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<p class="MsoNormal">Like many others, I am evaluating Kea as a replacement for ISC DHCP. While I can get Kea to behave mostly as I like, I am seeing some odd behaviours when I use shared networks. Here’s one:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">A single phone is assigned an IP address (via dhcrelay). I deliberately set the renew-timer to a low value (100 seconds). When the phone sends a DHCPREQUEST for the same address (after 100 seconds), the server sends a DHCPNAK. This causes
the phone to reboot and restart the DHCP cycle. The second time around the phone succeeds in getting an IP address but a
<u>different</u> one.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I was running Kea with debugging turned on so I have attached the output (as well as the configuration file and a packet trace).
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here’s the lease file showing the same MAC getting different IP addresses:<o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">address,hwaddr,client_id,valid_lifetime,expire,subnet_id,fqdn_fwd,fqdn_rev,hostname,state<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">10.148.1.68,08:00:0f:6c:c5:a9,01:08:00:0f:6c:c5:a9,400,1508526744,2,0,0,,0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"">10.148.1.69,08:00:0f:6c:c5:a9,01:08:00:0f:6c:c5:a9,400,1508526896,2,0,0,,0<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">More on the environment:<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>Kea 1.3.0 beta<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>SLES12 server with more than enough CPU, RAM etc<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any thoughts?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Rob<o:p></o:p></p>
<p class="MsoNormal" style="line-height:115%;background:white;vertical-align:baseline">
<span style="font-size:10.0pt;line-height:115%;font-family:"Arial","sans-serif";color:black;border:none windowtext 1.0pt;padding:0in"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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