#470170 Changing option routers on dhcp3 server, but clients do not change routing table after renew

Package:
isc-dhcp-client
Source:
isc-dhcp
Description:
DHCP client for automatically obtaining an IP address
Submitter:
Date:
2026-08-05 17:33:31 UTC
Severity:
normal
#470170#5
Date:
2008-03-09 17:00:16 UTC
From:
To:
*** Please type your report below this line ***

I change
    option routers 192.168.100.1;
and restart the dhcp3 server:
  /etc/init.d/dhcp3-server restart

Lease time is 600 seconds, so clients renew pretty fast but continue
to use the old router.

Mar  9 17:52:58 alice dhclient: DHCPREQUEST on eth0 to 192.168.100.9
port 67
Mar  9 17:52:58 alice dhclient: DHCPACK from 192.168.100.9
Mar  9 17:52:58 alice dhclient: bound to 192.168.100.107 -- renewal in
272 secon ds.
Mar  9 17:56:27 alice dhclient: DHCPREQUEST on eth0 to 192.168.100.9
port 67
Mar  9 17:56:27 alice dhclient: DHCPACK from 192.168.100.9
Mar  9 17:56:27 alice dhclient: bound to 192.168.100.107 -- renewal in
276 secon ds.
Mar  9 17:56:27 alice NetworkManager: <information>^IDHCP daemon state
is now 3 (renew) for interface eth0
Mar  9 17:57:30 alice dhclient: DHCPREQUEST on eth0 to 192.168.100.9
port 67
Mar  9 17:57:30 alice dhclient: DHCPACK from 192.168.100.9
Mar  9 17:57:30 alice dhclient: bound to 192.168.100.107 -- renewal in
291 secon ds.
Mar  9 18:01:03 alice dhclient: DHCPREQUEST on eth0 to 192.168.100.9
port 67
Mar  9 18:01:03 alice dhclient: DHCPACK from 192.168.100.9
Mar  9 18:01:03 alice dhclient: bound to 192.168.100.107 -- renewal in
238 secon ds.
Mar  9 18:01:03 alice NetworkManager: <information>^IDHCP daemon state
is now 3 (renew) for interface eth0
Mar  9 18:02:21 alice dhclient: DHCPREQUEST on eth0 to 192.168.100.9
port 67
Mar  9 18:02:21 alice dhclient: DHCPACK from 192.168.100.9
Mar  9 18:02:21 alice dhclient: bound to 192.168.100.107 -- renewal in
228 secon ds.
Mar  9 18:05:01 alice dhclient: DHCPREQUEST on eth0 to 192.168.100.9
port 67
Mar  9 18:05:01 alice dhclient: DHCPACK from 192.168.100.9
Mar  9 18:05:01 alice dhclient: bound to 192.168.100.107 -- renewal in
274 secon ds.
Mar  9 18:05:01 alice NetworkManager: <information>^IDHCP daemon state
is now 3 (renew) for interface eth0
Mar  9 18:06:09 alice dhclient: DHCPREQUEST on eth0 to 192.168.100.9
port 67
Mar  9 18:06:09 alice dhclient: DHCPACK from 192.168.100.9
Mar  9 18:06:09 alice dhclient: bound to 192.168.100.107 -- renewal in
243 secon ds.
Mar  9 18:09:35 alice dhclient: DHCPREQUEST on eth0 to 192.168.100.9
port 67
Mar  9 18:09:35 alice dhclient: DHCPACK from 192.168.100.9
Mar  9 18:09:35 alice dhclient: bound to 192.168.100.107 -- renewal in
231 secon ds.
Mar  9 18:09:35 alice NetworkManager: <information>^IDHCP daemon state
is now 3 (renew) for interface eth0
Mar  9 18:10:12 alice dhclient: DHCPREQUEST on eth0 to 192.168.100.9
port 67
Mar  9 18:10:12 alice dhclient: DHCPACK from 192.168.100.9
Mar  9 18:10:12 alice dhclient: bound to 192.168.100.107

But client uses the old router until I do ifdown and ifup on the client:

alice:/home/tale# date ; netstat -rn
su 9.3.2008 18:03:21 +0200
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window
irtt Iface
192.168.100.0   0.0.0.0         255.255.255.0   U         0 0
0 eth0
0.0.0.0         192.168.100.2   0.0.0.0         UG        0 0
0 eth0
alice:/home/tale# date ; netstat -rn
su 9.3.2008 18:08:16 +0200
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window
irtt Iface
192.168.100.0   0.0.0.0         255.255.255.0   U         0 0
0 eth0
0.0.0.0         192.168.100.2   0.0.0.0         UG        0 0
0 eth0
alice:/home/tale# date ; netstat -rn
su 9.3.2008 18:10:00 +0200
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window
irtt Iface
192.168.100.0   0.0.0.0         255.255.255.0   U         0 0
0 eth0
0.0.0.0         192.168.100.2   0.0.0.0         UG        0 0
0 eth0
alice:/home/tale# date ; netstat -rn
su 9.3.2008 18:10:17 +0200
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window
irtt Iface
192.168.100.0   0.0.0.0         255.255.255.0   U         0 0
0 eth0
0.0.0.0         192.168.100.2   0.0.0.0         UG        0 0
0 eth0
alice:/home/tale# ifcown eth0
bash: ifcown: command not found
alice:/home/tale# ifdown eth0
There is already a pid file /var/run/dhclient.eth0.pid with pid 26892
killed old client process, removed PID file
Internet Systems Consortium DHCP Client V3.0.4
Copyright 2004-2006 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/

Listening on LPF/eth0/00:1d:60:24:9a:a7
Sending on   LPF/eth0/00:1d:60:24:9a:a7
Sending on   Socket/fallback
DHCPRELEASE on eth0 to 192.168.100.9 port 67
alice:/home/tale# ifup eth0
Internet Systems Consortium DHCP Client V3.0.4
Copyright 2004-2006 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/

Listening on LPF/eth0/00:1d:60:24:9a:a7
Sending on   LPF/eth0/00:1d:60:24:9a:a7
Sending on   Socket/fallback
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 8
DHCPOFFER from 192.168.100.9
DHCPREQUEST on eth0 to 255.255.255.255 port 67
DHCPACK from 192.168.100.9
bound to 192.168.100.107 -- renewal in 294 seconds.
alice:/home/tale# date ; netstat -rn
su 9.3.2008 18:10:36 +0200
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window
irtt Iface
192.168.100.0   0.0.0.0         255.255.255.0   U         0 0
0 eth0
0.0.0.0         192.168.100.1   0.0.0.0         UG        0 0
0 eth0

My understanding of ISC DHCP is that a client should change its
configuration, if needed, when it renews the lease.

Both client and server are running Etch, updated.
#470170#16
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)