[Bug 311968] [NEW] DHCP very slow and unreliable

[Traumflug]

Public bug reported:

What I expect to happen:

When booting Ubuntu, I expect the computer to get a DHCP lease and to
have networking available as soon as Gnome starts up.

What happens instead:

1 - The boot hangs at the boot splash screen for some 20 to 30 seconds
(already reported as https://bugs.launchpad.net/bugs/114610).

2 - After eventually finishing the boot into Gnome, no network is
available (except localhost).

3 - It needs at least one

    sudo /etc/init.d/network restart

to get the network up. Ethernet network in this case. Often, issueing
the above command more than once is needed.

- - -

This is obviously a regression as this misbehaviour started with one of
the updates very close to 8.10's release date. I had installed 8.10 at
the alpha3 stage.

I tried to boot Jaunty's Xubuntu CD and DHCP times out there as well.

DHCP works just fine if I boot this same computer into Hardy Heron or
Windows.

I tried to debug the issue by catching dhcp packages with dhcpdump.
Please find the logs attached. What I found is, dhcp3 reports a vastly
wrong time for the validity of the lease in case it eventually gets one.
The lease is meant to be valid 14400 seconds while dhcp3 reports some
6000-odd seconds.

- - -
mah at piccard:~$ lsb_release -rd
Description:	Ubuntu 8.10
Release:	8.10
mah at piccard:~$ apt-cache policy dhcp3-client
dhcp3-client:
  Installiert: 3.1.1-1ubuntu2
  Kandidat: 3.1.1-1ubuntu2
  Versions-Tabelle:
 *** 3.1.1-1ubuntu2 0
        500 http://ubuntu.intergenia.de intrepid/main Packages
        100 /var/lib/dpkg/status

** Affects: dhcp3 (Ubuntu)
     Importance: Undecided
         Status: New

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DHCP very slow and unreliable
https://bugs.launchpad.net/bugs/311968
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