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<p class="MsoNormal"><span lang="IT">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT">I have a doubt, but it is creating problems for some clients.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">The scenario is as follows:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT">I have two failover servers with version 4.2.1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT">A client sends a DHCPDISCOVER broadcast to two servers<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT">Only one server sends DHCPOFFER<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT">Both servers receives the DHCPREQUEST (where client specify the server choosed)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">Nevertheless both servers sends a DHCPACK (with the same IP but with different ID servers), this means that if the client get a<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT">DHCP ACK from the server that had not chosen, that is with a different ID servers, the client begins again with the process of DISCOVER<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">I would understand if is this behavior RFC or "draft-ietf-dhc-failover-12” compliant?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT">Why I have not found anything explaining , someone can answer to my question is very important!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">Follow DHCP log file<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">secondary server:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">Oct 25 11:43:00 isc-d02 dhcpd: DHCPDISCOVER from 06:d0:d6:0f:c6:88 via 10.200.124.1: load balance to peer DHCP-IMS-Failover<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">Oct 25 11:43:01 isc-d02 dhcpd: DHCPREQUEST for 10.200.125.125 (10.221.2.225) from 06:d0:d6:0f:c6:88 via 10.200.124.1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">Oct 25 11:43:01 isc-d02 dhcpd: DHCPACK on 10.200.125.125 to 06:d0:d6:0f:c6:88 via 10.200.124.1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">Oct 25 11:43:01 isc-d02 dhcpd: bind update on 10.200.125.125 from DHCP-IMS-Failover rejected: incoming update is less critical than outgoing update<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT">...<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">Oct 25 11:44:46 isc-d02 dhcpd: DHCPDISCOVER from 06:d0:d6:0f:c6:88 via 10.200.124.1: load balance to peer DHCP-IMS-Failover<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">Oct 25 11:44:47 isc-d02 dhcpd: bind update on 10.165.81.127 from DHCP-IMS-Failover rejected: incoming update is less critical than outgoing update<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">Oct 25 11:44:47 isc-d02 dhcpd: DHCPREQUEST for 10.200.125.125 (10.221.2.225) from 06:d0:d6:0f:c6:88 via 10.200.124.1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">Oct 25 11:44:47 isc-d02 dhcpd: DHCPACK on 10.200.125.125 to 06:d0:d6:0f:c6:88 via 10.200.124.1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">Oct 25 11:44:47 isc-d02 dhcpd: bind update on 10.200.125.125 from DHCP-IMS-Failover rejected: incoming update is less critical than outgoing update<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">----------------------------------------<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">primary server:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">Oct 25 11:43:00 isc-d01 dhcpd: DHCPDISCOVER from 06:d0:d6:0f:c6:88 via 10.200.124.1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">Oct 25 11:43:01 isc-d01 dhcpd: DHCPOFFER on 10.200.125.125 to 06:d0:d6:0f:c6:88 via 10.200.124.1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">Oct 25 11:43:01 isc-d01 dhcpd: DHCPREQUEST for 10.200.125.125 (10.221.2.225) from 06:d0:d6:0f:c6:88 via 10.200.124.1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">Oct 25 11:43:01 isc-d01 dhcpd: DHCPACK on 10.200.125.125 to 06:d0:d6:0f:c6:88 via 10.200.124.1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT">...<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">Oct 25 11:44:46 isc-d01 dhcpd: DHCPDISCOVER from 06:d0:d6:0f:c6:88 via 10.200.124.1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">Oct 25 11:44:47 isc-d01 dhcpd: DHCPOFFER on 10.200.125.125 to 06:d0:d6:0f:c6:88 via 10.200.124.1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">Oct 25 11:44:47 isc-d01 dhcpd: DHCPREQUEST for 10.200.125.125 (10.221.2.225) from 06:d0:d6:0f:c6:88 via 10.200.124.1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="IT">Oct 25 11:44:47 isc-d01 dhcpd: DHCPACK on 10.200.125.125 to 06:d0:d6:0f:c6:88 via 10.200.124.1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Futura Hv","sans-serif";color:#221E1F"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Futura Hv","sans-serif";color:#221E1F"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Futura Hv","sans-serif";color:#221E1F">Best Regards<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Futura Hv","sans-serif";color:#221E1F">Domenico Costantino</span><span style="font-size:10.0pt;font-family:"Futura Bk","sans-serif";color:#221E1F"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Futura Bk","sans-serif";color:#221E1F">Technical Consultant, EB SWCM Delivery<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Futura Bk","sans-serif";color:#221E1F">Hewlett-Packard Company<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Futura Bk","sans-serif";color:#221E1F">domenico.costantino@hp.com / Email
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Futura Bk","sans-serif";color:#221E1F">Via Achille Campanile, 85
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Futura Bk","sans-serif";color:#221E1F">00144, Roma
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Futura Bk","sans-serif";color:#221E1F">ITALY<o:p></o:p></span></p>
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