Red Hat Bugzilla – Bug 143704
DHclient -r doesn't release IP address as it should
Last modified: 2007-11-30 17:10:57 EST
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.5) Gecko/20041111 Firefox/1.0 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: Always Steps to Reproduce: 1.dhclient -r 2. 3. Expected Results: ip adress should be released from DHCP server Additional info:
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 from: http://people.redhat.com/~jvdias/dhcp/FC3/ 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.