[systemd-devel] Networkd dhcp hostname override

[Thomas Suckow]

> It's used as a general identifier of the client in any situation, so
> that the server can pass back specific options.  Yes, this can be done
> by looking at the client MAC address, but that's not sufficient in the
> following cases:
>
> 1) non-Ethernet hardware addresses
> 2) dual-stack clients using DHCPv4 and DHCPv6
> 3) you change the NIC and want the same options
> 4) the NIC doesn't have a permanent MAC address
>
> The client ID (and on the DHCPv6 side, the DUID) is the
> single-identifier solution that should really be used instead of the MAC
> address.
>

Touché

-
Thomas