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The DHCP requests come through a DSLAM which injects the option 82
info.<br>
<br>
<div class="moz-cite-prefix">On 06/09/2015 10:40 AM, perl-list
wrote:<br>
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cite="mid:24103828.214677.1433871603178.JavaMail.zimbra@network1.net"
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<div style="font-family: Andale Mono; font-size: 10pt; color:
#000000">Question ... I noticed option 82 information in your
packet dump. How is that ending up in there?</div>
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<div style="font-family: Andale Mono; font-size: 10pt; color:
#000000">The packet dump doesn't appear to show a relay agent
in play, so option 82 shouldn't exist...<br>
<br>
<hr id="zwchr" data-marker="__DIVIDER__">
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<blockquote style="border-left:2px solid
#1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><b>From:
</b>"Sean McMurray" <a class="moz-txt-link-rfc2396E" href="mailto:sean@mvtel.com"><sean@mvtel.com></a><br>
<b>To: </b>"Users of ISC DHCP"
<a class="moz-txt-link-rfc2396E" href="mailto:dhcp-users@lists.isc.org"><dhcp-users@lists.isc.org></a><br>
<b>Sent: </b>Tuesday, June 9, 2015 1:30:13 PM<br>
<b>Subject: </b>Re: dhcpd doesn't acknowledge dhcp
requests<br>
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#1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;">I
have stripped dhcpd.conf all the way down to this:<br>
<br>
log-facility local6;<br>
<br>
subnet 10.112.0.0 netmask 255.248.0.0 {<br>
option routers 10.112.0.1;<br>
pool {<br>
range 10.112.1.0 10.112.255.255;<br>
}<br>
}<br>
<br>
I have disabled SELinux. I have disabled iptables.<br>
I have purged the leasefile.<br>
Still, dhcpd does not respond to DHCPDISCOVERs.<br>
<br>
<br>
On 06/08/2015 03:21 PM, Peter Rathlev wrote:<br>
> On Fri, 2015-06-05 at 14:49 -0700, Sean McMurray
wrote:<br>
>> strace shows the daemon receiving requests but
not responding.<br>
>> I'm stumped as to why it won't respond.<br>
> That certainly seems strange. Have you tried removing
the log statements<br>
> completely? I would call it a bug if that changes
anything, but it would<br>
> be easy to try.<br>
><br>
> With the stock CentOS 7 package it should not be
SELinux related, unless<br>
> there was an error in the definitions. However, could
you try disabling<br>
> SELinux if you haven't already?<br>
><br>
> Other than that I can only think of starting the
daemon with a trace<br>
> file (-tf flag), which should let someone with
adequate skills figure<br>
> out exactly what happens inside the process.<br>
><br>
<br>
<br>
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