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RFC4361 intends to set the same IAID/DUID for both DHCPv4 and DHCPv6. Previously, we didn't have a mode for that. Of course, you could always set "ipv4.dhcp-client-id" and "ipv6.dhcp-duid" to (the same) hex string, but there was no automatic mode. Instead we had: - "ipv4.dhcp-client-id=duid" which sets the client ID to a stable, generated DUID. However, there was no option so that the same DUID/IAID would be automatically used for DHCPv6. - there are various special values for "ipv6.dhcp-duid" which generate a stable DUIDs. However, those values did not work for "ipv4.dhcp-client-id". Solve that by adding "ipv4.dhcp-client-id=ipv6-duid" which indicates to use the DUID from DHCPv6's "ipv6.dhcp-duid" setting. As IAID it will prefer "ipv4.dhcp-iaid" (if set), but fallback to "ipv6.dhcp-iaid". https://tools.ietf.org/html/rfc4361 https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/issues/618 https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/718 |
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