Bug 143704 - DHclient -r doesn't release IP address as it should
DHclient -r doesn't release IP address as it should
Product: Fedora
Classification: Fedora
Component: dhcp (Show other bugs)
i386 Linux
medium Severity medium
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Assigned To: Jason Vas Dias
Depends On:
Blocks: 170780
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Reported: 2004-12-24 10:08 EST by Gael
Modified: 2007-11-30 17:10 EST (History)
1 user (show)

See Also:
Fixed In Version: 3.0.1-16
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2005-09-05 04:31:06 EDT
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Regression: ---
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Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Gael 2004-12-24 10:08:11 EST
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Description of problem:
DHCLIENT from Fedora core 3

the command dhclient -r doesn't release the ip address

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1.dhclient -r

Expected Results:  ip adress should be released from DHCP server

Additional info:
Comment 1 Jason Vas Dias 2005-01-03 17:40:45 EST
The dhclient '-r' release lease option seems to work only
if the dhclient process that got the lease being released
is not running, or is run outside of the /sbin/ifup network
scripts - ie. doing:
  # ifdown eth0
  # ifconfig eth0 up 
  # dhclient eth0
  # dhclient -r eth0
works fine for me.
But if you do:
  # ifup eth0
  # dhclient -r eth0
This will not work; the dhclient process started by 'ifup' is
still around because the 'dhclient -r' process cannot find its
pid file, which is /var/run/dhclient-eth0.pid, and will 
reacquire the lease when it expires. 
You can get around this by doing:
  # dhclient -pf /var/run/dhclient-eth0.pid -r
but this is a pain.
I've now made a dhcp-3.0.1-16 rpm where in release mode, dhclient
will look for the pid file for each requested interface and kill
the dhclient process for that interface if found.
I will get it issued via FC3 updates; meanwhile, you can download it


with dhcp-3.0.1-16, doing a 'dhclient -r eth0' will have the same
effect as 'ifdown eth0' in killing the dhclient instance for eth0.

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