[openib-general] some IB multicast sendonly thoughts

[Eitan Zahavi]

Or Gerlitz wrote:
> Eitan Zahavi wrote:
>   
>> Or Gerlitz wrote:
>>     
>>> OK, assuming my setup consists of:
>>> +1 IB node doing only multicast TX on a group
>>> +2 an IB/Ethernet gateway
>>> 3+ Eth node doing only multicast RX on the equiv mac (forget manytoone)
>>>       
>
>   
>>> The gateway design is to register for SA MGID IN/OUT traps and when it 
>>> gets MGID IN it joins the the mgroup as ***NonMember** etc
>>>       
>
>   
>> GW needs to listen on IGMP on the Eth port...
>>     
>
> this was fast... thanks for jumping on it.
>
> So you are saying that the GW **has** to listen on IGMP at the Eth side 
> and **has** to do IB SA join in the only way that forces the SA to 
> create the group --> FullMember ?
>   
Yes
> If indeed, this is kind of bad, 
I find it very reasonable
> I find the approach of the GW being 
> "transparent" to the SA in the sense that it does not cause mgroup 
> create/destroy nor mgroup ref count inc/dec much more robust, so you are 
> saying its not feasible with the IB spec.
>
> Or.
>
>
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