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Managing System Performance This chapter describes the basic tasks that you can perform to manage the general system performance. For a complete description of the performance management commands in this chapter, refer to the “Performance Management Commands” chapter of the Configuration Fundamentals Command Reference. To locate documentation of other commands that appear in this chapter, use the command reference master index or search online. System Performance Management Task List Perform any of the tasks in the following sections to manage system performance: • Set the Interval for Load Data • Limit TCP Transactions • Configure Switching and Scheduling Priorities • Establish Queueing and Congestion Strategies • Configure Generic Traffic Shaping • Modify the System Buffer Size In addition, most chapters in this guide include performance tasks specific to the chapter content, and the Internetworking Design Guide includes detailed information on performance issues that arise when designing a network. See the “Performance Management Examples” section at the end of this chapter for examples. Set the Interval for Load Data You can change the period of time over which a set of data is used for computing load statistics. Decisions, such as dial backup decisions, are dependent on these statistics. If you decrease the load interval, the average statistics are computed over a shorter period of time and are more responsive to bursts of traffic. To change the length of time for which a set of data is used to compute load statistics, perform the following task in interface configuration mode: Task Command Set the length of time for which data is used for load calculations. load-interval seconds Managing System Performance FC-357
Limit TCP Transactions Limit TCP Transactions When using a standard TCP implementation to send keystrokes between machines, TCP tends to send one packet for each keystroke typed, which can use up bandwidth and contribute to congestion on larger networks. John Nagle’s algorithm (RFC 896) helps alleviate the small-packet problem in TCP. The first character typed after connection establishment is sent in a single packet, but TCP holds any additional characters typed until the receiver acknowledges the previous packet. Then the second, larger packet is sent, and additional typed characters are saved until the acknowledgment comes back. The effect is to accumulate characters into larger chunks, and pace them out to the network at a rate matching the round-trip time of the given connection. This method is usually good for all TCP-based traffic. However, do not enable the Nagle slow packet avoidance algorithm if you have XRemote users on X Window sessions. By default, the Nagle algorithm is not enabled. To enable the Nagle algorithm and thereby reduce TCP transactions, perform the following task in global configuration mode: Task Command Enable the Nagle slow packet avoidance algorithm. service nagle Configure Switching and Scheduling Priorities The normal operation of the network server allows the switching operations to use as much of the central processor as is required. If the network is running unusually heavy loads that do not allow the processor the time to handle the routing protocols, you might need to give priority to the system process scheduler. To do so, perform the following task in global configuration mode: Task Command Define the maximum amount of time that can scheduler interval milliseconds elapse without running the lowest-priority system processes. To change the amount of time that the CPU spends on fast switching and process level operations on the Cisco 7200 series and Cisco 7500 series, perform the following task in global configuration mode: Task Command For the Cisco 7200 series and Cisco 7500 series, change the default time the CPU spends on process tasks and fast switching. Caution Cisco recommends that you do not change the default values of the scheduler allocate command. FC-358 Configuration Fundamentals Configuration Guide scheduler allocate network-microseconds process-microseconds
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Instituto Tecnológico de Costa Ric
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AGRADECIMIENTO Agradezco a los Inge
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Abstract The main objective of this
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5.3 PROGRAMACIÓN DE LAS INTERFACES
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FIGURA 6.5 GRÁFICO QUE MUESTRA LA
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CAPÍTULO 1: INTRODUCCIÓN 11
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El proyecto de graduación se reali
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1.4 Objetivos Específicos 1. Reali
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CAPÍTULO 2: ANTECEDENTES 17
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La figura 2.1 muestra un diagrama d
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SWITCH 0 SWITCH 1 SWITCH 2 SWITCH 7
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2.3 Solución propuesta Se desea en
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SWITCH 0 SWITCH 1 SWITCH 2 SWITCH 7
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CAPÍTULO 3: PROCEDIMIENTO METODOL
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3.3 Escoger diferentes métodos par
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3.10 Distribución física Esta eta
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Como ya se ha mencionado anteriorme
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Del mismo modo, los router cuentan
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Figura 4.3 Módulo serial de un pue
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Figura 4.9 Tarjeta de Interfaz de v
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Packeteer (Intelligent Bandwidth Ma
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Sistema Global de Posicionamiento U
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Figura 4.13 Vista frontal del GPS M
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5.1 Configuración de voz sobre IP
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El valor interfaz se reemplaza con
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Figura 5.2 Segmentos de llamada vis
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eq-qos [ best-effort | controlled-l
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Los números de teléfono se pueden
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El siguiente paso consiste en progr
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Tabla 5.4 Descripción de los coman
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5.5 Configuración de los puertos d
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destino específico. “número1”
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5.6 Configuración del Puente Inal
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La figura 5.4 muestra una vista gen
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Diagnostics: permite realizar prueb
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Frequency: establece la frecuencia
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CAPÍTULO 6: ANÁLISIS Y RESULTADOS
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La figura 6.10 muestra un gráfico
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Figura 6.3 Eficiencia de la red de
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Figura 6.7 Gráfico que muestra la
