[Kea-users] Hints

Tue May 23 21:09:02 UTC 2023

Thanks for the response. I am using a Mikrotik router and I can get
the desired PD from Charter Spectrum just fine but when I try to do the
same with Kea it always assigns me the delegated-len value of /56
regardless of what hint I include.

In this example my Mikrotik is set with prefix hin ::/64
In Kea the DEBUG DHCP6 PACKET RECEIVED it shows the prefix=::/64
DEBUG DHCP6_PROCESS_IA_PD_REQUEST duid=[00:03:00:01:0e:21:15:70:0c:f0],
tid=0x26e767: server is processing IA_PD option with iaid=1 and hint=::
DHCP6_PD_LEASE_ADVERT duid=[00:03:00:01:0e:21:15:70:0c:f0], tid=0xa0e83f:
lease for prefix fd00:c40:20:600::/56 and iaid=1 will be advertised

Full Log:
20:47:11 DEBUG DHCP6_PACKET_RECEIVED duid=[00:03:00:01:0e:21:15:70:0c:f0],
tid=0xa0e83f: SOLICIT (type 1) received from fe80::c21:15ff:fe70:cf0 to
ff02::1:2 on interface eth1
<len=00012: iaid=1, t1=1800, t2=2880#012type=00008, len=00002: 0
(uint16)#012type=00025(IA_PD), len=00041: iaid=1, t1=1800,
t2=2880,#012options:#012  type=00026(IAPREFIX), len=00025: prefix=::/64,
preferred-lft=2880, valid-lft=3600#012No relays traversed.#012
20:47:11 DEBUG HOOKS_CALLOUTS_BEGIN begin all callouts for hook pkt6_receive
20:47:11 DEBUG HOOKS_CALLOUT_CALLED hooks library with index 1 has called a
callout on hook pkt6_receive that has address 0x7fb78df0b710 (callout
duration: 0.036 ms)
20:47:11 DEBUG HOOKS_CALLOUTS_COMPLETE completed callouts for hook
pkt6_receive (total callouts duration: 0.036 ms)
20:47:11 DEBUG DHCPSRV_CFGMGR_SUBNET6_IFACE selected subnet
fd00:c40:10::/64 for packet received over interface eth1
20:47:11 DEBUG DHCP6_SUBNET_SELECTED duid=[00:03:00:01:0e:21:15:70:0c:f0],
tid=0xa0e83f: the subnet with ID 1 was selected for client assignments
20:47:11 DEBUG DHCP6_SUBNET_DATA duid=[00:03:00:01:0e:21:15:70:0c:f0],
tid=0xa0e83f: the selected subnet details: fd00:c40:10::/64
20:47:11 DEBUG HOSTS_CFG_GET_ONE_SUBNET_ID_IDENTIFIER get one host with
IPv6 reservation for subnet id 1, identified by duid=000300010E2115700CF0
20:47:11 DEBUG HOSTS_CFG_GET_ALL_IDENTIFIER get all hosts with reservations
using identifier: duid=000300010E2115700CF0
20:47:11 DEBUG HOSTS_CFG_GET_ALL_IDENTIFIER_COUNT using identifier
duid=000300010E2115700CF0, found 0 host(s)
20:47:11 DEBUG HOSTS_CFG_GET_ONE_SUBNET_ID_IDENTIFIER_NULL host not found
using subnet id 1 and identifier duid=000300010E2115700CF0
20:47:11 DEBUG HOSTS_CFG_GET_ONE_SUBNET_ID_IDENTIFIER get one host with
IPv6 reservation for subnet id 1, identified by hwaddr=0E2115700CF0
20:47:11 DEBUG HOSTS_CFG_GET_ALL_IDENTIFIER get all hosts with reservations
using identifier: hwaddr=0E2115700CF0
20:47:11 DEBUG HOSTS_CFG_GET_ALL_IDENTIFIER_COUNT using identifier
hwaddr=0E2115700CF0, found 0 host(s)
20:47:11 DEBUG HOSTS_CFG_GET_ONE_SUBNET_ID_IDENTIFIER_NULL host not found
using subnet id 1 and identifier hwaddr=0E2115700CF0
20:47:11 DEBUG DHCP6_CLASS_ASSIGNED duid=[00:03:00:01:0e:21:15:70:0c:f0],
tid=0xa0e83f: client packet has been assigned to the following class(es):
UNKNOWN
20:47:11 DEBUG DHCP6_PROCESS_IA_NA_REQUEST
duid=[00:03:00:01:0e:21:15:70:0c:f0], tid=0xa0e83f: server is processing
IA_NA option with iaid=1 and hint=(no hint)
20:47:11 DEBUG DHCPSRV_MEMFILE_GET_IAID_DUID obtaining IPv6 leases for IAID
1 and DUID 00:03:00:01:0e:21:15:70:0c:f0 and lease type IA_NA
20:47:11 DEBUG ALLOC_ENGINE_V6_ALLOC_UNRESERVED no static reservations
available - trying to dynamically allocate leases for client
