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RDMnet (BSR E1.33) Draft Standard General Discussion General Discussion and questions concerning the draft E1.33 standard.

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Old December 30th, 2011   #1
SeanSill
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Default sACN and IGMP

I was wondering if there was a better place to ask questions about sACN but more importantly I have a few questions about IGMPv3 implementations. Is there a more appropriate place?
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Old January 1st, 2012   #2
ericthegeek
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Not really a better place. This is as good a place as any.

IGMP is a many-splendored beast.
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Old January 3rd, 2012   #3
SeanSill
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I am finding out about this beast. I am reading through the rfcs since there isn't a good practical example I've found online that depicts IGMPv3. So as a point of clarification I am a IGMP host and there is a router somewhere.

I'm supporting IGMPv3 but not source specific filtering. So all groups will either be include all, or exclude all at least for now. I may change this in the future.

So if I have received a Group-Specific Query and started its timer then received a Group and Source-Specific Query I am to then to change my report to from a Group-Specific Query to a Group and Source-Specific Query and send at the earlier of the two times correct?

If the above is true then does it work in the opposite way? I receive a Group and Source-Specific Query and then receive a Group-Specific Query I respond at the earlier time of the two with a Group-Specific Query?

Thanks for the help guys!
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Old January 3rd, 2012   #4
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I'm going to be no help here because I've never worked with source specific multicast.

SSM has a dedicated IP range within the multicast address space, and to my knowledge none of the common lighting control protocols are within that range, so you can probably ignore it.
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Old January 3rd, 2012   #5
SeanSill
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Ok, I saw mention of the SSM address range in the rfc. That clears up a considerable amount of my work then. In that case I can assume that all I essentially have to deal with is group queries and general queries?
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Old January 4th, 2012   #6
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That's a fair assumption. Most routers will allow you to configure SSM in any address range that you want (outside of the assigned space for SSM), but I've never seen it done.
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