RE: Ethernet Characteristics re: packet loss
This is a rule of thumb used in shared Ethernet due to the effect of
collisions on throughput. It does not apply to Switch Ethernet.
From: Stout, Tony [mailto:StoutT@xxxxxxxxxxxx]
Sent: Monday, March 19, 2001 10:51 AM
Subject: Ethernet Characteristics re: packet loss
I have a quick question.... someone made a statement that it is a
characteristic that once you go above 40% LAN capability, the you will begin
to lose packets. This doesn't seem to hold water with me. I recently
performed a test whereby we injected packets at 100%, 75%, 50%, 25% 10% & 5%
network capability. We had 2 laptops, 1 desktop (PIII dual processor), a
LAN Analyzer, and a SmartBits 200 generator -- at 100% both the laptops 40%
of the packets we were sending -- the desktop captured 70% --- in both cases
the application running on the platforms was using 100% of the processing
time. -- my suspicion is that this is where the packets are being loss -- in
the processing arena.
Can you shed any light on this?
Information Systems Test Director
Mobile: (301) 399-9078
JITC Webpage: http://misd.ncr.disa.mil/misd
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