[ih] Why was DVMRP put into IGMP?

[Craig Partridge]

I should remember (I was the PI of the BBN project that collaborated in
implementing DVMRP with Steve Deering).  But I don't.

I'll see if I can hunt down an answer.

Thanks!

Craig

John Kristoff writes:
> I'm curious why DVMRP was put into IGMP, as opposed to being put on top
> of UDP or perhaps even as an extension to RIP, which DVMRP's close
> cousin used.
> 
> Maybe the use of IGMP by DVMRP was just to keep IP multicast protocols
> essentially together, or was there some other rationale?
> 
> No other IP multicast routing protocol that I'm aware went this route
> and only a small handful of little used measurement features ended up
> going into IGMP, performing something beyond its core functionality of
> group membership maintenance.
> 
> Perhaps Steve Deering or something who was involved in this early work
> can shed some light on the original ideas?  Thank you,
> 
> John
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