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<p class="MsoNormal"><span style="color:#1F497D">Hi all,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"> I would like to know the IETF draft number for DHCPv6 failover support so that i can refer the document.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Ameen S<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:
"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;
font-family:"Tahoma","sans-serif""> dhcp-users-bounces+ameen.shajahan=wipro.com@lists.isc.org
[mailto:dhcp-users-bounces+ameen.shajahan=wipro.com@lists.isc.org] <b>On Behalf Of
</b>perl-list<br>
<b>Sent:</b> 09 April 2012 18:30<br>
<b>To:</b> Users of ISC DHCP<br>
<b>Subject:</b> Re: DHCPv6 query<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Andale Mono","serif";
color:black">In the test-case that you setup, the client is going to accept whichever packet gets there first. It could have just as easily got a packet from server 2 if
that packet had arrived first. If you shut of server 1 long enough that the client's lease runs out, it will get an address from server 2. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Andale Mono","serif";
color:black"><o:p> </o:p></span></p>
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<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt;
font-family:"Andale Mono","serif";color:black">There is no failover support yet in DHCPv6 (although there is a draft for it that is currently worming its way through the IETF).
If you have a relay agent in the middle, you can set priorities on which server should have preference etc...<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Andale Mono","serif";
color:black"><o:p> </o:p></span></p>
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<blockquote style="border:none;border-left:solid #1010FF 1.5pt;padding:0cm 0cm 0cm 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><b><span style="font-family:"Helvetica","sans-serif";
color:black">From:
</span></b><span style="font-family:"Helvetica","sans-serif";
color:black">"ameen shajahan" <ameen.shajahan@wipro.com><br>
<b>To: </b>dhcp-users@lists.isc.org<br>
<b>Sent: </b>Monday, April 9, 2012 5:59:37 AM<br>
<b>Subject: </b>DHCPv6 query<br>
<br>
<br>
</span><span style="font-size:12.0pt;font-family:"Helvetica","sans-serif";
color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Hi all,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> I need clarification for a below output.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> Consider the scenario, I have run two dhcpv6 servers in two different eservers.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> Server1 subnet is </span>
<span style="color:red"> 3ffe:501:ffff:105::15</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:red"> </span><span style="color:black">Server2 subnet is</span><span style="color:red"> 3ffe:501:ffff:116::15</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:red"> </span><span style="color:black">These two servers connected to 1 switch , from that switch its connected to Windows7PC(client)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span lang="EN-US" style="color:black"> Cisco switch</span><span style="color:black"><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Helvetica","sans-serif";
color:black"> <o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span lang="EN-US" style="color:black">Client(Windows7PC)</span><span style="color:black"><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Helvetica","sans-serif";
color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><img width="118" height="12" id="_x0000_i1026" src="cid:image001.png@01CD18D0.2CDE9020"><img width="121" height="12" id="_x0000_i1027" src="cid:image002.png@01CD18D0.2CDE9020"> DHCPV6 server1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><img width="121" height="12" id="_x0000_i1028" src="cid:image003.png@01CD18D0.2CDE9020"> DHCPv6 server 2
