On 03/31/2013 07:56 PM, 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.
I seem to recall that there are routers that behave otherwise: they don't send the packets on any ports. Cheers, -- Fernando Gont e-mail: [email protected] || [email protected] PGP Fingerprint: 7809 84F5 322E 45C7 F1C9 3945 96EE A9EF D076 FFF1
