All things related to multicast

[Bill Owens <>]

At 9:52 -0500 11/9/01, Dave Hartzell wrote:
> Hello-
>
> I've been testing IPerf (v1.1.1) in multicast mode and I seem to be 
> running into a limit of 11 mbit/s when sending or receiving a 
> multicast stream.
>
> I'm using two BSDI 4.2 boxes with 3C905 cards connected to the same 
> Cisco 2900 XL switch.

I have two Debian GNU/Linux 2.2r4 (potato) boxes, both Celeron 400 
with 3C905C, connected to the same Cisco 3548 switch running 
12.0(5.2)XU (XU?! what the heck is that?)

Using similar commands, but with 128KB windows on both ends, I get up 
to about 50Mbps with very little loss. Above 55-60Mbps, though, I see 
periodic loss every every 4th second; not sure where that's coming 
from, but I also get it with unicast UDP. I don't have any 'real' 
multicast traffic at that bandwidth to compare with.

If you'd like to test over the wide area I should be able to source 
or sink 25-30Mbps over my creaky old Cisco 7200. . .

Bill.