Performance Counters

Performance counters reflect the performance data of Cisco CallManager. A counter is a variable whose name is stored in the Registry. Each counter is related to a specific area of system functionality. Examples include busy time of the processor, memory usage, and the number of bytes received over a network connection. Each counter is uniquely identified through its name and its path or location. In the same way that a file path includes drives, directories, subdirectories, and filenames, a counter path consists of four elements: the machine, the object (for example, processor or IP), the object instance (type of counter value; for example, interrupt), and the counter name (special counter itself).

Performance counters are ideal for administrators for system maintenance, analysis, and troubleshooting tasks:

  • An administrator needs to reset a voice gateway. With performance counters, it is possible to watch the system until the last call is disconnected and then reset the gateway.
  • A user reports that using Cisco CallManager Extension Mobility to log in to the phone takes a very long time. In analyzing the statistics produced with performance counter data, the administrator discovers high processor usage and memory allocation due to problems with processes on the system.
  • An administrator is dealing with a slow system. The system engineer has to decide whether system expansion is necessary or whether the current extensive system usage is only a one-time situation. To find out, the administrator should watch the system for a while.

Note

All performance counter values are based on system events and utilization information provided by the Microsoft Windows 2000 platform.

 

Performance Analysis

Microsoft Performance Monitor and Cisco Real-Time Monitoring Tool (RTMT) use Windows 2000 performance counters to monitor the system. Microsoft Performance Monitor, shown in Figure 31-1, reports both general and specific information in real time, whereas RTMT, shown in Figure 31-2, monitors focused Cisco CallManager performance by periodically polling Windows 2000 performance counter values.

Figure 31-1. Microsoft Windows 2000 Performance Monitor

Figure 31-2. Cisco Real-Time Monitoring Tool

RTMT provides optimized monitoring of performance objects and devices related just to the Cisco CallManager. The device information includes device registration status, IP address, description, and model type. RTMT provides clusterwide information that is stored in eight tables. The tables include IP phones, gateway devices, media, H.323 devices, Session Initiation Protocol (SIP) trunks, hunt lists, computer telephony integration (CTI), and voice messaging. RTMT also displays object and counter information that is kept by each Cisco CallManager node in the cluster. RTMT directly monitors the performance objects and counters.

Microsoft Event Viewer

Part I: Cisco CallManager Fundamentals

Introduction to Cisco Unified Communications and Cisco Unified CallManager

Cisco Unified CallManager Clustering and Deployment Options

Cisco Unified CallManager Installation and Upgrades

Part II: IPT Devices and Users

Cisco IP Phones and Other User Devices

Configuring Cisco Unified CallManager to Support IP Phones

Cisco IP Telephony Users

Cisco Bulk Administration Tool

Part III: IPT Network Integration and Route Plan

Cisco Catalyst Switches

Configuring Cisco Gateways and Trunks

Cisco Unified CallManager Route Plan Basics

Cisco Unified CallManager Advanced Route Plans

Configuring Hunt Groups and Call Coverage

Implementing Telephony Call Restrictions and Control

Implementing Multiple-Site Deployments

Part IV: VoIP Features

Media Resources

Configuring User Features, Part 1

Configuring User Features, Part 2

Configuring Cisco Unified CallManager Attendant Console

Configuring Cisco IP Manager Assistant

Part V: IPT Security

Securing the Windows Operating System

Securing Cisco Unified CallManager Administration

Preventing Toll Fraud

Hardening the IP Phone

Understanding Cryptographic Fundamentals

Understanding the Public Key Infrastructure

Understanding Cisco IP Telephony Authentication and Encryption Fundamentals

Configuring Cisco IP Telephony Authentication and Encryption

Part VI: IP Video

Introducing IP Video Telephony

Configuring Cisco VT Advantage

Part VII: IPT Management

Introducing Database Tools and Cisco Unified CallManager Serviceability

Monitoring Performance

Configuring Alarms and Traces

Configuring CAR

Using Additional Management and Monitoring Tools

Part VIII: Appendix

Appendix A. Answers to Review Questions

Index

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Authorized Self-Study Guide Cisco IP Telephony (CIPT)
Cisco IP Telephony (CIPT) (Authorized Self-Study) (2nd Edition)
ISBN: 158705261X
EAN: 2147483647
Year: 2004
Pages: 329
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