The figures below reflect the behavior of continuous sequences of packets (`packet trains') of similar size. We call packet trains of this type `troops'. We have binned the packets by size at bucket boundaries of 44, 90, 180, 260, 576, 1120, and >1121 bytes for more manageable analysis. Here we present the resulting distributions of packet troop lengths for these 5 size ranges. The first figure shows the distribution in one direction on the link, while the second figure shows the distribution in the other direction. Each line in the graph shows a histogram of the number of troops within a specific size range seen in the trace.
This analysis was based on a 7 minute OC3mon trace captured on March 12, 1998 at the FIX-West network interconnection point. The trace contained 5.7 million packets, and 2.6 GB of data. Note that these results are directly comparable to the CAIDA paper presented at Inet 98[Claffy98a]. The results are quite similar to figures 9a, and 9b in that paper despite the fact that the data came from a public exchange point rather than inside a private backbone.