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...)
