TCP Use and Performance on Internet 2
نویسندگان
چکیده
Sampled NetFlow data from a core Internet2 router are analyzed to characterize the current use and performance of Internet2, with particular emphasis on bulk TCP transfers. The distribution of throughput, transfer size, duration, and average packet size for 48,301 observed bulk TCPs is presented. The top 10% of bulk transfer TCPs achieved throughputs of 3.9 Mbps or greater, while the top 1% of bulk transfer TCPs achieved throughputs of 23 Mbps or greater. The median bulk transfer TCP throughput observed was 880 Kbps. Summaries of application and IP protocol mixes are presented. Popular applications included: NNTP (19.3% packets, 22.8% octets), active FTP (11.9% packets, 14.2% octets), HTTP (10.5% packets, 9.5% octets), and multicast (6.6% packets, 6.2% octets). Most used IP protocols were TCP (85.6% packets, 88.7% octets), UDP (12.5% packets, 10.0% octets), and ICMP (1.4% packets, 0.8% octets). Keywords— Internet2, Abilene, OC-48c, backbone, TCP, throughput, NetFlow.
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