[Kea-users] Prefix delegation

Fri Feb 6 10:09:31 UTC 2015

Mauro,

The fix for defining a pool for prefix delegation now on the master
branch. You can use https://github.com/isc-projects/kea/ to build the
latest greatest version of Kea and give it a try. It should accept the
prefix pools which don't match the subnet prefix.

Let me know how it goes...

Marcin

On 02/03/15 18:30, Mauro Gasparini wrote:
> Thanks Marcin.
> 
> It works with:
>     "subnet6": [
>         { "subnet": "2800:820:1::/52",
>           "pools": [ { "pool": "2800:820:1:1::228-2800:820:1:1::254" }
> ], "interface": "eth0" ,
>           "pools": [ { "pool": "2800:820:1:2::228-2800:820:1:2::254" }
> ], "interface": "eth0" ,
>           "pd-pools": [ { "prefix": "2800:820:1:100::", "prefix-len":
> 56, "delegated-len": 60 } ]
>         }
>     ]
> 
> I'll wait until next code review to test “pool” and “pd-pool” in
> different subnets.
> 
> Regards.
> 
> El 02/02/15 a las 12:27, kea-users-request at lists.isc.org escribió:
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>> Today's Topics:
>>
>>     1. Prefix delegation (Mauro Gasparini)
>>     2. Re: Prefix delegation (Marcin Siodelski)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Mon, 02 Feb 2015 12:11:00 -0300
>> From: Mauro Gasparini <mjgaspa at cablenet.com.ar>
>> To: kea-users at lists.isc.org
>> Subject: [Kea-users] Prefix delegation
>> Message-ID: <54CF9384.8010002 at cablenet.com.ar>
>> Content-Type: text/plain; charset="utf-8"; Format="flowed"
>>
>> Hi,
>> I would like to know if anyone has successfully configured prefix
>> delegation in dhcpv6.
>> In my case I'm trying to delegate network prefixes 2800:820:3::/56 to
>> customers that require it (without specifying any subnet in particular).
>>
>> *My kea setup is as follows:*
>>
>> # cat /etc/kea/kea.conf
>>
>> {
>> # DHCPv6 configuration starts on the next line
>> "Dhcp6": {
>>
>> # First we set up global values
>>       "interfaces": [ "eth0" ],
>>       "renew-timer": 1000,
>>       "rebind-timer": 2000,
>>       "preferred-lifetime": 3000,
>>       "valid-lifetime": 4000,
>>
>>                "option-data": [
>>                    {
>>                        "name": "dns-servers",
>>                        "code": 23,
>>                        "space": "dhcp6",
>>                        "csv-format": true,
>>                        "data": "2800:820:1:2::18"
>>                    }
>>           ],
>> # Next we specify the type of lease database
>>       "lease-database": {
>>           "type": "memfile",
>>           "persist": true,
>>       "name": "/usr/local/var/kea/kea-leases6.csv"
>>       },
>>
>> # Finally, we list the subnets from which we will be leasing addresses.
>>       "subnet6": [
>>           { "subnet": "2800:820:1:4::/64", "pools": [ { "pool":
>> "2800:820:1:4::228-2800:820:1:4::254" } ],"interface": "eth0" },
>>           { "subnet": "2800:820:3::/56",