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> Ran the two servers at a sametime , Client got the IPv6 address in the subnet range</span><span style="color:red">3ffe:501:ffff:105::15 not in 3ffe:501:ffff:116::15</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:red"> </span><span style="color:black">Then I stopped both the server , restarted both the servers again.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> Again Client getting the IPv6 address in the range 3ffe:501:ffff:105::14 not in 3ffe:501:ffff:116::15<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> Conceptuall it could be correct , because client get a single IP address at a time.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> I would like to know , why its not assigning to this range(3ffe:501:ffff:116::15) eventhough I restarted both the servers 4 to 5 times.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> Is there any priority following for assigning IPv6 address.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> What could be the reason .<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> Please let me know.<o:p></o:p></span></p>
<div style="border:none;border-bottom:double windowtext 2.25pt;padding:0cm 0cm 1.0pt 0cm">
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="color:black">Output 1(IP assigned output)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Jan 13 03:22:30 ameen daemon.info dhcpd: Solicit message from fe80::c8b0:62f6:fd72:7074 port 546, transaction ID 0xDCE659<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Jan 13 03:22:30 ameen daemon.debug dhcpd:
</span><span style="color:red">Picking pool address 3ffe:501:ffff:105::15</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Jan 13 03:22:30 ameen daemon.info dhcpd: Sending Advertise to fe80::c8b0:62f6:fd72:7074 port 546<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Jan 13 03:22:31 ameen daemon.info dhcpd: Request message from fe80::c8b0:62f6:fd72:7074 port 546, transaction ID 0xDCE659<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Jan 13 03:22:31 ameen daemon.info dhcpd: Sending Reply to fe80::c8b0:62f6:fd72:7074 port 546<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Jan 13 03:23:25 ameen daemon.info dhcpd: Release message from fe80::c8b0:62f6:fd72:7074 port 546, transaction ID 0x74B40B<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Jan 13 03:23:25 ameen daemon.info dhcpd: Client 00:01:00:01:14:d3:bd:62:90:fb:a6:ec:74:35 releases address 3ffe:501:ffff:105::15, which is not leased to it.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Jan 13 03:23:25 ameen daemon.info dhcpd: Sending Reply to fe80::c8b0:62f6:fd72:7074 port 546<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<div style="border:none;border-bottom:double windowtext 2.25pt;padding:0cm 0cm 1.0pt 0cm">
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="color:black">Output2(unassigned IP output)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">feb 20 03:56:05 ameen daemon.info dhcpd: Solicit message from fe80::c8b0:62f6:fd72:7074 port 546, transaction ID 0xDCE659<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Feb 20 03:56:05 ameen daemon.debug dhcpd:
</span><span style="color:red">Picking pool address 3ffe:501:ffff:116::15</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Feb 20 03:56:05 ameen daemon.info dhcpd: Sending Advertise to fe80::c8b0:62f6:fd72:7074 port 546<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Feb 20 03:56:06 ameen daemon.notice dhcpd: SFR: Init = 1C71 UP = 9C95 LOW = 9C4C<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Feb 20 03:56:06 ameen daemon.info dhcpd: Request message from fe80::c8b0:62f6:fd72:7074 port 546, transaction ID 0xDCE659<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Feb 20 03:56:06 ameen daemon.debug dhcpd:
</span><span style="color:red">Discarding Request from fe80::c8b0:62f6:fd72:7074; not our server identifier (CLIENTID</span><span style="color:black"> 00:01:00:01:14:d3:bd:62:90:fb:a6:ec:74:35, SERVERID 00:01:00:01:16:a2:5f:70:00:60:43:60:ca:99, server DUID
00:01:00:01:16:d4:80:52:00:60:43:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Feb 20 03:56:17 ameen daemon.notice dhcpd: SFR: Init = 1C71 UP = 9C95 LOW = 9C4C<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Feb 20 03:57:01 ameen daemon.info dhcpd: Release message from fe80::c8b0:62f6:fd72:7074 port 546, transaction ID 0x74B40B<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Feb 20 03:57:01 ameen daemon.debug dhcpd:
</span><span style="color:red">Discarding Release from fe80::c8b0:62f6:fd72:7074; not our server identifier (CLIENTID</span><span style="color:black"> 00:01:00:01:14:d3:bd:62:90:fb:a6:ec:74:35, SERVERID 00:01:00:01:16:a2:5f:70:00:60:43:60:ca:99, server DUID
00:01:00:01:16:d4:80:52:00:60:43:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Feb 20 03:57:12 ameen daemon.notice dhcpd: SFR: Init = 1C71 UP = 9C95 LOW = 9C4C<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Ameen S<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
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