Maddes,
  This looks very similar to a question I asked a few days ago...
http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2017q3/011677.html

dnsmasq DHCPv6 server only seems to be issuing leases on the ULA prefix and
not on the GUA prefix when both types of addresses are configured on an
interface.  If I remove the ULA from the network interface then leases are
issued from the GUA range.

I am awaiting a reply to my question.

David

On Fri, Aug 18, 2017 at 9:38 AM, M. Buecher <maddes+dnsm...@maddes.net>
wrote:

> Hello dnsmasq fellows,
> Hello Simon,
>
> I want to assign additional static DHCPv6 global unicast addresses (GUA)
> to some machines (mainly servers).
> Yet I have failed to do so with dnsmasq.
>
> The GUA prefix [1] is advertised by my router "AVM FRITZ!Box 7490" [3].
> Its Router Advertisement (RA) has M-, O- and A-flag set. Priority is
> middle.
> And it is the standard gateway for Internet connections.
>
> dnsmasq 2.76 is running on a Raspberry with Raspbian 8 "Jessie" [4].
> It is the only DNSv4/v6 server in the LAN and serves the local domain.
> All other requests are forwarded by dnsmasq via IPv4 to the DNS relay of
> the router, this way those requests are resolved by the ISP's DNS servers.
> It also advertises the Unique Local Addresses (ULA) [2] for the LAN via RA
> and assigns addresses via DHCPv6 only.
> The host with dnsmasq (Raspberry) has a GUA via SLAAC by the router's RA.
>
> Test machine is Windows 10 with latest updates.
> It got its ULA via DHCPv6 from dnsmasq and has a GUA via SLAAC by the
> router's RA.
> Additionally a second GUA is present due to Windows' IPv6 privacy
> extensions for outgoing connections.
> *But* it doesn't have it's static GUA from dnsmasq!
>
> Am I missing something in my dnsmasq configuration (see below)?
> Or do I have to configure the clients in another way?
> Any other enhancements for my configuration?
>
>
> By the way:
> Does dnsmasq also send a RA for the second/GUA dhcp range? How can I avoid
> this?
> I would prefer to handle RA settings per dhcp-range via tags.
>
>
> Configuration:
> 1. File /etc/default/dnsmasq (Debian specific)
> #DOMAIN_SUFFIX=`dnsdomainname`
> #DNSMASQ_OPTS="--conf-file=/etc/dnsmasq.alt"
> ENABLED=1
> CONFIG_DIR=/etc/dnsmasq.d,.dpkg-dist,.dpkg-old,.dpkg-new
> IGNORE_RESOLVCONF=yes
>
> 2. dnsmasq configuration
> # IPv4 options: router, dns, ntp
> dhcp-option=tag:lan4,3,10.0.0.254
> dhcp-option=tag:lan4,6,0.0.0.0
> dhcp-option=tag:lan4,42,10.0.0.254
>
> # IPv6 options: dns, domain
> dhcp-option=option6:dns-server,[fd00::]
> dhcp-option=tag:ula6,option6:domain-search,local.domain
>
> dhcp-authoritative
> domain-needed
> strict-order
> no-resolv
> localise-queries
> bogus-priv
> expand-hosts
> local-service
> domain=local.domain
> local=/local.domain/
> addn-hosts=/etc/hosts.static
> addn-hosts=/etc/hosts.block
> stop-dns-rebind
> rebind-localhost-ok
> dhcp-broadcast=tag:needs-broadcast
>
> server=10.0.0.254
>
> ### IPv4 range
> dhcp-range=set:lan4,10.0.0.100,10.0.0.199,255.255.255.0,12h
>
> ### IPv6 ranges
> dhcp-range=set:ula6,fd7a:d:e:f::1:0,fd7a:d:e:f::1:ffff,64,12h
> dhcp-range=set:gua6,2003:a:b:c00::1:0,2003:a:b:c00::1:ffff,static,64,12h
> enable-ra
>
> dhcp-host=00:50:56:39:1d:3e,10.0.0.50,[::32],test-machine
>
>
> Kind regards
> Maddes
>
>
> [1] Telekom native IPv6 Internet connection
> IPv6 prefix: 2003:a:b:c00::/56 (c|00 = 256 subnets possible)
> IPv6 adresses: 2003:a:x:y:1:2:3:4 (External IPv6 address from ISP subnet)
>
> [2] Unique Local Addresses
> ULA: fd7a:d:e:f::/64
>
> [3] Router AVM FRITZ!Box 7490
> FRITZ!OS: 06.83 (German)
> DHCPv6 for LAN: Off
> Standard-Gateway for Internet: On
> DNS via RA: Off (RFC 5006)
> RA: Enabled with M and O flag, SLAAC allowed (=A flag); DNS not advertised
> https://en.avm.de/service/fritzbox/fritzbox-7490/overview/
> https://en.avm.de/products/fritzbox/fritzbox-7490/
>
> [4] Raspberry Pi 2
> OS: Raspbian, Derivative of Debian 8 "Jessie", build from Raspberry Pi
> Foundation
> https://www.raspberrypi.org/products/raspberry-pi-2-model-b/
> https://www.raspberrypi.org/downloads/raspbian/
> https://www.raspbian.org/
>
>
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>
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