[Dnsmasq-discuss] DHCPv6 with dnsmasq for automated deployments

[Kevin Darbyshire-Bryant]

> On 25 May 2018, at 13:07, Oliver Freyermuth <o.freyermuth at googlemail.com> 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.

Without meaning to thread hijack!  If it’s not effectively the same issue will gladly start a new thread.


First boot with fresh dnsmasq
Fri May 25 12:47:13 2018 daemon.info dnsmasq-dhcp[26168]: 5514926 client MAC address: 24:5e:be:0c:bc:ba
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
Fri May 25 12:47:13 2018 daemon.info dnsmasq-dhcp[26168]: 5514926 DHCPREPLY(br-lan) 2a02:c7f:beef:2000::e 00:01:00:01:22:9a:b4:43:24:5e:be:0c:bc:ba Statler
Fri May 25 12:47:13 2018 daemon.info dnsmasq-dhcp[26168]: 5514926 tags: lan, known, dhcpv6, br-lan
Fri May 25 12:47:13 2018 daemon.info dnsmasq-dhcp[26168]: 5514926 sent size: 14 option:  2 server-id  00:01:00:01:21:92:2f:dc:60:e3:27:af:9e:51
Fri May 25 12:47:13 2018 daemon.info dnsmasq-dhcp[26168]: 5514926 sent size: 40 option:  3 ia-na  IAID=3132886206 T1=21600 T2=37800
Fri May 25 12:47:13 2018 daemon.info dnsmasq-dhcp[26168]: 5514926 nest size: 24 option:  5 iaaddr  2a02:c7f:beef:2000::e PL=43200 VL=43200
Fri May 25 12:47:13 2018 daemon.info dnsmasq-dhcp[26168]: 5514926 sent size:  9 option: 13 status  0 success
Fri May 25 12:47:13 2018 daemon.info dnsmasq-dhcp[26168]: 5514926 sent size:  1 option:  7 preference  255
Fri May 25 12:47:13 2018 daemon.info dnsmasq-dhcp[26168]: 5514926 sent size: 29 option: 24 domain-search  lan.darbyshire-bryant.me.uk
Fri May 25 12:47:13 2018 daemon.info dnsmasq-dhcp[26168]: 5514926 sent size: 16 option: 23 dns-server  2a02:c7f:beef:2000::da2b:da2b
Fri May 25 12:47:13 2018 daemon.info dnsmasq-dhcp[26168]: 5514926 sent size: 38 option: 39 FQDN  Statler.lan.darbyshire-bryant.me.uk


And now a reboot of the client:
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 12603117 available DHCP range: 2a02:c7f:beef:2000::1000 -- 2a02:c7f:beef:2000::ffff
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 12603117 client MAC address: 24:5e:be:0c:bc:ba
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
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 12603117 DHCPADVERTISE(br-lan) 2a02:c7f:beef:2000::9c72 00:01:00:01:22:9a:b7:2b:24:5e:be:0c:bc:ba Statler
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 12603117 tags: lan, known, dhcpv6, br-lan
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 12603117 sent size: 14 option:  1 client-id  00:01:00:01:22:9a:b7:2b:24:5e:be:0c:bc:ba
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 12603117 sent size: 14 option:  2 server-id  00:01:00:01:21:92:2f:dc:60:e3:27:af:9e:51
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 12603117 sent size: 40 option:  3 ia-na  IAID=3132886206 T1=21600 T2=37800
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 12603117 nest size: 24 option:  5 iaaddr  2a02:c7f:beef:2000::9c72 PL=43200 VL=43200
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 12603117 sent size:  9 option: 13 status  0 success
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 12603117 sent size:  1 option:  7 preference  255
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 12603117 sent size: 29 option: 24 domain-search  lan.darbyshire-bryant.me.uk
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 12603117 sent size: 16 option: 23 dns-server  2a02:c7f:beef:2000::da2b:da2b
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 12603117 sent size:  9 option: 39 FQDN  Statler
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 15821508 available DHCP range: 2a02:c7f:beef:2000::1000 -- 2a02:c7f:beef:2000::ffff
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 15821508 client MAC address: 24:5e:be:0c:bc:ba
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 15821508 DHCPREQUEST(br-lan) 00:01:00:01:22:9a:b7:2b:24:5e:be:0c:bc:ba
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 15821508 DHCPREPLY(br-lan) 2a02:c7f:beef:2000::9c72 00:01:00:01:22:9a:b7:2b:24:5e:be:0c:bc:ba Statler
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 15821508 tags: lan, known, dhcpv6, br-lan
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 15821508 sent size: 14 option:  1 client-id  00:01:00:01:22:9a:b7:2b:24:5e:be:0c:bc:ba
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 15821508 sent size: 14 option:  2 server-id  00:01:00:01:21:92:2f:dc:60:e3:27:af:9e:51
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 15821508 sent size: 40 option:  3 ia-na  IAID=3132886206 T1=21600 T2=37800
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 15821508 nest size: 24 option:  5 iaaddr  2a02:c7f:beef:2000::9c72 PL=43200 VL=43200
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 15821508 sent size:  9 option: 13 status  0 success
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 15821508 sent size:  1 option:  7 preference  255
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 15821508 sent size: 29 option: 24 domain-search  lan.darbyshire-bryant.me.uk
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 15821508 sent size: 16 option: 23 dns-server  2a02:c7f:beef:2000::da2b:da2b
Fri May 25 12:59:40 2018 daemon.info dnsmasq-dhcp[26168]: 15821508 sent size: 38 option: 39 FQDN  Statler.lan.darbyshire-bryant.me.uk



Cheers,

Kevin D-B

012C ACB2 28C6 C53E 9775  9123 B3A2 389B 9DE2 334A

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