[Kea-users] issue with INIT-REBOOT

[Hieu Nguyen]

 2 client (Windows and iOS) in "INIT-REBOOT" state sends a DHCP Request to
KEA through a relay.
Requested address (option 50) is its old address. This subnet isn't
configured in KEA server.

Kea don't know of this client.

*+ Observed behavior:*
 iOS:
2018-07-01 15:26:34.892 DEBUG [kea-dhcp4.bad-packets/1553]
DHCP4_PACKET_NAK_0002 [hwtype=1 6c:4d:73:f3:d4:19],
cid=[01:6c:4d:73:f3:d4:19], tid=0xb858b700: invalid address 10.122.23.24
requested by INIT-REBOOT

Windows:
2018-07-01 15:28:00.290 DEBUG [kea-dhcp4.bad-packets/1553]
DHCP4_NO_LEASE_INIT_REBOOT [hwtype=1 f0:42:1c:e5:f3:5d],
cid=[01:f0:42:1c:e5:f3:5d], tid=0x954bf4ee: no lease for address
10.122.13.204 requested by INIT-REBOOT client

Window  client must use the command " ipconfig /release and ipconfig /renew
" to obtain new ip address.

*+ Expected behavior:*
Kea returns a NAK to Windows like iOS.

After that I set up other DHCP Server from Microsoft. It properly returns
DHCP NAK to 2 clients.

I also attached the capture from kea server. help me this case,plz
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