All things related to multicast

[Marty Hoag <>]

Alan:

   I think yours is a name from the past - maybe BITNET or SHARE days of
old or perhaps in connection with some software like a mailer (?) we once
used (gee - my memory is going fast!)?

   We have a sister campus (UND) looking at doing an I2 Day demo with the
CamVision2's for a music application (don't know all details but something
about chorus being at UND and the composer in California.  It could
probably be unicast for this.  But we're very concerned about the large
bandwidth since right now we only have a DS3 connection to I2/Abilene and
that is partially used for I1 traffic on part of the circuit.

   I've been told by Brian Shepard (he did a Violin Master Class demo at
the NLANR workshop recently) that the units needed about 30.8
megabits/sec.  Are there any ways to configure the systems in unicast mode
to trade off bandwidth and picture or audio quality (obviously for a
choral demo the audio is important)?  

   Thanks for any insight you have.

   Marty

On Wed, 15 Dec 1999, Alan Crosswell wrote:

> I have just learned from Litton that the Camvision2 multicast support does
> not do IGMP.  Is there an IGMP proxy available that I could use?  Am I
> correct in assuming that if I'm running pim-sm that I need IGMP to
> cause the tree to be built? I am also using Catalyst with cgmp or igmp
> snooping....
> 
> I have my Littons for another 7 days before the eval runs out and
> would like to try some IP multicast now that I've "finessed" unicast.
> 
> /a (still somewhat confused by most of this)
> 
>