XTT 5000 User's Manual
Technology: Ethernet Frame Size and Efficiency
Because each frame is followed by a frame gap and preamble, there is an inherent
inefficiency built into Ethernet traffic. The percentage of bandwidth lost to the 20
bytes of
IPG
and preamble is lower for larger frames than smaller frames, as shown:
Data size
Overhead
/frame
Frames/sec. Total
bits
lost
(oh)
% of
Bandwidth
Lost
64 Bytes
(512 bits)
160 bits
1,488,095
238,095,238
23%
128 Bytes
(1024 bits)
160 bits
844,594
135,135,135
13%
512 Bytes
(4096 bits)
160 bits
234,962
37,593,984
3.7%
1024
Bytes
(8192 bits)
160 bits
119,731
19,157,088
1.9%
1518
Bytes
(12144
bits)
160 bits
81,274
13,003,901
1.3%
Frame Rates
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