duid=[00:03:00:01:0e:21:15:70:0c:f0], tid=0xa0e83f
20:47:11 DEBUG HOSTS_CFG_GET_ONE_SUBNET_ID_ADDRESS6 get one host with
reservation for subnet id 1 and having IPv6 address fd00:c40:10::206
20:47:11 DEBUG HOSTS_CFG_GET_ALL_SUBNET_ID_ADDRESS6 get all hosts with
reservations for subnet id 1 and IPv6 address fd00:c40:10::206
20:47:11 DEBUG HOSTS_CFG_GET_ALL_SUBNET_ID_ADDRESS6_COUNT using subnet id 1
and address fd00:c40:10::206, found 0 host(s)
20:47:11 DEBUG HOSTS_CFG_GET_ONE_SUBNET_ID_ADDRESS6_NULL host not found
using subnet id 1 and address fd00:c40:10::206
20:47:11 DEBUG DHCPSRV_MEMFILE_GET_ADDR6 obtaining IPv6 lease for address
fd00:c40:10::206 and lease type IA_NA
20:47:11 INFO  DHCP6_LEASE_ADVERT duid=[00:03:00:01:0e:21:15:70:0c:f0],
tid=0xa0e83f: lease for address fd00:c40:10::206 and iaid=1 will be
advertised
20:47:11 DEBUG DHCP6_LEASE_DATA duid=[00:03:00:01:0e:21:15:70:0c:f0],
tid=0xa0e83f: detailed lease information for iaid=1: Type:
 IA_NA(0)#012Address:       fd00:c40:10::206#012Prefix length: 128#012IAID:
         1#012Pref life:     453600#012Valid life:    604800#012Cltt:
>
20:47:11 DEBUG DHCP6_PROCESS_IA_PD_REQUEST
duid=[00:03:00:01:0e:21:15:70:0c:f0], tid=0xa0e83f: server is processing
IA_PD option with iaid=1 and hint=::
20:47:11 DEBUG DHCPSRV_MEMFILE_GET_IAID_DUID obtaining IPv6 leases for IAID
1 and DUID 00:03:00:01:0e:21:15:70:0c:f0 and lease type IA_PD
20:47:11 DEBUG ALLOC_ENGINE_V6_ALLOC_UNRESERVED no static reservations
available - trying to dynamically allocate leases for client
duid=[00:03:00:01:0e:21:15:70:0c:f0], tid=0xa0e83f
20:47:11 DEBUG HOSTS_CFG_GET_ONE_SUBNET_ID_ADDRESS6 get one host with
reservation for subnet id 1 and having IPv6 address fd00:c40:20:600::
20:47:11 DEBUG HOSTS_CFG_GET_ALL_SUBNET_ID_ADDRESS6 get all hosts with
reservations for subnet id 1 and IPv6 address fd00:c40:20:600::
20:47:11 DEBUG HOSTS_CFG_GET_ALL_SUBNET_ID_ADDRESS6_COUNT using subnet id 1
and address fd00:c40:20:600::, found 0 host(s)
20:47:11 DEBUG HOSTS_CFG_GET_ONE_SUBNET_ID_ADDRESS6_NULL host not found
using subnet id 1 and address fd00:c40:20:600::
20:47:11 DEBUG DHCPSRV_MEMFILE_GET_ADDR6 obtaining IPv6 lease for address
fd00:c40:20:600:: and lease type IA_PD
20:47:11 INFO  DHCP6_PD_LEASE_ADVERT duid=[00:03:00:01:0e:21:15:70:0c:f0],
tid=0xa0e83f: lease for prefix fd00:c40:20:600::/56 and iaid=1 will be
advertised

Any Thoughts?

On Tue, May 23, 2023 at 2:46 AM Darren Ankney <darren.ankney at gmail.com>
wrote:

> Hello Joshua,
>
> It would appear it just happens. No need to configure anything.  There
> is a debug message about the hint being processed:
>
> https://kea.readthedocs.io/en/kea-2.2.0/kea-messages.html
>
> DHCP6_PROCESS_IA_PD_REQUEST
>
> %1: server is processing IA_PD option with iaid=%2 and hint=%3
>
> This is a debug message that indicates a processing of received IA_PD
> option. The first argument contains the client and the transaction
> identification information. The second argument holds the IAID of the
> IA_PD option. The third argument may hold the hint for the server
> about the prefix that the client would like to have allocated. If
> there is no hint, the argument should provide the text indicating that
> the hint hasn't been sent.
>
> Thank you,
>
> Darren Ankney
>
> On Mon, May 22, 2023 at 8:39 PM Joshua Pool via Kea-users
> <kea-users at lists.isc.org> wrote:
> >
> > With KEA 2.2 is there a way to assign a PD based on received PD hints?
> >
> >
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