Too-frequent change of privacy address / ND monitoring

[Phil Mayers]

On 31/03/2013 23:56, Daniel Roesen wrote:
> On Sun, Mar 31, 2013 at 02:57:20AM -0300, Fernando Gont wrote:
>>> Totally random crazy idea: could there be firewalls on some of these
>>> machines that are causing multicast RAs to be filtered but unicast RAs
>>> are fine (e.g. a unicast RA reply to an RS)?
>>
>> Not sure if "firewalls", but I could think of swtiches that fail to do
>> MLD snoping and hence do not forward multicasted packets?
>
> Switches not performing MLD will just flood multicast packets just like
> broadcast. I'm not sure that this is codified anywhere, but I certainly
> didn't see anything else yet.

Assuming they're operating correctly of course. FWIW that's what our 
devices do (i.e. flood - no MLD snooping until recent firmware 
revisions, and warnings in the docs about table overflow on large layer2 
if you do enable it...)