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Today's Topics:
1. Issue in dhclient -x option (Rathnakar, Dilip)
----------------------------------------------------------------------
Message: 1
Date: Mon, 13 May 2024 10:15:20 +0000
From: "Rathnakar, Dilip" <dilip.rathna...@hp.com>
To: "dhcp-users@lists.isc.org" <dhcp-users@lists.isc.org>
Subject: Issue in dhclient -x option
Message-ID:
<ph0pr84mb1786e308a59b52c0eb8e6bc383...@ph0pr84mb1786.namprd84.prod.outlook.com>
Content-Type: text/plain; charset="windows-1252"
Hi,
As per dhclient (isc-dhclient-4.4.1) man-page, the "dhclient -x" option should
do the following:
"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."
However, this is not working as expected. It is sending a DHCP release packet
during exit.
Steps to reproduce the behaviour:
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"
2. Ensure dhclient process is running and IP address is acquired.
3. Stop dhclient using: "dhclient -x -pf /var/db/dhclient-eth0.pid -lf
/var/db/dhclient-eth0.leases eth0"
4. Observe release packet in wireshark.
**Expected behavior**
Should stop running of DHCP client without releasing the current lease. (No
Release packet should be sent)
**Actual behavior***
Release packet sent.
**Environment:**
- ISC DHCP version: isc-dhclient-4.4.1
- OS: Ubuntu 16.04
Is this a known issue or is there a workaround for this?
Any inputs would be appreciated.
Thanks,
Dilip
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