Red Hat Bugzilla – Bug 979510
dhclient: unable to release lease / DHCPRELEASE
Last modified: 2013-07-22 21:13:48 EDT
Description of problem:
Fedora 17 and 18 dhclients are unable to release a DHCP lease do to a previously introduced patch.
The patch introduced by bug id #800561 causes the dhclient to set the address of the layer 2 destination for DHCPRELEASE packets to the broadcast address (ff:ff:ff:ff:ff:ff). The RedHat bug ID (800561) with the justification for this patch is outlined at the following URL: https://bugzilla.redhat.com/show_bug.cgi?id=800561
Version-Release number of selected component: dhclient-4.2.5-12.fc18.x86_64
How reproducible: Highly
Steps to Reproduce:
1. Acquire dhcp lease
2. Release lease: dhclient –r
Request does not reach DHCP server and leases is not released
Request reaches DHCP server and leases is released
When building and testing with ISC source the problem is not exhibited.
Download the ISC source and build the dhclient using the following default method builds a dhclient that does not send DHCPRELEASE packets with the layer 2 broadcast destination.
Download and uncompress the *.tar.gz file
cd to the uncompressed directory
./configure && make
Furthermore, extracting the dhcp source rpm from Fedora and commenting out the patch that introduced the change to the layer 2 broadcast destination address results in a properly functioning dhclient.
I actually ended up re-writing the patch that causes this bug, but never tried to push it upstream. (I find it a total pain to try to write patches for upstream
since I never found an active upstream tree under source control).
For what it's worth, we've been testing the re-write for 7 months or so
and it appears to work fine. I'm sure we don't hit all possible corner
Any chance you could try this version and see if it works for you?
dhcp-4.2.5-15.fc19 has been submitted as an update for Fedora 19.
dhcp-4.2.5-15.fc18 has been submitted as an update for Fedora 18.
* should fix your issue,
* was pushed to the Fedora 18 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing dhcp-4.2.5-15.fc18'
as soon as you are able to.
Please go to the following url:
then log in and leave karma (feedback).
dhcp-4.2.5-15.fc19 has been pushed to the Fedora 19 stable repository. If problems still persist, please make note of it in this bug report.
dhcp-4.2.5-3.fc17 has been submitted as an update for Fedora 17.
dhcp-4.2.5-15.fc18 has been pushed to the Fedora 18 stable repository. If problems still persist, please make note of it in this bug report.
dhcp-4.2.5-3.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report.