Bug#459813: marked as done (dhclient unnecessarily brings down interface on lease renew)

Debian Bug Tracking System Wed, 05 Aug 2026 10:34:39 -0700

Your message dated Wed, 05 Aug 2026 17:31:09 +0000
with message-id <[email protected]>
and subject line Bug#1143544: Removed package(s) from unstable
has caused the Debian Bug report #459813,
regarding dhclient unnecessarily brings down interface on lease renew
to be marked as done.


This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
459813: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=459813
Debian Bug Tracking System
Contact [email protected] with problems

--- Begin Message ---

Package: dhcp3-client
Version: 3.0.6.dfsg-1
Severity: important

When dhclient renewed a lease, it *should* call dhclient-script with
RENEW. If it failed, it *should* call the script with EXPIRE.

However, dhclient calls the script with EXPIRE as soon as the lease
expires, issues a PREINIT, and *then* seeks to renew the lease and
issues a BOUND event when successful. This is quite stupid as the
machine goes offline for a second, and it's also not what the
manpages says:

       The  DHCP  client  has  failed  to  renew  its  lease or
       acquire a new one, and the lease has expired.   The IP
       address must be relinquished, and all related parameters
       should be deleted, as in RENEW and REBIND.

I noticed this while developing netconf. Look at its debug output
during a normal renew:

