All things related to multicast

[Danny McPherson <>]

Cool!  Any idea how many receivers and the max number of time a single router
had to duplicate a "stream"?  Thanks!

-danny

> 
> (This is a *very informal*, brief notification to the Internet2
> Multicast WG of today's news.  There will be a press release
> and so on, somewhere ["not my department"], so please, don't
> quote this.  Quote the press releases, etc.  And, I'm not one of
> the Principal Investigators, Project Mgr., etc.  I just worked
> on the multicast portion.)
> 
> 
> Today, the NASA Ames Biocomputation Center and NREN, and
> other NASA internal partners (e.g. Glenn Research Center),
> with participation from Abilene, CalREN-2, and local 
> networks at Stanford and UCSC (many thanks to all the
> participants), demonstrated a multicast-based telemedicine
> application, across NREN, Abilene, and CalREN-2, at a 
> data rate of 24 Mbits/sec (for today- we have done 50+ Mbits/sec
> over many of the paths).
> 
> [There was more to the demonstration than multicast, but, I assume
> that about all the Multicast WG needs to know is that this is a
> real biocomputation/telemedicine application, and that parts of the
> application use high-bandwidth multicast to deliver high-resolution
> dynamic imaging.]
> 
> This is native multicast all the way, with all external peering 
> network interfaces BGP4+ [MBGP], PIM-SM, MSDP enabled.  The links/
> routers were able to sustain the rates of 24 Mbits/sec native 
> multicast for long periods with minimal loss, in a WAN environment.
> 
> 
> So, besides being kind of cool, it raises the question again
> which was being discussed over the last couple of weeks: how
> many *LANs* are able to deliver multicast in the 25-100 Mbps
> range to "ordinary researchers" desktops, so that people can
> make use of what is now available on WANs.
> 
> 
> Hugh LaMaster
> NASA NREN
> 
> 
> P.S. Once again, thanks to all the network participants for their
> time and personal sacrifices on this.  Almost all of it actually 
> worked at demo time (!).
> 
> 
> --
>  Hugh LaMaster, M/S 233-21,    ASCII Email: 
> 
>  NASA Ames Research Center     Or:          
> 
>  Moffett Field, CA 94035-1000  No Junkmail: USC 18 section 2701
>  Phone: 650/604-1056           Disclaimer:  Unofficial, personal *opinion*.
>