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Figura 6.11 Gráfico que muestra la
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Unisys de Centroamérica desea tras
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6.2.3 Segmentos de Red También se
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hUNISYS : es la altura completa del
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Figura 6.15 Diagrama de la ubicaci
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La altura de 13.05 metros de la tor
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CAPÍTULO 7: CONCLUSIONES Y RECOMEN
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No se requiere que en Unisys de Cen
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ANEXOS 98
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ANEXOS 96
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Configuring Voice Ports This chapte
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Validation Tips Step Command Purpos
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Step Command Purpose Configuring E&
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Validation Tips Fine-Tuning E&M Voi
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Activating the Voice Port Step Comm
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• Activating the Voice Port Confi
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Fine-Tuning FXO and FXS Voice Ports
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Step Command Purpose Configuring E&
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Validation Tips Step Command Purpos
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Step Command Purpose Fine-Tuning E&
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Anexo 2: Configuración de VoIP en
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2 Voice over IP Quick Start Guide
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Installing Voice Network Modules an
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Installing Voice Network Modules an
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Voice Port Numbering Voice Port Num
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Entering Configuration Mode Enterin
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Configuring the IP Network for Real
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Configuring the IP Network for Real
Page 137 and 138: Configuring FXS Interfaces Configur
Page 139 and 140: Configuring FXS Interfaces 18 Voice
Page 141 and 142: Configuring FXS Interfaces Wild Car
Page 143 and 144: Configuring FXS Interfaces 22 Voice
Page 145 and 146: Configuring FXO Interfaces Configur
Page 147 and 148: Configuring E&M Interfaces Configur
Page 149 and 150: Configuring E&M Interfaces 28 Voice
Page 151 and 152: List of Terms List of Terms This se
Page 153 and 154: Cisco Connection Online Cisco Conne
Page 155 and 156: CHAPTER Configuring Voice over IP f
Page 157 and 158: Prerequisites Tasks Prerequisites T
Page 159 and 160: Configuration Tasks To configure Vo
Page 161 and 162: Configure RSVP for Voice Enable RSV
Page 163 and 164: You should configure Multilink PPP
Page 165 and 166: Enable RTP Header Compression on a
Page 167 and 168: Frame Relay for Voice over IP Confi
Page 169 and 170: Table 2-1 Sample Number Expansion T
Page 171 and 172: Figure 2-5 Outgoing Calls from the
Page 173 and 174: Configure POTS Peers To configure t
Page 175 and 176: Configure VoIP Peers Verify Tips Co
Page 177 and 178: • Call progress tone using the cp
Page 179 and 180: Fine-Tune FXO and FXS Voice Ports T
Page 181 and 182: Validation Tips Step Command Purpos
Page 183 and 184: Step Command Purpose Fine-Tune E&M
Page 185 and 186: Configure CODEC and VAD for Dial Pe
Page 187: Step 8 Click the Up button until th
Page 191 and 192: Establish Queueing and Congestion S
Page 197 and 198: Modify the System Buffer Size To di
Page 199 and 200: Performance Management Examples The
Page 201 and 202: 4-2 • output attenuation • port
Page 203 and 204: Command Syntax Conventions Command
Page 205 and 206: acc-qos 4-6 Example The following e
Page 207 and 208: answer-address 4-8 Example The foll
Page 209 and 210: comfort-noise comfort-noise 4-10 To
Page 211 and 212: cptone cptone 4-12 To configure a v
Page 213 and 214: description description To include
Page 215 and 216: destination-pattern 4-16 Related Co
Page 217 and 218: dial-peer voice dial-peer voice 4-1
Page 219 and 220: echo-cancel coverage echo-cancel co
Page 221 and 222: echo-cancel enable echo-cancel enab
Page 223 and 224: fax-rate fax-rate 4-24 To establish
Page 225 and 226: icpif icpif 4-26 To specify the Cal
Page 227 and 228: input gain input gain To configure
Page 229 and 230: ip udp checksum ip udp checksum 4-3
Page 231 and 232: non-linear non-linear 4-32 To enabl
Page 233 and 234: operation operation To select a spe
Page 235 and 236: port port 4-36 To associate a dial
Page 237 and 238: eq-qos req-qos 4-38 To specify the
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ing number ring number To specify t
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session target session target 4-42
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show call active voice show call ac
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show call active voice 4-46 Table 4
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show call history voice show call h
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show call history voice 4-50 Table
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show dial-peer voice 4-52 The follo
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show dialplan incall number show di
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show num-exp show num-exp 4-56 To s
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show voice port 4-58 Voice card spe
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show voice port 4-60 Table 4-7 Show
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shutdown (voice-port configuration)
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signal 4-64 Note If you change the
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snmp-server enable traps snmp-serve
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snmp-server enable traps 4-68 The s
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timeouts initial timeouts initial 4
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timing clear-wait timing clear-wait
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timing delay-start timing delay-sta
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timing digit timing digit To specif
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timing pulse timing pulse To specif
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timing wink-duration timing wink-du
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type type 4-82 To specify the E&M i
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vad vad 4-84 To enable voice activi
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Anexo 4: Guía de antenas y accesor
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Table 26-15: Physical and Environme
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Software Ordering Information Softw
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Installation Notes Installation Not
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Anexo 5: Manual de usuario de los p
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THE SPECIFICATIONS AND INFORMATION
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Contents About the User’s Guide .
