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
A-7
User Guide for Internetwork Performance Monitor
OL-11291-01
Appendix A IPM FAQs and Troubleshooting Tips
IPM FAQs
Q.
How frequently can network performance measurements be taken?
A.
SA Agent generates several measurements per hour, then IPM polls the router once per hour and
collects summarized statistics for that period. You can set the sampling interval for SA Agent for as
often as every 10 seconds, but for optimal performance, we recommend a sample interval of at least
60 seconds (1 minute). This is the default value.
You can view up-to-date real-time statistics in the Real Time Statistics window as SA Agent collects
the data from the collector. However, IPM does not store the real-time data in the IPM database. IPM
stores only the hourly summarized data in the IPM database.
Q.
When IPM collects the data from the SA Agent using SNMP, is this data averaged or summarized
in any way?
A.
The data is summarized and averaged in a variety of ways. IPM displays the data in the Historical
Statistics window in hourly, daily, weekly, and monthly increments. IPM also displays average,
minimum, and maximum calculations of the data over the monitoring period. IPM also provides an
automatic aging facility for summarizing and aging older data.
Q.
What data collectors are available in IPM 2.6?
A.
IPM Release 2.6 provides support for the following types of operations:
• DHCP Echo
• DLSw Echo
• DNS Echo
• Enhanced UDP with Jitter Monitoring
• HTTP Connect
• ICMP Echo
• ICMP Path Echo
• SNA Echo
• TCP Connect
• UDP Echo
• FTP
This release also provides support for Loose Source Routing and Quality of Service.
Q.
For TCP Connect operations, what port numbers does IPM support?
A.
You can make a TCP connection to any port number, well known or otherwise, on any IP host, Cisco
or non-Cisco, as long as someone is listening on that port on the target.
If you specify a SA Agent device as a target, make sure you configured it as a Cisco SAA
Responder target on the Target Configuration window. If you mistakenly configured it as an IP
target, and you specify a Target Port that is not well known (that is, if you specify a port number
greater than 1024), IPM considers the target an IP device rather than an SA Agent device and does
not enable the SA Agent Control protocol. As a result, the collector cannot connect to the target and
no data is collected.