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<div class="moz-cite-prefix">On 15/04/2019 18.48, Murali Krishna
wrote:<br>
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<blockquote type="cite"
cite="mid:CAKhvxa0CDk9AdLCTS-Lyc_bReJk5wRD=p1V6OsSdDv5=nPmWrQ@mail.gmail.com">
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<div dir="ltr">Hi,
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<div>Im facing issue with the dhcp lease time. </div>
<div>Im having two different DHCP versions in server
and client side. I could see that the lease file
at the client had very huge value of the dhcp
lease.</div>
<div><br>
</div>
<div>version on the server side:</div>
<div>isc-dhcpd-4.3.6-P1<br>
</div>
<div><br>
</div>
<div>Version on the client side:</div>
<div>isc-dhcpd-4.2.1-P1<br>
</div>
<div><br>
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<div>Content(part) of the lease file at the client
side:</div>
<div>dhcp-lease-time <span
style="color:rgb(72,72,72);font-family:Verdana,sans-serif;font-size:9pt">152292816</span>;</div>
<div><br>
Output of pcap file used for debugging:</div>
<div>
<ul style="margin-bottom:0cm" type="disc">
<li class="MsoNormal"
style="color:rgb(72,72,72);margin:0cm 0cm
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span
style="font-size:9pt;font-family:Verdana,sans-serif" lang="EN-US"><a
href="https://gordon.advantech.com.tw/issues/28"
title="It shall be possible to upgrade all
embedded software to the unit in a time
less than 15 minutes. (Deferred)"
style="color:rgb(5,99,193)"
moz-do-not-send="true">#28</a>: Client
sends "DHCP Request" to server and asks the
lease time 3600s. </span></li>
<li class="MsoNormal"
style="color:rgb(72,72,72);margin:0cm 0cm
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span
style="font-size:9pt;font-family:Verdana,sans-serif" lang="EN-US"><a
href="https://gordon.advantech.com.tw/issues/29"
title="An ATCA Blade FRUcontaining
embedded SW/FW components shall support an
HPI FUMI interface, per co... (Closed)"
style="color:rgb(5,99,193)"
moz-do-not-send="true">#29</a>: The server
replies the "DHCP ACK" to client, but the
lease time is 152292816s. <br>
</span></li>
</ul>
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</blockquote>
The server is configured with two times, max-lease-time and
default-lease-time. It will send those times to the client, in this
case it looks like the server is configured to send very long times
(4.8 years). It is up to the client when it wants to renew the
lease, the 3600s is clearly within the bounds of what it is given.<br>
<br>
If you want shorter lease times, the server needs to be configured
to hand out those times instead.<br>
<blockquote type="cite"
cite="mid:CAKhvxa0CDk9AdLCTS-Lyc_bReJk5wRD=p1V6OsSdDv5=nPmWrQ@mail.gmail.com">
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<div>Please help in getting this resolved. Also
please share in what kind of situations the
server will respond to the client with a huge
lease value.</div>
<div><br>
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Thanks & Regards,<br>
Muralikrishna CH<br>
<br>
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