IPv6 prefix assignment problem

[Peter Balsianok]

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
  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
   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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