>>               "pd-pools": [ { "prefix": "2800:820:3::", "prefix-len": 56,
>> "delegated-len": 60 } ],"interface": "eth0"
>>           }
>>       ]
>> },
>> # The following configures logging. It assumes that warning messages
>> # will be logged to stdout.
>> "Logging": {
>>       "loggers": [
>>           {
>>               "name": "kea-dhcp6",
>>               "output_options": [
>>                   {
>> #                    "output": "tdout"
>>                       "output": "/usr/local/var/kea/kea.log"
>>                   }
>>               ],
>>               "severity": "WARN"
>>           }
>>       ]
>> }
>>
>> # DHCPv6 configuration ends with the next line
>> }
>>
>> *In logs I see that it delivers a lease of IA_NA but it cannot deliver
>> IA_PD:*
>>
>> # tail /usr/local/var/kea/kea.log
>>
>> 2015-02-02 12:18:05.831 DEBUG [kea-dhcp6.dhcpsrv/30329]
>> DHCPSRV_CFGMGR_SUBNET6_IFACE selected subnet 2800:820:1:4::/64 for
>> packet received over interface eth0
>> 2015-02-02 12:18:05.831 DEBUG [kea-dhcp6.dhcpsrv/30329]
>> DHCPSRV_CFGMGR_SUBNET6_IFACE selected subnet 2800:820:1:4::/64 for
>> packet received over interface eth0
>> 2015-02-02 12:18:05.832 DEBUG [kea-dhcp6.dhcpsrv/30329]
>> DHCPSRV_CFGMGR_SUBNET6_IFACE selected subnet 2800:820:1:4::/64 for
>> packet received over interface eth0
>> 2015-02-02 12:18:05.832 DEBUG [kea-dhcp6.dhcp6/30329]
>> DHCP6_SUBNET_SELECTED the 2800:820:1:4::/64 subnet was selected for
>> client assignment
>> 2015-02-02 12:18:05.832 DEBUG [kea-dhcp6.dhcp6/30329]
>> DHCP6_PROCESS_IA_NA_REQUEST server is processing IA_NA option
>> (duid=00:01:00:01:1c:47:92:c6:00:19:21:78:c6:8d, iaid=1, hint=(no hint))
>> 2015-02-02 12:18:05.832 DEBUG [kea-dhcp6.dhcpsrv/30329]
>> DHCPSRV_MEMFILE_GET_IAID_SUBID_DUID obtaining IPv6 leases for IAID 1,
>> Subnet ID 1, DUID 00:01:00:01:1c:47:92:c6:00:19:21:78:c6:8d and lease
>> type IA_NA
>> 2015-02-02 12:18:05.832 DEBUG [kea-dhcp6.dhcpsrv/30329]
>> DHCPSRV_MEMFILE_GET_ADDR6 obtaining IPv6 lease for address
>> 2800:820:1:4::229 and lease type IA_NA
>> 2015-02-02 12:18:05.832 DEBUG [kea-dhcp6.dhcpsrv/30329]
>> DHCPSRV_MEMFILE_GET_ADDR6 obtaining IPv6 lease for address
>> 2800:820:1:4::229 and lease type IA_NA
>> 2015-02-02 12:18:05.832 DEBUG [kea-dhcp6.dhcp6/30329] DHCP6_LEASE_ADVERT
>> address lease 2800:820:1:4::229 advertised (client
>> duid=00:01:00:01:1c:47:92:c6:00:19:21:78:c6:8d, iaid=1)
>> 2015-02-02 12:18:05.832 DEBUG [kea-dhcp6.dhcp6/30329]
>> DHCP6_PROCESS_IA_PD_REQUEST server is processing IA_PD option
>> (duid=00:01:00:01:1c:47:92:c6:00:19:21:78:c6:8d, iaid=1, hint=(no hint))
>> 2015-02-02 12:18:05.832 DEBUG [kea-dhcp6.dhcpsrv/30329]
>> DHCPSRV_MEMFILE_GET_IAID_SUBID_DUID obtaining IPv6 leases for IAID 1,
>> Subnet ID 1, DUID 00:01:00:01:1c:47:92:c6:00:19:21:78:c6:8d and lease
>> type IA_PD
>> 2015-02-02 12:18:05.832 ERROR [kea-dhcp6.dhcpsrv/30329]
