[Dnsmasq-discuss] verification of how RA works.

[Gene Czarcinski]

On 11/26/2012 11:49 AM, Simon Kelley wrote:
> On 26/11/12 16:08, Gene Czarcinski wrote:
>> I believe that RA will work in the manner described below but have not
>> verified/tested this yet.
>>
>> If there are 4 IPv6 (gateway) addresses specified on an interface and
>> one of those addresses has a dhcp-range specified, then having a
>> dhcp-range=<ipv6-addr, ra-only specified for the other three address
>> will result in:
>>
>> 1. state-full RA for the IPv6 subnet with the dhcp-range specified.
>>
>> 2. state-less RA for the other three subnetworks.
>>
>> Yes, it is not clear to me why one would define multiple subnets on the
>> same "fabric" but that is a capability in libvirt for virtual network
>> interfaces.
>>
> Please test it. I'm feeling cautious today, so I'll go as far as to say
> that what you describe is how it should work, it's how I'd expect it to
> work, and if it doesn't work like that it's a bug. It's quite likely
> that no-one has ever done the test before, so please try it.
>
In order to test this I am going to need to do a little coding but I was 
planning to do this anyway.

Interesting.  As far as I can tell, if dnsmasq works as described above, 
it does something that radvd cannot do (at least as a single instance 
with a single configuration file).  In radvd, the Managed Flag is 
specified for the interface, not the subnetwork.

Gene