And Francis, you confirm that this is a behaviour which is different between KEA (withoit flex-id) and ISC DHCP ? ________________________________ From: Veronique Lefebure <[email protected]> Sent: Tuesday, January 17, 2023 5:14 PM To: Francis Dupont <[email protected]> Cc: Darren Ankney <[email protected]>; [email protected] <[email protected]> Subject: Re: [Kea-users] IPV6 client gets the wrong IP for sometime after a reboot
Thanks Francis, So according to https://kea.readthedocs.io/en/latest/arm/hooks.html?highlight=flex-id#available-hook-librarieswe need to subscribe to ISC support to make use of it. ________________________________ From: Francis Dupont <[email protected]> Sent: Tuesday, January 17, 2023 4:53 PM To: Veronique Lefebure <[email protected]> Cc: Darren Ankney <[email protected]>; [email protected] <[email protected]> Subject: Re: [Kea-users] IPV6 client gets the wrong IP for sometime after a reboot The problem here is the client is changing its DUID so Kea believes the lease was assigned to a different client using the same mac address. To override this behavior the simplest is to use the mac address as the client identifier with flex-id and replace-client-id set to yes. Another way is to replace on the wire the DUID by a fixed value... Thanks Francis Dupont <[email protected]> PS: DHCPv4 clients have two identifiers: the client-id option and the mac address. If the client-id option has the precedence this can be disabled at the subnet level or higher. There is a RFC too explaining how to deal with this issue when using both DHCPv4 and DHCPv6...
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