#703688 isc-dhcp-client: Dhclient re-use old IP even if this one is expired

Package:
isc-dhcp-client
Source:
isc-dhcp
Description:
DHCP client for automatically obtaining an IP address
Submitter:
Stéphane Ascoët
Date:
2026-08-05 17:33:51 UTC
Severity:
minor
#703688#5
Date:
2013-03-22 12:16:40 UTC
From:
To:
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.
#703688#12
Date:
2026-08-05 17:31:09 UTC
From:
To:
Dear submitter,

as the package isc-dhcp has just been removed from the Debian archive
unstable we hereby close the associated bug reports.  We are sorry
that we couldn't deal with your issue properly.

For details on the removal, please see https://bugs.debian.org/1143544

The version of this package that was in Debian prior to this removal
can still be found using https://snapshot.debian.org/.

Please note that the changes have been done on the master archive and
will not propagate to any mirrors until the next dinstall run at the
earliest.

This message was generated automatically; if you believe that there is
a problem with it please contact the archive administrators by mailing
ftpmaster@ftp-master.debian.org.

Debian distribution maintenance software
pp.
Thorsten Alteholz (the ftpmaster behind the curtain)