[Kea-users] updates to existing leases

[Andrey Kostin]

Hi Francis,

Will this trick work for v6? Because IIRC reservations for IPv6 work 
only with hw-address and circuit-id isn't supported.

Kind regards,
Andrey

Francis Dupont писал(а) 2022-07-13 09:57:
> S a i f e r via Kea-users writes:
>> Hello! We have strict host reservation by circuit-id: "hostname:port" 
>> =3D> =
>> "ip" and protection from manual ip by switch capabilities (dhcp 
>> snooping + =
>> ip source guard). Users get ip - all is well. But when replacing a 
>> device (=
>> change mac-address), we have to wait for the end of the lease time, 
>> which i=
>> s very inconvenient. Having studied the issue, I came to the 
>> conclusion tha=
>> t in our configuration we don=E2=80=99t need the lease-database - is 
>> it pos=
>> sible to disable it completely? Or as an option, match the lease not 
>> by cli=
>> ent-id/chaddr, but by circuit-id. These settings would bring us a lot 
>> of co=
>> nvenience and productivity. Are there any solutions I haven't come up 
>> with =
>> on my own? Thank you.
> 
> => the replace-client-id parameter of the flex-id hook does what you 
> want:
> when it is set to true (which is not the default) the client identifier
> in the query message is replaced by the flex-id value so the lease and
> the host reservation are identified by the same value. The initial 
> client
> identifier is put in the response so this is not visible by the client.
> 
> Regards
> 
> Francis Dupont <fdupont at isc.org>