Chapter 7: Estimating Ethernet Network Performance


Overview

In Chapters 4 and 6, several models were developed and exercised to compute transmission delays, buffer memory requirements, and availability levels associated with the use of remote bridges and routers.

In Chapter 4, you did not have to consider the types of local area networks (LANs) to be connected other than noting that transmission delays and buffer memory requirement computations were based on several average frame sizes assumed to be flowing on a network. This enabled us to develop general models that can be tailored to a specific network environment by exercising a model with the appropriate frame size monitored or estimated to be carried by a network.

In Chapter 6, it was noted that the availability level of different network configurations are independent of the types of LANs to be connected. In this chapter we begin to focus attention on the performance requirements of specific types of LANs by examining the CSMA/CD access protocol. This will enable us to construct a model that reflects the transfer of frames on Ethernet, Fast Ethernet, and Gigabit Ethernet networks at different levels of network utilization. This, in turn , will provide us with a foundation for computing the maximum frame forwarding rate required to be supported by a bridge, router, or switch connected to an Ethernet network to ensure the device is fully capable of supporting the maximum level of Ethernet transmission. Similar to preceding chapters, both BASIC language programs and an Excel spreadsheet model will be developed and executed to facilitate exercising the mathematical models developed in this chapter.




Enhancing LAN Performance
Enhancing LAN Performance
ISBN: 0849319420
EAN: 2147483647
Year: 2003
Pages: 111
Authors: Gilbert Held

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