Title :
A hybrid network traffic engineering system
Author :
Yan, Zhenzhen ; Tracy, Chris ; Veeraraghavan, Malathi
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Virginia, Charlottesville, VA, USA
Abstract :
This paper describes traffic analysis undertaken to answer certain questions needed to design a hybrid network traffic engineering system (HNTES). The hybrid network in question consists of an IP-routed network and a dynamic virtual-circuit network, and the role of HNTES is to identify and redirect α-flows, which are defined as flows in which the number of bytes exceeds a threshold H (1 GB) over at least one α-interval (1 minute). NetFlow data from ESnet was analyzed. Our findings show that raw IP α-flows (identified by the 5-tuple) are mostly short-lived (80% are shorter than 2 minutes), which implies that HNTES should use an offline mechanism for identifying α-flows and preconfiguring policy-based routes to redirect packets for these flows to virtual circuits since setup delay is about 1 minute. An offline mechanism using prefix flow identifiers (/32 source and destination IP addresses or /24 source and destination subnets) appears to be highly effective because α-flow generating sources and sinks typically have static public IP addresses. For example, an analysis of two months of NetFlow data from an ESnet router shows that more than 94% of the total number of bytes from α-flows would have been redirected had a /24 based offline HNTES solution been deployed.
Keywords :
IP networks; telecommunication network routing; telecommunication traffic; ESnet router; HNTES; IP α-flows; IP-routed network; NetFlow data; dynamic virtual-circuit network; hybrid network traffic engineering system; policy-based route; static public IP address; traffic analysis; Aggregates; Artificial intelligence; Delay; IP networks; Laboratories; Routing; Servers;
Conference_Titel :
High Performance Switching and Routing (HPSR), 2012 IEEE 13th International Conference on
Conference_Location :
Belgrade
Print_ISBN :
978-1-4577-0831-2
Electronic_ISBN :
Pending
DOI :
10.1109/HPSR.2012.6260841