap=UTF-8)
> Shell: /bin/sh linked to /bin/dash
> 
> Versions of packages isc-dhcp-client depends on:
> ii  debianutils      4.3
> ii  iproute          20120319-1
> ii  isc-dhcp-common  4.2.2.dfsg.1-5
> ii  libc6            2.13-32
> 
> isc-dhcp-client recommends no packages.
> 
> Versions of packages isc-dhcp-client suggests:
> pn  avahi-autoipd  <none>
> pn  resolvconf     <none>
> 
> -- no debconf information
> 
> 

On Tue, Jun 05, 2012 at 08:02:30AM -0700, rimoldi at gmail.com wrote:
> i can confirm the problem on a similar configuration
> a.l.e
> 
> 

I've found the culprit: it's 0.7~rc1+experimental of ifupdown.

Sounds like you folks must have the ifupdown from experimental installed.

Also Cc'ing the ifupdown maintainer (whoa, it's not aj any more?)
I'll have to review #420784 and try to understand what problem is trying to be
solved with adding the -1 flag to dhclient, but that's the cause.

In the meantime, you can work around this by adding 

timeout 10;

to your dhclient.conf. Adjust 10 up or down to taste.
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