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Set A 500usec Packet Inter-Arrival Time

The following section shows the difference between automatically allowing the interface to detect the line speed and explicitly setting the line speed of an interface for 500usec packet inter-arrival time.

The following Figures show that for both the 10Mbit/sec and 100Mbit/sec line speeds, explicity setting the line speed caused the time stamp values to be slightly more consistent than when allowing the interface to detect the line speed. This was more true for the 10Mbit/sec line speed, as the outliers in Figure 2 are no longer present as seen in Figure 3.

Figure 2: Automatic 10Mbit/sec	Figure 3: Explicit 10Mbit/sec
Figure 4: Automatic 100Mbit/sec	Figure 5: Explicit 100Mbit/sec

The Tables below show the small improvement in variance and standard deviation occuring when the line speed was explicitly set to either 10Mbit/sec or 100Mbit/sec.

Table 1: Automatic 10Mbit/sec (usec)

Mean	Variance	Standard Deviation
583.251	1.012	1.006

Table 2: Explicit 10Mbit/sec (usec)

Mean	Variance	Standard Deviation
583.251	0.982	0.991

Table 3: Automatic 100Mbit/sec (usec)

Mean	Variance	Standard Deviation
508.364	0.973	0.986

Table 4: Explicit 100Mbit/sec (usec)

Mean	Variance	Standard Deviation
508.364	0.927	0.963

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