The IP over ATM Mailing List Archive by date

[Rick Bubenik <rick@stl.nexen.com>]

> From curtis@brookfield.ans.net Wed Oct 18 10:25 CDT 1995
> Subject: Re: Multicasting with ATM - a concern 
> 
> In message <199510180602.IAA00941@lohi.dat.tele.fi>, Juha Heinanen writes:
> >    There is an alternative that allows AAL5 to be used for mpt-to-mpt
> >    connections.  Namely, set up the connection as a switched VP and
> >    either: 1) allocate a unique VCI to each transmitter
> > 
> > this is worth considering now that we have switched VP capability in uni
> > 4.0 signalling and thatfwhich many switches have already implemented for
> > soft pvp purposes.
> > 
> > i don't remember how AAL3/4 implements MID allocation, but vci allocation
> > protocol could be something similar.
> > 
> > -- juha
> 
> Would the 8 bit VPI field then limit us to 256 multicast groups on a
> given switch?
> 
> Curtis

The 8 bit VPI field would limit the number of multicast groups (supported
by switched VPs) on a UNI to 256.  Since the NNI VPI field is 12 bits,
the number per NNI link would be 4096.  Note that both of these are per
link limits and not per switch limits.

	rick