IPv6 prefix assignment problem

[Bill Shirley]

As I see it, you have no restrictions on either subnet so DHCP is
free to allocate from either one.

Bill


On 1/25/2018 10:22 AM, Peter Balsianok wrote:
> Hi,
>
> We have following configuration for ISC DHCPv6:
>
> omapi-port 8913;
> ddns-update-style none;
> ping-check off;
> authoritative;
> default-lease-time 604800;
> max-lease-time 604800;
> log-facility local3;
> preferred-lifetime 259200;
> option dhcp6.info-refresh-time 129600;
> option dhcp6.aftr-name code 64 = string;
>
> deny duplicates;
> one-lease-per-client on;
>
> #dhcp01
> subnet6 2a01:c840:110:8004::229/128 {
> }
> subnet6 2a01:c840:110:8004::230/128 {
> }
> subnet6 2a01:c840:110:8004::228/128 {
> }
> #dhcp02
> subnet6 2a01:c840:130:8004::20/128 {
> }
> subnet6 2a01:c840:130:8004::21/128 {
> }
> subnet6 2a01:c840:130:8004::19/128 {
> }
>
> #testovaci subnet 1
> subnet6 2a01:c840:50:5000::/62 {
>   prefix6 2a01:c840:0050:2000:: 2a01:c840:0050:2300:: /56;
>   #prefix6 2a01:c840:0050:2400:: 2a01:c840:0050:2700:: /56; #dedicated for static assigement
>   # Additional options
>   # aftr je aftr2.auro.orange.sk <http://aftr2.auro.orange.sk>
>   option dhcp6.aftr-name 05:61:66:74:72:32:04:61:75:72:6f:06:6f:72:61:6e:67:65:02:73:6b:00;
>   option dhcp6.name-servers 2a01:c840:130:c000::10, 2a01:c840:110:c000::10;
> }
>
> #test subnet2
>  subnet6 2a01:c840:0070:0140::/64 {
>    prefix6 2A01:C846:140:: 2A01:C846:17F:F000:: /56;
>    # N-005-BA-OLT-02
>    option dhcp6.aftr-name 61:61:66:74:72:32:2e:61:75:72:6f:2e:6f:72:61:6e:67:65:2e:73:6b ;
>    # aaftr2.auro.orange.sk <http://aaftr2.auro.orange.sk>
>    option dhcp6.name-servers 2a01:c840:110:c000::10 , 2a01:c840:130:c000::10 ;
>  }
>
> I am testing following scenarion:
> - two relay agent exists (one for subnet1 and second from subnet 2)
> - i try to migrate device from subnet2 into subnet1. I suppose that i will get another prefix delegation. But as you can see 
> in the debug messages, it doesnt work.
>
> Could you help me please? Thx
>
>
>
> Here are log messages:
> 20180125155309 dhcp01 dhcpd-zk-inet: Internet Systems Consortium DHCP Server 4.3.6
> 20180125155309 dhcp01 dhcpd-zk-inet: Copyright 2004-2017 Internet Systems Consortium.
> 20180125155309 dhcp01 dhcpd-zk-inet: All rights reserved.
> 20180125155309 dhcp01 dhcpd-zk-inet: For info, please visit https://www.isc.org/software/dhcp/
> 20180125155309 dhcp01 dhcpd-zk-inet: Wrote 0 deleted host decls to leases file.
> 20180125155309 dhcp01 dhcpd-zk-inet: Wrote 0 new dynamic host decls to leases file.
> 20180125155309 dhcp01 dhcpd-zk-inet: Wrote 0 NA, 0 TA, 1 PD leases to lease file.
> 20180125155309 dhcp01 dhcpd-zk-inet: Bound to *:547
> 20180125155309 dhcp01 dhcpd-zk-inet: Listening on Socket/5/zk-inet0/2a01:c840:110:8004::228/128
> 20180125155309 dhcp01 dhcpd-zk-inet: Sending on Socket/5/zk-inet0/2a01:c840:110:8004::228/128