dhclientProxy_eth0: DEBUG: received pair: ['old_dhcp_server_identifier', 
'192.168.14.1']
dhclientProxy_eth0: DEBUG: received pair: ['old_dhcp_lease_time', '30']
dhclientProxy_eth0: DEBUG: received pair: ['old_ip_address', '192.168.14.125']
dhclientProxy_eth0: DEBUG: received pair: ['pid', '3106']
dhclientProxy_eth0: DEBUG: received pair: ['old_expiry', '1199826651']
dhclientProxy_eth0: DEBUG: received pair: ['old_broadcast_address', 
'192.168.14.127']
dhclientProxy_eth0: DEBUG: received pair: ['old_subnet_mask', '255.255.255.128']
dhclientProxy_eth0: DEBUG: received pair: ['PATH', 
'/usr/ucb:/usr/bin:/usr/sbin:/bin:/sbin']
dhclientProxy_eth0: DEBUG: received pair: ['interface', 'eth0']
dhclientProxy_eth0: DEBUG: received pair: ['old_domain_name_servers', 
'192.168.14.1']
dhclientProxy_eth0: DEBUG: received pair: ['old_domain_name', 
'stranger.oerlikon.madduck.net']
dhclientProxy_eth0: DEBUG: received pair: ['old_dhcp_message_type', '5']
dhclientProxy_eth0: DEBUG: received pair: ['old_routers', '192.168.14.1']
dhclientProxy_eth0: DEBUG: received pair: ['reason', 'EXPIRE']
dhclientProxy_eth0: DEBUG: received pair: ['old_filename', 
'/debian-installer/i386/pxelinux.0']
dhclientProxy_eth0: DEBUG: received pair: ['old_network_number', '192.168.14.0']
dhclientProxy_eth0: DEBUG: received pair: ['old_netbios_name_servers', 
'192.168.14.1']
dhclientProxy_eth0: DEBUG: processing data received from dhclient...
dhclientProxy_eth0: INFO: got EXPIRE/FAIL: removing address from interface eth0
dhclientProxy_eth0: DEBUG: queueing event: <Event id=132 type=IPADDR 
completed=0 params={'ACTION': 'delete', 'PREFIXLEN': '255.255.255.128', 
'IFACE': 'eth0', 'ADDRFAMILY': 'inet', 'ADDRESS': '192.168.14.125'}>
MainThread: DEBUG: received event: <Event id=132 type=IPADDR completed=0 
params={'ACTION': 'delete', 'PREFIXLEN': '255.255.255.128', 'IFACE': 'eth0', 
'ADDRFAMILY': 'inet', 'ADDRESS': '192.168.14.125'}>
MainThread: INFO: deleting addresses on interface eth0: inet 192.168.14.125/25
MainThread: DEBUG: received SIGCHLD
dhclientProxy_eth0: DEBUG: received pair: ['interface', 'eth0']
dhclientProxy_eth0: DEBUG: received pair: ['PATH', 
'/usr/ucb:/usr/bin:/usr/sbin:/bin:/sbin']
dhclientProxy_eth0: DEBUG: received pair: ['reason', 'PREINIT']
dhclientProxy_eth0: DEBUG: received pair: ['pid', '3106']
dhclientProxy_eth0: DEBUG: processing data received from dhclient...
dhclientProxy_eth0: INFO: got PREINIT: upping interface eth0
dhclientProxy_eth0: DEBUG: queueing event: <Event id=133 type=IPLINK 
completed=0 params={'LINK_STATE': 'up', 'IFACE': 'eth0'}>
MainThread: DEBUG: received event: <Event id=133 type=IPLINK completed=0 
params={'LINK_STATE': 'up', 'IFACE': 'eth0'}>
MainThread: INFO: bringing interface eth0 up
MainThread: DEBUG: received SIGCHLD
dhclientProxy_eth0: DEBUG: received pair: ['new_filename', 
'/debian-installer/i386/pxelinux.0']
dhclientProxy_eth0: DEBUG: received pair: ['pid', '3106']
dhclientProxy_eth0: DEBUG: received pair: ['old_expiry', '1199826651']
dhclientProxy_eth0: DEBUG: received pair: ['new_broadcast_address', 
'192.168.14.127']
dhclientProxy_eth0: DEBUG: received pair: ['new_domain_name', 
'stranger.oerlikon.madduck.net']
dhclientProxy_eth0: DEBUG: received pair: ['PATH', 
'/usr/ucb:/usr/bin:/usr/sbin:/bin:/sbin']
dhclientProxy_eth0: DEBUG: received pair: ['new_dhcp_lease_time', '30']
dhclientProxy_eth0: DEBUG: received pair: ['old_filename', 
'/debian-installer/i386/pxelinux.0']
dhclientProxy_eth0: DEBUG: received pair: ['new_dhcp_server_identifier', 
'192.168.14.1']
dhclientProxy_eth0: DEBUG: received pair: ['new_domain_name_servers', 
'192.168.14.1']
dhclientProxy_eth0: DEBUG: received pair: ['new_network_number', '192.168.14.0']
dhclientProxy_eth0: DEBUG: received pair: ['old_dhcp_message_type', '5']
dhclientProxy_eth0: DEBUG: received pair: ['new_routers', '192.168.14.1']
dhclientProxy_eth0: DEBUG: received pair: ['new_dhcp_message_type', '5']
dhclientProxy_eth0: DEBUG: received pair: ['new_netbios_name_servers', 
'192.168.14.1']
dhclientProxy_eth0: DEBUG: received pair: ['new_ip_address', '192.168.14.125']
dhclientProxy_eth0: DEBUG: received pair: ['old_netbios_name_servers', 
'192.168.14.1']
dhclientProxy_eth0: DEBUG: received pair: ['old_dhcp_lease_time', '30']
dhclientProxy_eth0: DEBUG: received pair: ['new_expiry', '1199826682']
dhclientProxy_eth0: DEBUG: received pair: ['old_broadcast_address', 
'192.168.14.127']
dhclientProxy_eth0: DEBUG: received pair: ['new_subnet_mask', '255.255.255.128']
dhclientProxy_eth0: DEBUG: received pair: ['old_routers', '192.168.14.1']
dhclientProxy_eth0: DEBUG: received pair: ['interface', 'eth0']
dhclientProxy_eth0: DEBUG: received pair: ['old_network_number', '192.168.14.0']
dhclientProxy_eth0: DEBUG: received pair: ['old_dhcp_server_identifier', 
'192.168.14.1']
dhclientProxy_eth0: DEBUG: received pair: ['reason', 'BOUND']
dhclientProxy_eth0: DEBUG: received pair: ['old_subnet_mask', '255.255.255.128']
dhclientProxy_eth0: DEBUG: received pair: ['old_domain_name_servers', 
'192.168.14.1']
dhclientProxy_eth0: DEBUG: received pair: ['old_domain_name', 
'stranger.oerlikon.madduck.net']
dhclientProxy_eth0: DEBUG: received pair: ['old_ip_address', '192.168.14.125']
dhclientProxy_eth0: DEBUG: processing data received from dhclient...
dhclientProxy_eth0: INFO: got BOUND/REBOOT: configuring interface %s eth0
dhclientProxy_eth0: DEBUG: queueing event: <Event id=134 type=IPADDR 
completed=0 params={'ACTION': 'set', 'PREFIXLEN': '255.255.255.128', 'IFACE': 
'eth0', 'ADDRFAMILY': 'inet', 'ADDRESS': '192.168.14.125'}>
MainThread: DEBUG: received event: <Event id=134 type=IPADDR completed=0 
params={'ACTION': 'set', 'PREFIXLEN': '255.255.255.128', 'IFACE': 'eth0', 
'ADDRFAMILY': 'inet', 'ADDRESS': '192.168.14.125'}>
MainThread: INFO: seting addresses on interface eth0: inet 192.168.14.125/25
MainThread: DEBUG: received SIGCHLD

-- System Information:
Debian Release: lenny/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.23-1-amd64 (SMP w/1 CPU core)
Locale: LANG=en_GB, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages dhcp3-client depends on:
ii  debconf [debconf-2.0]       1.5.17       Debian configuration management sy
ii  debianutils                 2.28.2       Miscellaneous utilities specific t
ii  dhcp3-common                3.0.6.dfsg-1 common files used by all the dhcp3
ii  libc6                       2.7-5        GNU C Library: Shared libraries

dhcp3-client recommends no packages.

-- debconf information:
  dhcp3-client/dhclient-needs-restarting:
* dhcp3-client/dhclient-script_moved:


-- 
 .''`.   martin f. krafft <[email protected]>
: :'  :  proud Debian developer, author, administrator, and user
`. `'`   http://people.debian.org/~madduck - http://debiansystem.info
  `-  Debian - when you have better things to do than fixing systems

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Description: Digital signature (see http://martin-krafft.net/gpg/)

--- End Message ---

--- Begin Message ---

Version: 4.4.3-P1-8+rm

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
[email protected].

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

--- End Message ---

Bug#459813: marked as done (dhclient unnecessarily brings down interface on lease renew)

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