[Dnsmasq-discuss] DHCPv6 with dnsmasq for automated deployments

P W stappers at stappers.nl
Fri May 25 16:23:20 BST 2018


On Fri, May 25, 2018 at 03:34:08PM +0200, Oliver Freyermuth wrote:
> Am 25.05.2018 um 15:30 schrieb Kevin Darbyshire-Bryant:
> >> On 25 May 2018, at 13:07, Oliver Freyermuth wrote:
> >>
> >> Dear dnsmasqers,
> >>
> >> I fear the following is a design issue of DHCPv6, but I wonder if there's a way to overcome it with dnsmasq...
> > <snip>
> > 
> > Hi Oliver,
> > 
> > I???ve a similar/same problem when rebooting some QNAP NAS boxen,
> > first boot/introduction to dnsmasq and they get both IPv4 & v6
> > addresses set to fixed values based on MAC address.  On reboot whilst
> > IPv4 is fine, IPv6 is not reallocated to the original address but
> > rather a new one.  By curious co-incidence I just started looking
> > into this problem today though it has been bugging me for months :-)
> > Have tried various combinations of MAC address & DUID.
> > 
> 
> Dear Kevin, 
> 
> I think it's exactly the same issue. 
> Comparing:
> > Fri May 25 12:47:13 2018 daemon.info dnsmasq-dhcp[26168]: 5514926 DHCPREQUEST(br-lan) 00:01:00:01:22:9a:b4:43:24:5e:be:0c:bc:ba
> with
> > Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 12603117 DHCPSOLICIT(br-lan) 00:01:00:01:22:9a:b7:2b:24:5e:be:0c:bc:ba
> it seems the QNAP NAS box is using a fresh client DUID each reboot... 


Patches Welcome



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