[systemd-devel] Networkd dhcp hostname override

Thomas Suckow thomas.suckow at pnnl.gov
Thu Aug 14 15:18:44 PDT 2014

> 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.



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