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I have zero experience with dhcp failover, but I agree with Gero.
They should not both make offers.<br>
<br>
If they are both making offers, what is the point of configuring
them in failover? You might as well set them up independent of each
other and have them serve different pools.<br>
<br>
What am I missing?<br>
<br>
<div class="moz-cite-prefix">On 06/16/2015 08:18 AM, Gero Palacio
wrote:<br>
</div>
<blockquote
cite="mid:CAFpZj9NYpbe+As=RR51k7Q6R-PPsDZA1vq-8ok1RD-Sm11BRFg@mail.gmail.com"
type="cite">
<div dir="ltr">Hi There.<br>
<br>
<div>What I find odd is that according to section 5.3 of this
document <span
style="color:rgb(34,34,34);font-family:verdana,arial,helvetica,sans-serif;font-size:14px;line-height:20px;background-color:rgb(250,250,250)"> </span><a
moz-do-not-send="true"
href="https://tools.ietf.org/pdf/draft-ietf-dhc-failover-12.pdf"
target="_blank">IETF Internet Draft - DHCP Failover Protocol</a> <b>only
one</b> of the servers should respond to the DHCP offer. The
other should discard it.</div>
<div><br>
</div>
<div>I have tested this behavior with 2 computers connected on
the same subnet as the DHCP servers (so no relay agent
involved) and it works as described. Both servers receives the
offer but only one of them responds with an offer. This is
also back up by RFC <span
style="color:rgb(0,0,0);font-size:1em;line-height:normal">3074</span> <span
style="font-size:1em;line-height:0pt;color:rgb(0,0,0)"><a
moz-do-not-send="true"
href="https://tools.ietf.org/html/rfc3074" target="_blank">DHC
Load Balancing Algorithm</a>:</span></div>
<div><span
style="font-size:1em;line-height:0pt;color:rgb(0,0,0)"><br>
</span></div>
<blockquote style="margin:0 0 0 40px;border:none;padding:0px">
<div><span
style="font-size:1em;line-height:0pt;color:rgb(0,0,0)"><u>Section
4: </u></span></div>
The proposal maps the STID into a hash value using the
function in section 6. The resulting hash value can then be
used to decide who<br>
should respond to the request, or who the forwarding target
should be.<br>
</blockquote>
<div><br>
</div>
<div>So I don't why it's behaving the way it does when there's a
relay agent involved. </div>
<div><br>
</div>
<div>Thanks all for your help!</div>
<div>- Gerónimo.</div>
</div>
</blockquote>
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