[pkg-dhcp-devel] Bug#703688: isc-dhcp-client: Dhclient re-use old IP even if this one is expired

[Stéphane Ascoët]

Package: isc-dhcp-client
Version: 4.1.1-P1-15+squeeze3
Severity: important

Today we are 22 of March 2013.
Here is the DHCP attribution list on my router:

DHCP Clients
Host Name 	MAC Address 		IP Address 	Lease Time Remaining
		00:20:E0:71:31:7C	192.168.1.3	Expired
ubuntu		00:13:A9:61:2D:31	192.168.1.2	1 hours, 39 minutes, 44 seconds

The computer I'm talking about in this bug is 00:20:E0:71:31:7C

Here is the /var/lib/dhcp/dhclient.eth0.leases:
lease {
  interface "eth0";
  fixed-address 192.168.1.3;
  option subnet-mask 255.255.255.0;
  option routers 192.168.1.1;
  option dhcp-lease-time 86400;
  option dhcp-message-type 5;
  option domain-name-servers 192.168.1.1;
  option dhcp-server-identifier 192.168.1.1;
  renew 4 2013/03/21 21:43:50;
  rebind 4 2013/03/21 21:43:50;
  expire 4 2013/03/21 21:43:50;
}
lease {
  interface "eth0";
  fixed-address 192.168.1.3;
  option subnet-mask 255.255.255.0;
  option routers 192.168.1.1;
  option dhcp-lease-time 7200;
  option dhcp-message-type 5;
  option domain-name-servers 192.168.1.1;
  option dhcp-server-identifier 192.168.1.1;
  renew 5 2013/03/22 12:17:39;
  rebind 5 2013/03/22 13:14:53;
  expire 5 2013/03/22 13:29:53;
}

I turned on the compter at 12.29 today, so it should have asked for renewing. It was more than 30 minutes ago and the computer still uses a non-DHCP-server-validated IP! However, I read that this couldn't happen more than five minutes.

-- System Information:
Debian Release: 6.0.3
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: i386 (i686)

Kernel: Linux 2.6.32-5-686 (SMP w/1 CPU core)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages isc-dhcp-client depends on:
ii  debianutils         3.4                  Miscellaneous utilities specific t
ii  iproute             20100519-3           networking and traffic control too
ii  isc-dhcp-common     4.1.1-P1-15+squeeze3 common files used by all the isc-d
ii  libc6               2.11.2-10            Embedded GNU C Library: Shared lib

isc-dhcp-client recommends no packages.

Versions of packages isc-dhcp-client suggests:
ii  avahi-autoipd          0.6.27-2+squeeze1 Avahi IPv4LL network address confi
pn  resolvconf             <none>            (no description available)

-- no debconf information