Enhancing LAN Performance

Chapter 2: Ethernet, Token Ring, and ATM Frame and Cell Operations

Table 2.1: Ethernet Frame Overhead

Table 2.2: Gigabit Ethernet Frame Overhead

Table 2.3: Priority Bit Settings

Table 2.4: Frame Control Field Subfields

Table 2.5: IEEE Token Ring Functional Addresses

Table 2.6: Token Ring Addresses

Table 2.7: Token Ring Frame Overhead

Table 2.8: ATM Traffic Classes

Table 2.9: ATM Communications Operating Rates

Table 2.10: Relationship of Traffic Classes, AAL Support, and Traffic Definition Metrics

Table 2.11: ATM Cell Overhead

Chapter 3: Estimating Network Traffic

Table 3.1: Traffic Estimation Worksheet

Table 3.2: Completed Traffic Estimation Worksheet

Table 3.3: Projected Network Traffic by Workstation Class

Table 3.4: Network Growth Worksheet

Chapter 4: Understanding and Applying Waiting Line Analysis

Table 4.1: Program Listing of QUEUE.BAS

Table 4.2: Execution Results of Program QUEUE.BAS

Table 4.3: Comparing Single- and Dual-Path Queuing Values

Table 4.4: Program QUEUE2.BAS Program Listing

Table 4.5: Execution of QUEUE2.BAS

Table 4.6: Program Listing of UNITS.BAS

Table 4.7: Results Obtained from Executing Program UNITS.BAS with a Server Utilization Level of 0.375

Table 4.8: Program Listing of QVU.BAS

Table 4.9: Execution Results of Program QVU.BAS

Chapter 5: Sizing Communications Equipment and Line Facilities

Table 5.1: Experimental Modeling

Table 5.2: Traffic Conversion Table

Table 5.3: Factorial Values

Table 5.4: Traffic Lost and Traffic Carried by Rotary Position

Table 5.5: Traffic Analyzer Program Listing

Table 5.6: Traffic Analyzer Program Execution

Table 5.7: Analyzing the Effect of Port Expansion

Table 5.8: Traffic Capacity Planner Program

Table 5.9: Revised Traffic Planner Capacity Program

Table 5.10: Capacity Planner Program Execution

Table 5.11: Program to Generate Table of Grades of Service Using the Erlang Distribution

Table 5.12: Erlang B Distribution Extracts

Table 5.13: Individual Port Traffic Statistics

Table 5.14: Poisson Distribution Arrival (Rate of Two Per Unit Time)

Table 5.15: POISSON.BAS Program Listing

Table 5.16: Poisson B Distribution Extracts

Table 5.17: PC Traffic Survey

Table 5.18: Poisson Distribution Program Extract

Table 5.19: Channel Requirements Summary

Chapter 6: Using the Availability Level as a Decision Criterion

Table 6.1: System Availability Comparison

Table 6.2: Program Listing of AVAIL.BAS

Table 6.3: Program AVAIL.BAS to Compute Availability Levels

Table 6.4: Program AVAIL.BAS to Compute Availability Levels

Table 6.5: Program AVAIL.BAS to Compute Availability Levels

Chapter 7: Estimating Ethernet Network Performance

Table 7.1: IEEE 802.3 (Ethernet) Frame Format

Table 7.2: Ethernet Frame Processing Capability (Frames per Second)

Table 7.3: Gigabit Ethernet Frame Processing Capability (Frames per Second)

Table 7.4: Program Listing of EPERFORM.BAS

Table 7.5: Execution of Program EPERFORM.BAS

Table 7.6: Program Listing of GBITPFRM.BAS

Table 7.7: Execution Results of Program GBITPFRM.BAS

Table 7.8: Program Listing of EITR.BAS

Table 7.9: Information Transfer Rate versus Average Frame Length

Table 7.10: Program Listing of GITR.BAS

Table 7.11: Execution Results of Program GITR.BAS

Table 7.12: Link Speed versus Frame Rate

Chapter 8: Estimating Token Ring Network Performance

Table 8.1: Program Listing of TPERFORM.BAS

Table 8.2: Frame Rate of a 4-Mbps Token Ring Network

Table 8.3: Frame Rate of a 16-Mbps Token Ring Network

Table 8.4: Frame Rate versus Number of Network Stations

Table 8.5: TRWAN.BAS Program Listing

Table 8.6: Results Obtained from Executing TRWAN.BAS

Table 8.7: Results Obtained from Executing Program TRWAN.BAS with a 20-percent Protocol Overhead

Table 8.8: Results Obtained from Executing TRWAN.BAS Using a Data Compression Ratio of 2 and a Protocol Overhead of 15 Percent

Chapter 9: ATM Performance

Table 9.1: AAL Payload Capacity

Table 9.2: LANE Delay Components

Table 9.3: Single-Channel, Single-Phase Formulas for Poisson Arrivals And Constant Service Times

Chapter 10: Working with Images

Table 10.1: Maximum Color Support versus Bits-per-Pixel

Table 10.2: Text versus Image Storage

Table 10.3: Common Raster Image File Extensions, Sources, and Color Depth Support

Table 10.4: Common Image File Formats

Table 10.5: Comparing Image Format Storage Requirements

Table 10.6: Variables to Consider When Selecting a Web Server WAN Connection Rate

Table 10.7: Steps in the WAN Operating Rate Estimation Process

Chapter 11: Using Intelligent Switches

Table 11.1: Types of Ethernet Switches Based on Port Operating Rates

Table 11.2: Ethernet Switch Features

Table 11.3: Rule-Based vLAN Creation Examples

Chapter 12: LAN Monitoring Tools

Table 12.1: Vendor Contacts

Chapter 13: Transmission Optimization Techniques

Table 13.1: Using LZW Compression for Encoding the String "ababc"