[Kea-users] KEA sends valid-lifetime = 0

[Veronique Lefebure]

Hi,

For the following query:

16:24:15.730401 IP6 (hlim 1, next-header UDP (17) payload length: 143)
cs-lab11-kea.dhcpv6-client > ff02::1:2.dhcpv6-server:
[bad udp cksum 0xc2bb -> 0xa8e1!]
dhcp6 renew (xid=50bedb
(client-ID type 4)
(server-ID hwaddr/time type 1 time 692127779 00259074ca68)
(option-request DNS-server DNS-search-list DNS-server DNS-search-list client-ID)
(elapsed-time 0) (Client-FQDN)
(IA_NA IAID:795336567 T1:3600 T2:5400(IA_ADDR xxxx::101:1 pltime:7200 vltime:7500))
)

I have observed a case where KEA dhcp6 returns the following:

16:24:16.359170 IP6 (hlim 64, next-header UDP (17) payload length: 171)
gateway.dhcpv6-server > cs-lab11-kea.dhcpv6-client:
[udp sum ok]
dhcp6 reply (xid=50bedb
(client-ID type 4)
(server-ID hwaddr/time type 1 time 692127779 00259074ca68)
(IA_NA IAID:795336567 T1:40 T2:100
(IA_ADDR xxxx::101:1 pltime:120 vltime:120)
(IA_ADDR xxxx::101:1 pltime:0 vltime:0))
(DNS-search-list cern.ch.) (Client-FQDN))

Where there are 2 IA_ADDR, the second one having a vltime of 0.

Any idea how that can happen ?

wireshark shows this:

[...]
Message type: Reply (7)
Transaction ID: 0x52a6e8
Client Identifier
Server Identifier
Identity Association for Non-temporary Address
Option: Identity Association for Non-temporary Address (3)
Length: 68
xxx
IAID: 2f67df77
T1: 40
T2: 100
IA Address
Option: IA Address (5)
Length: 24
Value: xxxx10100010000007800000078
IPv6 address: 2001:1458:202:1d5::101:1 (xxxx::101:1)
Preferred lifetime: 120
Valid lifetime: 120
IA Address
Option: IA Address (5)
Length: 24
Value: xxxx10100010000000000000000
IPv6 address: 2001:1458:202:1d5::101:1 (xxxx::101:1)
Preferred lifetime: 0
Valid lifetime: 0
Domain Search List
Fully Qualified Domain Name

Thanks,
Veronique
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