>> DHCPSRV_ADDRESS6_ALLOC_ERROR error during attempt to allocate an IPv6
>> address: No pools defined in selected subnet
>> 2015-02-02 12:18:05.832 DEBUG [kea-dhcp6.dhcp6/30329]
>> DHCP6_PD_LEASE_ADVERT_FAIL failed to advertise a prefix lease for client
>> duid=00:01:00:01:1c:47:92:c6:00:19:21:78:c6:8d, iaid=1
>> 2015-02-02 12:18:05.833 DEBUG [kea-dhcp6.dhcp6/30329]
>> DHCP6_RESPONSE_DATA responding with packet type 2 data is
>> localAddr=[ff02::1:2]:547 remoteAddr=[fe80::2e0:4cff:fe0c:19fd]:546
>> msgtype=2, transid=0x80e1c
>> type=1, len=14: 00:01:00:01:1c:47:92:c6:00:19:21:78:c6:8d
>> type=2, len=14: 00:01:00:01:1c:22:ed:15:00:01:2e:2a:02:fa
>> type=3(IA_NA) iaid=1, t1=1000, t2=2000 1 sub-options:
>>     type=5(IAADDR) addr=2800:820:1:4::229, preferred-lft=3000,
>> valid-lft=4000
>>
>> type=23 1addr(s): 2800:820:1:2::18
>> type=25(IA_PD) iaid=1, t1=0, t2=0 1 sub-options:
>>     type=13, len=40, data fields:
>>       #0 6 ( uint16 )
>>       #1 Sorry, no prefixes could be allocated. ( string )
>>
>> 2015-02-02 12:18:05.833 DEBUG [kea-dhcp6.dhcp6/30329]
>> DHCP6_RESPONSE_DATA responding with packet type 2 data is
>> localAddr=[ff02::1:2]:547 remoteAddr=[fe80::2e0:4cff:fe0c:19fd]:546
>> msgtype=2, transid=0x80e1c
>> type=1, len=14: 00:01:00:01:1c:47:92:c6:00:19:21:78:c6:8d
>> type=2, len=14: 00:01:00:01:1c:22:ed:15:00:01:2e:2a:02:fa
>> type=3(IA_NA) iaid=1, t1=1000, t2=2000 1 sub-options:
>>     type=5(IAADDR) addr=2800:820:1:4::229, preferred-lft=3000,
>> valid-lft=4000
>>
>> type=23 1addr(s): 2800:820:1:2::18
>> type=25(IA_PD) iaid=1, t1=0, t2=0 1 sub-options:
>>     type=13, len=40, data fields:
>>       #0 6 ( uint16 )
>>       #1 Sorry, no prefixes could be allocated. ( string )
>>
>> 2015-02-02 12:18:06.839 DEBUG [kea-dhcp6.dhcp6/30329]
>> DHCP6_PACKET_RECEIVED REQUEST packet received
>> 2015-02-02 12:18:06.840 DEBUG [kea-dhcp6.dhcp6/30329] DHCP6_QUERY_DATA
>> received packet length 3, data length 0, data is localAddr=[ff02::1:2]:0
>> remoteAddr=[fe80::2e0:4cff:fe0c:19fd]:546
>> msgtype=3, transid=0x22c8ee
>> type=1, len=14: 00:01:00:01:1c:47:92:c6:00:19:21:78:c6:8d
>> type=2, len=14: 00:01:00:01:1c:22:ed:15:00:01:2e:2a:02:fa
>> type=3(IA_NA) iaid=1, t1=4294967295, t2=4294967295 1 sub-options:
>>     type=5(IAADDR) addr=2800:820:1:4::229, preferred-lft=3000,
>> valid-lft=4000
>>
>> type=6, len=2:
>> type=8, len=2:
>> type=25(IA_PD) iaid=1, t1=4294967295, t2=4294967295 0 sub-options:
>>
>> *Server IP conf is:*
>>
>> # ip -6 addr list
>> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436
>>       inet6 ::1/128 scope host
>>          valid_lft forever preferred_lft forever
>> 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
>>       inet6 2800:820:1:4::1/64 scope global
>>          valid_lft forever preferred_lft forever
>>       inet6 fe80::201:2eff:fe2a:2fa/64 scope link
>>          valid_lft forever preferred_lft forever
>>
>>
> 
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