System information
 1
Introduction
About this Guide
Purpose
The Observer Reference Manual comprehensively describes every menu option, 
mode, tool and setup dialog in the Observer protocol analyzer. It is intended as a 
companion to Installing and Using Network Instruments Observer, which is more 
task-oriented, providing tutorials and examples. The content of both manuals is 
available in Observer’s online help system.
Intended Audience
This guide is for experienced computer users who are familiar with Microsoft 
Windows, TCP/IP networking, and protocol analysis concepts. 
Document Conventions
When this document displays a menu path such as File->Save..., it means that you 
should choose 
Save... from the File menu. 
Variables are shown in italic type. For example, when the manual states that “The 
format of address entries in a .ali file is MACaddress alias,” it means that you must 
supply the actual MAC address and alias pairs in that particular order.
Things to Note
• Observer is shipped with default global options such as: general configuration 
options, email options, pager options, and SNMP options (if you have purchased 
the SNMP Suite). To change any of these options, go to Options > Observer 
General Options.
• Right-click menus are available throughout Observer. To quickly locate and 
execute a command, just right-click and a menu will be displayed. 
• Some modes are available in both non-switched and switched modes. Any notes 
for operating the mode in a switched environment are documented along with the 
mode.










