[Dnsmasq-discuss] DHCPv6 and MAC

[Dan Williams]

On Mon, 2013-02-11 at 16:42 -0500, Gene Czarcinski wrote:
> On 02/11/2013 04:06 PM, Dan Williams wrote:
> 
> > Fedora 17 and 18, until 0.9.7.997, left the DUID behavior up to
> > dhcleint, which appears to generate a default DUID itself; but the
> > NetworkManager code will honor that existing DUID if it finds it in the
> > interface+connection specific lease file [1].  If NM does *not*, please
> > let me know and we'll fix that bug.
> It is *not*.
> 
> I assume that NM is suppose to be examining the lease file before
> dhclient starts because it sure looks like it is dhclient that is
> creating the default.
> 
> I have a real-hardware system that I can reboot or whatever so if you
> need me to test something, just tell me.  I know that it is
> frustrating on both sides if I say there is a problem and you cannot
> reproduce it.
> 
> If you need to see the configuration file, then I should probably open
> a bugzilla report and file it there.
> 
> BTW, I tried putting the default-duid in /etc/dhclient.leases and also
> in /var/lib/dhclient.leases and the only thing that seems to work
> is /var/lib/NetworkManager/dhclient6-<whatever>.lease

You want one of dhclient*6*.leases, in this priority order:

SYSCONFDIR "/dhclient6.leases",
LOCALSTATEDIR "/lib/dhcp/dhclient6.leases",
LOCALSTATEDIR "/lib/dhclient/dhclient6.leases",

or the interface+connection-specific leasefile, eg:

/var/lib/dhclient/dhclient6-cc98bcbe-ef64-4db7-9b46-b12ca02172e6-wlan12.lease

Dan