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<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif">Hello Team,<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif"><span> </span></p>

<pre style="margin:0cm 0cm 0.0001pt;font-size:10pt;font-family:"Courier New""><span style="font-size:11pt;font-family:"Calibri",sans-serif">I am working on a problem with my ISC DCHP Version 4.4 server for IPv6 from last few days, But I could not found a solution or root cause. So I hope someone could help me.<span></span></span></pre>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif"><span> </span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif">Problem : server not responding with IP details for relay
request with selection of class option [ option 18].<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif">It works fine when we comment out on class condition. <span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif">From wireshark print, This interface id will inserted by an
relay agent [ “TESTING;”]. <span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif"><span> </span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif">Please guide us how to collect debug logs with debug enable
or any configuration error or installation steps. Platform is Centos7. <span> </span><span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif"><span> </span><span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif">Configuration file<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif">[root@localhost dhcp]# cat dhcpd6.conf<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif">#<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif"># DHCPv6 Server Configuration
file.<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif">#<span>   </span>see /usr/share/doc/dhcp*/dhcpd6.conf.example<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif">#<span>   </span>see dhcpd.conf(5) man page<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif"><span> </span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif">authoritative;<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif"><span> </span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif">default-lease-time 86400;<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif">max-lease-time 86400;<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif"><span> </span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif">allow leasequery;<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif">log-facility local7;<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif"><span> </span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif">class "team" {<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif"><span>         </span>match if substring (option
dhcp6.interface-id, 0, 8) = "TESTING;";<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif">}<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif"><span> </span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif">subnet6 3001:db8:100:f101::0/64
{<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif"><span> 
</span>pool6 {<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif"><span>    </span>log(info, option dhcp6.interface-id);<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif"><span>    </span>range6 3001:db8:100:f101::0:100
3001:db8:100:f101::0:1FF;<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif"><span>    </span>allow members of "team";<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif"><span> 
</span>}<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 108pt;font-size:11pt;font-family:"Calibri",sans-serif">}<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif"><span> </span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif">[root@localhost dhcp]#<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif"><span> </span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif">[root@localhost /]# /usr/local/sbin/dhcpd -6 -d -lf
/var/db/dhcp.leases -cf /etc/dhcp/dhcpd6.conf eno1<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 72pt;font-size:11pt;font-family:"Calibri",sans-serif">Internet Systems Consortium DHCP
Server 4.4.1<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 72pt;font-size:11pt;font-family:"Calibri",sans-serif">Copyright 2004-2018 Internet
Systems Consortium.<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 72pt;font-size:11pt;font-family:"Calibri",sans-serif">All rights reserved.<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 72pt;font-size:11pt;font-family:"Calibri",sans-serif">For info, please visit
<a href="https://www.isc.org/software/dhcp/">https://www.isc.org/software/dhcp/</a><span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 72pt;font-size:11pt;font-family:"Calibri",sans-serif">Config file:
/etc/dhcp/dhcpd6.conf<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 72pt;font-size:11pt;font-family:"Calibri",sans-serif">Database file:
/var/db/dhcp.leases<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 72pt;font-size:11pt;font-family:"Calibri",sans-serif">PID file: /var/run/dhcpd6.pid<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 72pt;font-size:11pt;font-family:"Calibri",sans-serif">Wrote 0 class decls to leases
file.<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 72pt;font-size:11pt;font-family:"Calibri",sans-serif">Wrote 0 NA, 0 TA, 0 PD leases to
lease file.<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 72pt;font-size:11pt;font-family:"Calibri",sans-serif">Bound to *:547<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 72pt;font-size:11pt;font-family:"Calibri",sans-serif">Listening on
Socket/5/eno1/3001:db8:100:f101::/64<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 72pt;font-size:11pt;font-family:"Calibri",sans-serif">Sending on<span>   </span>Socket/5/eno1/3001:db8:100:f101::/64<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 72pt;font-size:11pt;font-family:"Calibri",sans-serif">Server starting service.<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 72pt;font-size:11pt;font-family:"Calibri",sans-serif">Relay-forward message from
3001:db8:100:f101:62a8:feff:feab:5500 port 547, link address
3001:db8:100:f101:62a8:feff:feab:5500, peer address fe80::208:2ff:fe01:1<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 72pt;font-size:11pt;font-family:"Calibri",sans-serif"><b>Unable to pick client address: no addresses available</b><span>  </span>- shared network 3001:db8:100:f101::/64: 0 total,
0 active,<span>  </span>0 abandoned<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 72pt;font-size:11pt;font-family:"Calibri",sans-serif">Sending Relay-reply to
3001:db8:100:f101:62a8:feff:feab:5500 port 547<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 72pt;font-size:11pt;font-family:"Calibri",sans-serif">Relay-forward message from
3001:db8:100:f101:62a8:feff:feab:5500 port 547, link address
3001:db8:100:f101:62a8:feff:feab:5500, peer address fe80::208:2ff:fe01:1<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 72pt;font-size:11pt;font-family:"Calibri",sans-serif"><b>Unable to pick client address: no addresses available</b><span>  </span>- shared network 3001:db8:100:f101::/64: 0
total, 0 active,<span>  </span>0 abandoned<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt 72pt;font-size:11pt;font-family:"Calibri",sans-serif">Sending Relay-reply to
3001:db8:100:f101:62a8:feff:feab:5500 port 547<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif"><span> </span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif">Wireshark Logs attached:<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif"><span><img width="598" height="263"></span><span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif"><span> </span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif">Let us know any further information required, we are doing
first time with IPv6. IPv4 is fine and class options are working.<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif"><span> </span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif">Thanks<span></span></p>

<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:"Calibri",sans-serif">Guru<span></span></p>





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