<div dir="ltr"><div><div>DUID-LLT is not meant to be dynamic in the sense of constantly regenerating itself, it's dynamic in that it creates a new DUID once based on a known hardware ID + timestamp + link local ID to hopefully generate a DUID that is unique (hardware ID and link local ID can be manually changed in most OSs so you can't rely on them being unique).<br>
<br></div>And it defaults to DUID-LLT as that is what is required in the RFC:<i><br>DUID-LL is recommended for devices that have a permanently-connected network interface with a link-layer address, and do not have nonvolatile, writable stable storage. DUID-LL MUST NOT be used by DHCP clients or servers that cannot tell whether or not a network interface is permanently attached to the device on which the DHCP client is running.</i><br>
<br></div>You need to find out why dhclient keeps regenerating the DUID-LLT value, find out where dhclient stores that value and then monitor the file for changes to see what/why it is being changed.<br><br></div><div class="gmail_extra">
<br><br><div class="gmail_quote">On 5 April 2013 18:22, Cory Coager <span dir="ltr"><<a href="mailto:ccoager@gmail.com" target="_blank">ccoager@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr"><div class="im">On Fri, Apr 5, 2013 at 10:42 AM, Steven Carr <span dir="ltr"><<a href="mailto:sjcarr@gmail.com" target="_blank">sjcarr@gmail.com</a>></span> wrote:<br></div><div class="gmail_extra"><div class="gmail_quote">
<div class="im">
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div><div><div dir="ltr">So if it doesn't support the -D flag then what else doesn't it support. When it comes to IPv6 you really need to be on the bleeding edge as the code to support it is still rapidly changing having features/bug fixed.<br>
</div></div></div></blockquote><div><br></div></div><div>I read somewhere online that this flag was added in 4.1.1 where I am using <span style="font-family:arial,sans-serif;font-size:13px">4.1.ESV-R4-0ubuntu5.6 on Ubuntu 12.04. I'm guessing this is an older version then. I wonder if there are any other options available without having to upgrade? Why does it default to LLT? Is there a way to override this besides this flag?</span></div>
<div class="im">
<div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div><div><div dir="ltr">
<div class="gmail_quote"><div dir="ltr"><div>
<br></div>As for the DUID-LLT always changing, that is wrong, RFC3315 states:<br><i>Clients and servers using this type of DUID MUST store the DUID-LLT in stable storage, and MUST continue to use this DUID-LLT even if the network interface used to generate the DUID-LLT is removed. Clients and servers that do not have any stable storage MUST NOT use this type of DUID.<br>
</i></div></div></div></div></div></blockquote><div><br></div></div><div>I agree, the description is misleading. If DUID-LLT is meant to be dynamic, who cares if it changes all the time?</div></div></div></div>
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