MIME-Version: 1.0 (Apple Message framework v1082)
Subject: dhclient -6 Decline
Date: Tue, 8 Mar 2011 11:26:09 -0500
Message-ID: <6943BFC5-F466-411D-97AB-E8EECB8065BF@iol.unh.edu>
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To: dhcp-bugs@isc.org
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From: Timothy Carlin <tjcarlin@iol.unh.edu>
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Hello All,

Sorry to trouble you again.  I have another question regarding the ISC dhclient, when used for acquiring an IPv6 address.  The version I am using is the latest from the website, and is reporting isc-dhclient-4.2.1.

It seems that the client is not generating a DHCPv6 Decline message when an IPv6 Address has been duplicated on the link.  What appears to happen is, despite the kernel rejecting the binding of the address, dhclient continues on, and in fact attempts to Renew the address when T1 expires.

It seems that in my configuration the "dhclient-script" is correctly returning the error code of 3 from "exit_with_hooks", indicating that it determined the address was duplicated.  From there I am not sure if dhclient is processing the return code, or if there is something else happening.

Is this currently a known issue with dhclient6 or particular distributions of GNU/Linux?  So far I've tried with current releases of OpenSUSE and Fedora distributions.

Thanks again for your help.

Best Regards,
Timothy Carlin

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Timothy Carlin
tjcarlin@iol.unh.edu