Re: [magma] RE: FW: WGLC: draft-ietf-behave-multicast-06.txt

Alvaro Fernandez wrote:
> Brian:
> 
>  
> 
> My e-mail was not an answer to Albert, sorry for that,
> 
>  
> 
> It is an idea regarding the BEHAVE Internet Draft and how the multicast
> NAPT can allow outside multicast routers to uniquely identify different
> multicast SSM channels (S,G) coming from inside interfaces in the case
> two inside interfaces use the same multicast group.
> 

How prevalent do people expect the scenario of a SSM sender being
located behind a NAPT?

>  
> 
> In the BEHAVE draft, REQ-4, if there is a host on the inside interface
> sending UDP packets to a multicast group, the NAPT can change the source
> address and the port but not the multicast group address. In this way, I
> think the outside routers can not differentiate the two channels because
> they have the same source (the public interface) and the same multicast
> group address.
> 

Is it possible for the NAPT to have multiple external addresses to use
as source addresses?

>  
> 
> Allowing the NAPT to change the multicast group address in the case two
> sender behind the NAPT use the same group address in a similar way the
> NATP changes a UDP port is a possible solution. There are other
> possibilities.

>From the global perspective, how does a receiver outside the NAPT know
the (S,G) combination to join?

Regards,
Brian


_______________________________________________
MBONED mailing list
[email protected]
https://www1.ietf.org/mailman/listinfo/mboned