> 20180125155309 dhcp01 dhcpd-zk-inet: Server starting service.
> 20180125155311 dhcp01 dhcpd-zk-inet: Relay-forward message from 2a01:c840:70:140::1 port 547, link address 
> 2a01:c840:70:140::1, peer address fe80::427d:fff:fe99:4727
> 20180125155311 dhcp01 dhcpd-zk-inet: Picking pool prefix 2a01:c846:17f:f000::/56
> 20180125155311 dhcp01 dhcpd-zk-inet: Advertise PD: address 2a01:c846:17f:f000::/56 to client with duid 
> 00:03:00:01:40:7d:0f:99:47:27 iaid = 0 valid for 604800 seconds
> 20180125155311 dhcp01 dhcpd-zk-inet: Sending Relay-reply to 2a01:c840:70:140::1 port 547
> 20180125155312 dhcp01 dhcpd-zk-inet: Relay-forward message from 2a01:c840:70:140::1 port 547, link address 
> 2a01:c840:70:140::1, peer address fe80::427d:fff:fe99:4727
> 20180125155312 dhcp01 dhcpd-zk-inet: Reply PD: address 2a01:c846:17f:f000::/56 to client with duid 
> 00:03:00:01:40:7d:0f:99:47:27 iaid = 0 valid for 604800 seconds
> 20180125155312 dhcp01 dhcpd-zk-inet: Sending Relay-reply to 2a01:c840:70:140::1 port 547
> 20180125160001 dhcp01 dhcpd-zk-inet: Relay-forward message from 2a01:c840:70:140::1 port 547, link address 
> 2a01:c840:70:140::1, peer address fe80::427d:fff:fe99:4727
> 20180125160001 dhcp01 dhcpd-zk-inet: Advertise PD: address 2a01:c846:17f:f000::/56 to client with duid 
> 00:03:00:01:40:7d:0f:99:47:27 iaid = 0 valid for 604800 seconds
> 20180125160001 dhcp01 dhcpd-zk-inet: Sending Relay-reply to 2a01:c840:70:140::1 port 547
> 20180125160002 dhcp01 dhcpd-zk-inet: Relay-forward message from 2a01:c840:70:140::1 port 547, link address 
> 2a01:c840:70:140::1, peer address fe80::427d:fff:fe99:4727
> 20180125160002 dhcp01 dhcpd-zk-inet: Reply PD: address 2a01:c846:17f:f000::/56 to client with duid 
> 00:03:00:01:40:7d:0f:99:47:27 iaid = 0 valid for 604800 seconds
> 20180125160002 dhcp01 dhcpd-zk-inet: Sending Relay-reply to 2a01:c840:70:140::1 port 547
> 20180125160129 dhcp01 dhcpd-zk-inet: Relay-forward message from 2a01:c840:50:5001::1 port 547, link address 
> 2a01:c840:50:5001::1, peer address fe80::427d:fff:fe99:4727
> 20180125160129 dhcp01 dhcpd-zk-inet: Advertise PD: address 2a01:c846:17f:f000::/56 to client with duid 
> 00:03:00:01:40:7d:0f:99:47:27 iaid = 0 valid for 604800 seconds
> 20180125160129 dhcp01 dhcpd-zk-inet: Sending Relay-reply to 2a01:c840:50:5001::1 port 547
> 20180125160130 dhcp01 dhcpd-zk-inet: Relay-forward message from 2a01:c840:50:5001::1 port 547, link address 
> 2a01:c840:50:5001::1, peer address fe80::427d:fff:fe99:4727
> 20180125160130 dhcp01 dhcpd-zk-inet: Reply PD: address 2a01:c846:17f:f000::/56 to client with duid 
> 00:03:00:01:40:7d:0f:99:47:27 iaid = 0 valid for 604800 seconds
> 20180125160130 dhcp01 dhcpd-zk-inet: Sending Relay-reply to 2a01:c840:50:5001::1 port 547
>
>
>
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