2019-12-05 14:51:51.164 DEBUG [kea-dhcp4.packets/4041] DHCP4_BUFFER_RECEIVED received buffer from 0.0.0.0:68 to 192.168.56.102:67 over interface enp0s8
2019-12-05 14:51:51.164 DEBUG [kea-dhcp4.options/4041] DHCP4_BUFFER_UNPACK parsing buffer received from 0.0.0.0 to 192.168.56.102 over interface enp0s8
2019-12-05 14:51:51.166 DEBUG [kea-dhcp4.packets/4041] DHCP4_PACKET_RECEIVED [hwtype=1 08:00:27:46:a4:b7], cid=[no info], tid=0x33dcc655: DHCPDISCOVER (type 1) received from 0.0.0.0 to 192.168.56.102 on interface enp0s8
2019-12-05 14:51:51.166 DEBUG [kea-dhcp4.packets/4041] DHCP4_QUERY_DATA [hwtype=1 08:00:27:46:a4:b7], cid=[no info], tid=0x33dcc655, packet details: local_address=192.168.56.102:67, remote_address=0.0.0.0:68, msg_type=DHCPDISCOVER (1), transid=0x33dcc655,
options:
  type=012, len=020: "vokhacduy-VirtualBox" (string)
  type=050, len=004: 192.168.56.102 (ipv4-address)
  type=053, len=001: 1 (uint8)
  type=055, len=013: 1(uint8) 28(uint8) 2(uint8) 3(uint8) 15(uint8) 6(uint8) 119(uint8) 12(uint8) 44(uint8) 47(uint8) 26(uint8) 121(uint8) 42(uint8)
2019-12-05 14:51:51.166 DEBUG [kea-dhcp4.packets/4041] DHCP4_SUBNET_SELECTION_FAILED [hwtype=1 08:00:27:46:a4:b7], cid=[no info], tid=0x33dcc655: failed to select subnet for the client
2019-12-05 14:51:51.166 DEBUG [kea-dhcp4.dhcp4/4041] DHCP4_CLASS_ASSIGNED [hwtype=1 08:00:27:46:a4:b7], cid=[no info], tid=0x33dcc655: client packet has been assigned to the following class(es): UNKNOWN
2019-12-05 14:51:51.166 DEBUG [kea-dhcp4.dhcp4/4041] DHCP4_CLASS_ASSIGNED [hwtype=1 08:00:27:46:a4:b7], cid=[no info], tid=0x33dcc655: client packet has been assigned to the following class(es): ALL, UNKNOWN
2019-12-05 14:51:51.166 DEBUG [kea-dhcp4.ddns/4041] DHCP4_CLIENT_HOSTNAME_PROCESS [hwtype=1 08:00:27:46:a4:b7], cid=[no info], tid=0x33dcc655: processing client's Hostname option
2019-12-05 14:51:51.166 DEBUG [kea-dhcp4.ddns/4041] DHCP4_CLIENT_HOSTNAME_DATA [hwtype=1 08:00:27:46:a4:b7], cid=[no info], tid=0x33dcc655: client sent Hostname option: vokhacduy-VirtualBox
2019-12-05 14:51:51.167 DEBUG [kea-dhcp4.ddns/4041] DHCP4_CLIENT_HOSTNAME_DATA [hwtype=1 08:00:27:46:a4:b7], cid=[no info], tid=0x33dcc655: client sent Hostname option: vokhacduy-VirtualBox
2019-12-05 14:51:51.167 DEBUG [kea-dhcp4.ddns/4041] DHCP4_RESPONSE_HOSTNAME_DATA [hwtype=1 08:00:27:46:a4:b7], cid=[no info], tid=0x33dcc655: including Hostname option in the server's response: vokhacduy-virtualbox
2019-12-05 14:51:51.167 ERROR [kea-dhcp4.bad-packets/4041] DHCP4_PACKET_NAK_0001 [hwtype=1 08:00:27:46:a4:b7], cid=[no info], tid=0x33dcc655: failed to select a subnet for incoming packet, src 0.0.0.0, type DHCPDISCOVER
2019-12-05 14:51:53.170 DEBUG [kea-dhcp4.dhcpsrv/4041] DHCPSRV_TIMERMGR_RUN_TIMER_OPERATION running operation for timer: flush-reclaimed-leases
2019-12-05 14:51:53.170 DEBUG [kea-dhcp4.alloc-engine/4041] ALLOC_ENGINE_V4_RECLAIMED_LEASES_DELETE begin deletion of reclaimed leases expired more than 3600 seconds ago
2019-12-05 14:51:53.170 DEBUG [kea-dhcp4.dhcpsrv/4041] DHCPSRV_MYSQL_DELETE_EXPIRED_RECLAIMED4 deleting reclaimed IPv4 leases that expired more than 3600 seconds ago
2019-12-05 14:51:53.172 DEBUG [kea-dhcp4.dhcpsrv/4041] DHCPSRV_MYSQL_DELETED_EXPIRED_RECLAIMED deleted 0 reclaimed leases from the database
2019-12-05 14:51:53.172 DEBUG [kea-dhcp4.alloc-engine/4041] ALLOC_ENGINE_V4_RECLAIMED_LEASES_DELETE_COMPLETE successfully deleted 0 expired-reclaimed leases
2019-12-05 14:51:53.172 DEBUG [kea-dhcp4.dhcpsrv/4041] DHCPSRV_TIMERMGR_START_TIMER starting timer: flush-reclaimed-leases