[Dnsmasq-discuss] Can't figure out how to assign static IPv6 addresses to clients

[e9hack]

Am 02.10.2012 23:09, schrieb Simon Kelley:
> On 02/10/12 21:53, e9hack wrote:
>> Am 02.10.2012 21:52, schrieb Simon Kelley:
>>> On 02/10/12 14:56, Dan Williams wrote:
>>>> So you really want to reconfigure either dnsmasq or radvd to set the
>>>> "M" (Managed) flag, which will tell the clients to get their address
>>>> from DHCPv6, not generate one from the RA prefix option.
>>>
>>> Dan is right, and the way to do this in dnsmasq is to define a dhcp-range, and set the
>>> global enable-ra flag. That will send RA (for the default route) with the M flag set (no
>>> SLAAC address). If you want SLAAC addresses _as_well_ as DHCPv6 assigned ones, add the
>>> "slaac" keyword to the dhcp-range. That clears the M flag.
>>
>> That's wrong. The M flag is for DHCPv6 only. It says nothing about SLAAC. SLAAC is
>> available, if a prefix is advertise.
>>
> 
> I'm going from memory of experiments months ago, but I'm sure that the Linux kernel IPv6
> autoconfiguration code, at least, does not assign SLAAC addresses if it gets RAs with the
> M bit set.

I'm using radvd and dnsmasq. Dnsmasq is used for DHCPv6 but not for RA. If I disable the M
flag at the radvd side, linux and windows 7 clients doesn't ask for a DHCPv6 lease, but
they are using a SLAAC address. If I enable the M flag, both clients are using the SLAAC
address and asking for a DHCPv6 lease.

I'm using DHCPv6 (and a ULA prefix with RA) to configure site-local address. RA is used
for global addresses to access the internet over a 6to4 auto tunnel with a prefix of
2002:aaaa:bbbb::/64.

Regards,
Hartmut