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<p class=MsoNormal><span style='color:#1F497D'>Hello folks,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>I’m trying to fully
understand the state transitions for leases with respect to failover, and I’m
hoping that someone can help me understand the situation I’m seeing.
This behavior appears consistent between version 3.0.6 and 3.1.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>After the primary server has
issued the “real” lease (i.e. not the MCLT lease) to the client,
and the binding update has been acknowledged by the failover server, then everything
is happy. Now, say the client goes offline and does not renew the lease.
Also suppose that the failover server becomes unavailable, either not reachable
from the primary or else it just fell over.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>When the lease expires, you see
the state change in the dhcpd.leases file on the primary:<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>lease 192.168.0.108 {<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> starts 3 2008/11/05
19:10:54;<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> ends 3 2008/11/05
19:40:54;<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> tstp 3 2008/11/05
19:55:54;<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> tsfp 3 2008/11/05
19:55:54;<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> cltt 3 2008/11/05
19:10:54;<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> binding state expired;<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> next binding state free;<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> hardware ethernet
c0:a8:c0:7c:00:09;<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'> client-hostname
"host-c0-a8-c0-7c-00-09";<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>}<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>If the failover is not available,
as mentioned above, then this lease will remain in this state (expired, next
state free) and not be available for new client requests.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>What is the expected behavior
here? Shouldn’t these leases eventually be freed? If not,
what is the proper procedure for making them available, assuming that the
failover box is out-of-commission for a long time? Note my previous post
about attempting to set “partner-down” state on the primary using
omshell, which doesn’t appear to accomplish the stated goal.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Thanks,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Greg<o:p></o:p></span></p>
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