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<p class="MsoNormal"><span lang="EN-US">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal">As per dhclient (isc-dhclient-4.4.1) man-page, the "dhclient -x" option should do the following:
<o:p></o:p></p>
<p class="MsoNormal">"Stop the running DHCP client without releasing the current lease. Kills existing dhclient process as previously recorded in the PID file. When shutdown via this method dhclient-script will be executed with the specific reason for calling
the script set."<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">However, this is not working as expected. It is sending a DHCP release packet during exit.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Steps to reproduce the behaviour:<o:p></o:p></p>
<p class="MsoNormal">1. Start dhclient using: "dhclient -d -q -cf /var/db/dhclient-eth0.conf -lf /var/db/dhclient-eth0.leases -pf /var/db/dhclient-eth0.pid eth0"<o:p></o:p></p>
<p class="MsoNormal">2. Ensure dhclient process is running and IP address is acquired.<o:p></o:p></p>
<p class="MsoNormal">3. Stop dhclient using: "dhclient -x -pf /var/db/dhclient-eth0.pid -lf /var/db/dhclient-eth0.leases eth0"<o:p></o:p></p>
<p class="MsoNormal">4. Observe release packet in wireshark.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">**Expected behavior**<o:p></o:p></p>
<p class="MsoNormal">Should stop running of DHCP client without releasing the current lease. (No Release packet should be sent)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">**Actual behavior***<o:p></o:p></p>
<p class="MsoNormal">Release packet sent. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="FR">**Environment:**<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR">- ISC DHCP version: isc-dhclient-4.4.1 <o:p>
</o:p></span></p>
<p class="MsoNormal"><span lang="FR"> </span>- OS: Ubuntu 16.04<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Is this a known issue or is there a workaround for this?<o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Any inputs would be appreciated.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Dilip<o:p></o:p></span></p>
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