Linux Ethernet Bridging - Aug 2011 - [Bridge] IPv6 multicast snooping behaviour on 2.6.39-rc2 and later

Hi all,

    I have a testbed setup on my VM environment that needs to use MLDv2 report
message. My PIM router which is connected to a port on the bridge relies upon
MLDv2 message to work. However, the setup failed to work after 2.6.39-rc2 or
later. MLDv2 won't be forwarded to any slave ports bound to the bridge
interface. Specifically, I track the cause down to this commit id:
  ff9a57a62afbbe2d0f3a09af321f1fd7645f38a5
    However, as soon as I disable multicast snooping on sysfs, MLDv2 message can
be forwarded again.

    I am not knowledgeable on the subject of multicast snooping, but is this
right behaviour for multicast snooping? IPv4 doesn't seem to suffer the same
fate though, IGMP can be forwarded even if multicast_snooping is enabled. Thank
you in advance.


Regards,
Ang Way Chuang


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