[Kea-users] DHCP6 host reservation

[Cristina Bulfon]

Ciao,

I was unable to use option 79 on relay agent so  I’ve just made a test with both the client and server on the same VLAN ( no relay agent )  and “hw-address”  seems to  work, I will made more test just to be sure.

Regarding the DUID,  maybe I wrong ,in the DHCPv6 lease  file ( server side )  I’ve seen different DUID if I use NetworkManager - service restart - o  dhclient  to get the IPv6 … 
I will evalute pros and cons of whether to  use DUID o hw-address for host reservations 

Thanks everyone for the advice

Regards,
Cristina 

PS: if anyone has the recipe to use hw-address also with a relay agent please let me know :-)  

> On 2 Apr 2024, at 16:06, Francis Dupont <fdupont at isc.org> wrote:
> 
>> Of course in that case you could probably also configure the DHCPv6
>> client to send the hw-address as well :-)
> 
> => in fact you can't: there is no direct way to carry the hardware address
> in DHCPv6. BTW the opposite exists: RFC 4361 specifies a way to use
> a DUID in DHCPv4. Of course you can find it in DHCPv6 messages, the problem
> is usually there are many ways which are not guaranted to return a value
> or the same value.
> See 'MAC/Hardware Addresses in DHCPv6' section in the ARM...
> 
> Regards
> 
> Francis Dupont <fdupont at isc.org>
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