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Select between corporate IT or industrial Ethernet, Part 2

Posted: 21 Nov 2008     Print Version  Bookmark and Share

Keywords:packet rate  bandwidth utilisation  Ethernet 

Comparing the performance differences between business and industrial applications reveals that the packet rate, packet size and bandwidth utilisation of industrial applications exhibit characteristic opposite those of business applications. This article by Michael Roche of Schneider Electric examines the trade-offs between front office Ethernet and Industrial Ethernet.

Business applications have packet burst rate requirements that define the upper limit bandwidth requirement of the infrastructure. With multiple users sending packet bursts, 100Mbs from the edge to the core can easily be saturated. The data volume represents the larger packet sizes used by business, for example when loading Web pages or network printing. Industrial applications on the other hand, have a higher, steady-state packet rate with lower overall data volume due to the much smaller packet size. Industrial Ethernet packet sizes are typically less than 500 bytes. The smaller packets interleave more effectively than larger packets and therefore reduce the likelihood of congestion.

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