user manual
Table Of Contents
- User Guide for Internetwork Performance Monitor
- Contents
- Preface
- Overview of IPM
- Getting Started With IPM
- Using IPM to Measure Network Performance
- Measuring Network Performance for DHCP
- Measuring Network Performance for DLSw
- Measuring Network Performance for DNS
- Measuring Network Performance for HTTP
- Measuring Network Performance for FTP
- Measuring Network Performance for IP
- Measuring Network Performance for SNA
- Measuring Network Performance for TCP
- Measuring Network Performance for UDP
- Measuring Network Performance for Enhanced UDP
- Modifying IPM Components
- Working With Source Devices
- Working With Target Devices
- Working With Operations
- Working With Collectors
- Adding Components Using Seed Files
- Changing IP Addresses
- Setting the Baseline
- Setting IPM Database Preferences
- Setting SNMP Timeout and Retry Environment Variables
- Setting New IPM Server Process Timeout Values
- Setting the DISPLAY Variable in Solaris
- Backing Up or Restoring the IPM Database
- NVRAM Settings
- Managed Source Interface Settings
- Changing Administrative Password
- Changing IPM Database Password
- Working With Message Log Window
- Working With IPM From the CiscoWorks Homepage
- Accessing IPM Data From the CiscoWorks Homepage
- Viewing IPM Server Information
- Importing Devices From Device and Credential Repository
- Downloading the IPM Client
- Viewing Configuration Information
- Viewing Latency Data
- Viewing Jitter Data
- Viewing HTTP Data
- Accessing Software Updates and Additional Information
- IPM FAQs and Troubleshooting Tips
- IPM Command Reference
- SA Agent Feature Mapping
- Glossary
- Index
3-8
User Guide for Internetwork Performance Monitor
OL-11291-01
Chapter 3 Using IPM to Measure Network Performance
Measuring Network Performance for DNS
Measuring Network Performance for DNS
DNS operation latency is computed by measuring the time between sending a DNS request and receiving
a reply. The operation queries for an IP address if you specify a host name, or queries for a host name if
you specify an IP address. The DNS operation also measures availability and errors for DNS services.
To measure end-to-end performance for DNS:
Step 1 Define a device as the source device from which to measure performance. For details on defining a
source device, see Defining a Source Device.
To control how statistics are collected, use the DefaultDNS operation or define your own DNS operation.
For details on defining a DNS operation, see Defining a DNS Operation.
Step 2 Define a collector to measure performance between the source router and DNS server. For details on
defining a collector, see Defining a Collector. If you set the collector’s schedule to On Demand, start
the collector when desired.
Step 3 View the statistics in the DNS Historical Statistics window. For details on viewing end-to-end statistics
for DNS, see Viewing Statistics for DNS.
Defining a DNS Operation
IPM provides a default DNS operation for measuring performance between a source and a DNS server.
In addition, IPM provides the option to create, modify, or delete your own DNS operations from the DNS
Operation Configuration window.
To define a DNS operation:
Step 1 From the IPM Main Window, select Edit > Configuration.
The Configuration window appears.
Step 2 Click Operation.
The Operation Configuration window appears within the Configuration window.
Step 3 Click DNS.
The DNS Operation Configuration window (Figure 3-5) appears.
Step 4 In the Name field, enter a descriptive name to assign to for the operation. In the Description field, you
can enter a brief description of the operation, including its purpose.
Step 5 In the DNS Name Server field, enter the host name or IP address for the DNS name server.
IPM automatically creates the DefaultDNS operation at startup based on the DNS server configuration
of the IPM server.