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Contents iii Setting the Forwarding
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Chapter 9 - Viewing Statistics Cont
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Appendix A -Aironet 340 Series Brid
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x Aironet 340 Series Bridge Chapter
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xii Aironet 340 Series Bridge Welco
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xiv Aironet 340 Series Bridge Radio
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xvi Aironet 340 Series Bridge Paren
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xviii Aironet 340 Series Bridge The
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Part 1 - Getting Started Part 1 - G
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1 - 2 Aironet 340 Series Bridge Bef
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1 - 4 Aironet 340 Series Bridge 2.
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1 - 6 Aironet 340 Series Bridge Ins
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1 - 8 Aironet 340 Series Bridge Att
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1 - 10 Aironet 340 Series Bridge Ty
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Chapter 2 - Accessing the Console S
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Sub-Menus Each menu contains the fo
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Accessing the Console System 2 - 5
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Web Access Accessing the Console Sy
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Accessing the Console System 2 - 9
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Using the Configuration Console Men
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Controlling SNMP access to the conf
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Setting the Communication Port Para
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Monitoring of the DTR Signal Access
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Chapter 3 - Before You Begin CHAPTE
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Before You Begin 3 - 3 Time: Used t
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Chapter 4 - Configuring the Radio N
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Using the Configuration Radio Menu
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Configuring the Radio Network 4 - 5
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Packet Encryption (Privacy Menu) Co
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Viewing Errors (Errors) Configuring
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Roaming Notification Mode (Roaming)
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Chapter 5 - Configuring the Etherne
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Configuring the Ethernet Port 5 - 3
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6 - 2 Aironet 340 Series Bridge Usi
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6 - 4 Aironet 340 Series Bridge 2.
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Chapter 7 - Configuring Mobile IP C
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Configuring Mobile IP 7 - 3 On a fo
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Configuring Mobile IP 7 - 5 work. T
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Chapter 8 - Using the Spanning Tree
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Understanding Loops Using the Spann
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Using the Spanning-Tree Protocol 8
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Establishing Timeouts Node Address
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Using the Configuration STP Menu (R
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Setting the Local Port Priority (Pr
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Viewing the Port State (State) Usin
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Chapter 9 - Viewing Statistics CHAP
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Throughput Statistics (Throughput)
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Error Statistics Viewing Statistics
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Displaying Overall Status (Status)
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Viewing Statistics 9 - 9 2. Type th
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Displaying Node Information (Node)
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Chapter 10 - Setting Up the Associa
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Using the Association Menu Setting
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Setting Up the Association Table 10
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Setting Up the Association Table 10
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Chapter 11 - Using Filters CHAPTER
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Using Filters 11 - 3 n Both: Packet
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Filtering Node Addresses (Node) Usi
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Displaying the IP to Network Addres
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Setting the Default Action (Default
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Í To Add a Filter Using the Monito
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If you type llc: a. When you select
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Using Filters 11 - 15 The contents
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Chapter 12 - Setting Up Event Logs
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Setting Up Event Logs 12 - 3 Node
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Error Logs Severe Error Logs “Cat
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Lost our association, new specified
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Setting Up Event Logs 12 - 9 NOTE:
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Setting Statistic Parameters (Stati
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The following trap messages will be
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Chapter 13 - Performing Diagnostics
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Performing Diagnostics 13 - 3 are d
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Physically Locating a Unit (Find) P
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Performing Diagnostics 13 - 7 4. Th
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Performing Diagnostics 13 - 9 5. Se
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Performing Diagnostics 13 - 11 4. I
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Performing Diagnostics 13 - 13 If t
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Appendix A - Aironet 340 Series Bri
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Console Port Pin-Out The Console Po
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B-2 Aironet 340 Series Bridge Conti
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B-4 Aironet 340 Series Bridge Broad
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B-6 Aironet 340 Series Bridge Desti
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C-2 Aironet 340 Series Bridge The I
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C-4 Aironet 340 Series Bridge The I
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C-6 Aironet 340 Series Bridge The U
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C-8 Aironet 340 Series Bridge The S
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C-10 Aironet 340 Series Bridge MIBI
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C-12 Aironet 340 Series Bridge The
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Appendix E - Regulatory Information
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Department of Communications—Cana
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E-5
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LATIN AMERICA AND CARIBBEAN GROUP G
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LATIN AMERICA AND CARIBBEAN GROUP C
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