🚀 go-pugleaf

In article <1992Sep7.033322.2877@menudo.uh.edu>, stan@casc.math.uh.edu (Stan Hanks) writes:
> ...
> >what is the maximum forwarding rate (either bridging or routing) in
> >Bytes/sec between any pair of stations?
> 
> Correct. These stations are packaging LAN traffic into closed user groups
> built out of TCP/IP streams. Their transmission  rates are limited by input 
> rates into them. I'm (supposedly) going to have an opportunity to test this 
> stuff in a multi-VAX environment running LAVC over FDDI (plus some other 
> stuff) Real Soon. Until then, I won't have any real "fully loaded testing"
> info. The best I've seen to date is ~35 Mb/s end-to-end, and I know
> that's a function of how the data is getting into the FDDI node (i.e.
> the bottleneck is *known* to be elsewhere in the system).


35Mbit/sec won't get close to the 8 ms TTRT bandwidth limit.

There are several well established TCP/IP/FDDI implementations that can
do > 35Mb/s in a single TCP stream.

It sounds to me as if you're situation will need a large TTRT when your
forwarders start wanting to saturate the link.  It sounds as if any
hopes based on the slowness of stations are not relevant, since it
doesn't take many of even the slowest useful FDDI stations to hit 100
Mb/s in aggregate.


Vernon Schryver,  vjs@sgi.com