Re: [MMUSIC] BUNDLE and SCTP

[Paul Kyzivat <[e-mail]>]

On 4/9/14 5:27 AM, Christer Holmberg wrote:
> Hi,
>
>>> Now, if you run multiple SCTP associations on top of that DTLS connection, you would use the SCTP port number to distinguish them.
>>
>> Or the PPID on individual frames.  The data channels draft doesn't really describe what to do with unknown PPIDs, but it could.
>
> Actually, if you have multiple SCTP associations within a BUNDLE group, none of the above would work. Because, you could end up using the same SCTP port numbers in each SCTP association.

If "two" SCTP associations have the same 5-tuple and the same SCTP ports 
on both ends then they are not really separate SCTP associations.

If the goal is to have two in the same bundle group, sharing the same 
5-tuple, then there must be a different SCTP port to distinguish them. 
That would have to be part of the rule for associating packets with 
m-lines in the bundle group.

If you wanted to associate to m-lines based on PPID, then you would need 
PPID-specific media sections. We don't currently have a way to do that.

	Thanks,
	Paul