[Kea-users] Kea-dhcp6 always warns with ALLOC_ENGINE_V6_ALLOC_FAIL_SUBNET when allocating reserved address

[Bob Harold]

On Thu, Jan 4, 2024 at 12:10 PM Andrew Rowson via Kea-users <
kea-users at lists.isc.org> wrote:

> Hi,
>
> I'm using isc-kea-dhcp6 (2.4.1-isc20231123184533) on Debian bookworm and
> am having a minor logging issue. I've got a minimal config that defines a
> single subnet, an allocatable pool within that subnet and a single
> reservation.
>
> The host gets its reserved IP successfully, but there's always a WARN log
> dance in the kea logs with ALLOC_ENGINE_V6_ALLOC_FAIL_SUBNET,
> ALLOC_ENGINE_V6_ALLOC_FAIL_NO_POOLS and ALLOC_ENGINE_V6_ALLOC_FAIL_CLASSES.
>
> Are these warnings expected, or have I misunderstood something about the
> configuration?
>
> Thanks,
> Andrew
>
> Config:
>
>     {
>         "Dhcp6": {
>             "interfaces-config": {
>                 "interfaces": [
>                     "enp1s0.2",
>                 ]
>             },
>             "lease-database": {
>                 "lfc-interval": 1800,
>                 "name": "/var/lib/kea/kea-leases6.csv",
>                 "type": "memfile"
>             },
>             "subnet6": [
>                 {
>                     "interface": "enp1s0.2",
>                     "reservation-mode": "out-of-pool",
>                     "pools": [
>                         {
>                             "pool": "2001:123:456:e8b0:beef:f00f::/112"
>                         }
>                     ],
>                     "reservations-global": false,
>                     "reservations-in-subnet": true,
>                     "eservations-out-of-pool": true,
>

Probably not the solution, but the line above seems to be missing the first
letter.  Is it that way on the server?


>                     "subnet": "2001:123:456:e8b0::/64",
>                     "reservations": [
>                         {
>                             "duid": "00:03:00:01:b8:27:eb:bf:db:dd",
>                             "hostname": "myhost",
>                             "ip-addresses": [
>                                 "2001:123:456:e8b0::f"
>                             ]
>                         }
>                     ]
>                 }
>             ],
>             "valid-lifetime": 1800
>         }
>     }
>
> Logs:
>
>     INFO [kea-dhcp6.dhcp6/182198.139733472774592] DHCP6_STARTED Kea DHCPv6
> server version 2.4.1 started
>     INFO  [kea-dhcp6.leases/182198.139733433005760] DHCP6_LEASE_ADVERT
> duid=[00:03:00:01:b8:27:eb:bf:db:dd], tid=0x3e9640: lease for address
> 2001:123:456:e8b0::f and iaid=1746070577 will be advertised
>     WARN  [kea-dhcp6.alloc-engine/182198.139733433005760]
> ALLOC_ENGINE_V6_ALLOC_FAIL_SUBNET duid=[00:03:00:01:b8:27:eb:bf:db:dd],
> tid=0x3e9640: failed to allocate an IPv6 lease in the subnet
> 2001:123:456:e8b0::/64, subnet-id 1, shared network (none)
>     WARN  [kea-dhcp6.alloc-engine/182198.139733433005760]
> ALLOC_ENGINE_V6_ALLOC_FAIL_NO_POOLS duid=[00:03:00:01:b8:27:eb:bf:db:dd],
> tid=0x3e9640: no pools were available for the lease allocation
>     WARN  [kea-dhcp6.alloc-engine/182198.139733433005760]
> ALLOC_ENGINE_V6_ALLOC_FAIL_CLASSES duid=[00:03:00:01:b8:27:eb:bf:db:dd],
> tid=0x3e9640: Failed to allocate an IPv6 address for client with classes:
> ALL, KNOWN
>     INFO  [kea-dhcp6.leases/182198.139733424613056] DHCP6_LEASE_ALLOC
> duid=[00:03:00:01:b8:27:eb:bf:db:dd], tid=0x137d91: lease for address
> 2001:123:456:e8b0::f and iaid=1746070577 has been allocated for 1800 seconds
> --
>
> --
Bob Harold
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