[Bug 799136] Re: dhclient3 tries to access inexistant /var/lib/dhcp3 for lease file

[Kenyon Ralph]

*** This bug is a duplicate of bug 768171 ***
    https://bugs.launchpad.net/bugs/768171

Quoting the original report: "That might cause unnecessary IP changes in
some scenarios, but haven't witnessed any ill effects myself yet."

I have witnessed ill effects. In my case, my ISP's dhcp server provides an incorrect dhcp-server-identifier to clients, so I do this in my dhclient.conf to fix it:
  supersede dhcp-server-identifier 10.124.192.1;

But, this does not take effect if dhclient cannot save a leases file,
which is the case when the /sbin/dhclient3 symlink exists.

** This bug has been marked a duplicate of bug 768171
   /sbin/dhclient3 remains after all dhcp3 packages purged

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https://bugs.launchpad.net/bugs/799136

Title:
  dhclient3 tries to access inexistant /var/lib/dhcp3 for lease file

Status in “isc-dhcp” package in Ubuntu:
  Confirmed

Bug description:
  According to ps dhclient3 tries to store leases in /var/lib/dhcp3, but
  only /var/lib/dhcp exists on natty:

  root       676  0.0  0.0   7080   980 ?        Ss   May30   0:03 dhclient3 -e IF_METRIC=100 -pf /var/run/dhclient.eth0.pid -lf /var/lib/dhcp3/dhclient.eth0.leases eth0
  $ ls -ld /var/lib/dhcp*
  drwxr-xr-x 2 root root 4096 2011-05-30 00:29 /var/lib/dhcp

  That might cause unnecessary IP changes in some scenarios, but haven't
  witnessed any ill effects myself yet.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: isc-dhcp-client 4.1.1-P1-15ubuntu9
  ProcVersionSignature: Ubuntu 2.6.38-8.42-server 2.6.38.2
  Uname: Linux 2.6.38-8-server x86_64
  Architecture: amd64
  Date: Sat Jun 18 15:16:00 2011
  DhclientLeases:
   
  ExecutablePath: /sbin/dhclient
  InstallationMedia: Ubuntu-Server 11.04 "Natty Narwhal" - Release amd64 (20110426)
  KernLog:
   
  ProcAttrCurrent: /sbin/dhclient (enforce)
  ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.38-8-server root=/dev/mapper/hostname-root ro quiet
  ProcEnviron: PATH=(custom, no user)
  ProcVersionSignature_: Ubuntu 2.6.38-8.42-server 2.6.38.2
  SourcePackage: isc-dhcp
  UpgradeStatus: No upgrade log present (probably fresh install)

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