Re: [PATCH] IGMP: Inhibit reports for local multicast groups

On Thu, Aug 13, 2015 at 02:48:23PM +0000, Philip Downey wrote:

Hi David
Thanks for taking the time to review and comment.
This is my first upstream request so please forgive any ignorance on my part.   I have added a new proposed commit wording below with a view to agreeing the content before resubmitting the patch.
I hope it is sufficient to address your concerns.

   IGMP: Inhibit reports for local multicast groups
    
    The range of addresses between 224.0.0.0 and 224.0.0.255
    inclusive, is reserved for the use of routing protocols and other
    low-level topology discovery or maintenance protocols, such as
    gateway discovery and group membership reporting.  Multicast
    routers should not forward any multicast datagram with   destination
    addresses in this range, regardless of its TTL.

    Currently, IGMP reports are generated for this reserved range of
    addresses even though a router will ignore this information since
    it has no purpose.

Hi Philip

What about switches which are doing IGMP snooping?

     Andrew