System information

Using This Publication
xviii
Book Title
• The chapters in Part 6, “Troubleshooting Other Internetwork Problems,” provide information on
troubleshooting CiscoWorks installations, and on troubleshooting security implementations,
including TACACS troubleshooting and password recovery.
• Appendixes provide supplemental troubleshooting information, including information on
creating core dumps, memory maps for different Cisco routers, technical support information,
and a list of references and recommended reading. In addition, at the end of the book are several
perforated troubleshooting worksheets to assist you in gathering information when problems
occur.
Using This Publication
This publication is designed to provide users with the information needed to troubleshoot common
problems encountered in Cisco-based internetworks. Most chapters focus on describing symptoms,
identifying their causes, and suggesting specific actions to resolve the problem. Some material
describes preventative measures or tips for identifying problems by interpreting command output.
Document Conventions
Our software and hardware documentation uses the following conventions:
• The symbol ^ represents the key labeled Control.
For example, ^D means hold down the Control key while you press the D key.
• A string is defined as a nonquoted set of characters. For example, when setting up a community
string for SNMP to “public,” do not use quotes around the string, or the string will include the
quotation marks.
Command descriptions use these conventions:
• Examples that contain system prompts denote interactive sessions, indicating that the user enters
commands at the prompt. The system prompt indicates the current command mode. For example,
the prompt router(config)# indicates global configuration mode.
• Commands and keywords are in boldface font.
• Arguments for which you supply values are in italic font.
• Elements in square brackets ([ ]) are optional.
• Alternative but required keywords are grouped in braces ({ }) and separated by vertical bars (|).
Examples use these conventions:
• Terminal sessions and information the system displays are in screen font.
• Information you enter is in boldface screen font.
• Nonprinting characters, such as passwords, are in angle brackets (< >).
• Default responses to system prompts are in square brackets ([ ]).
• Exclamation points (!) at the beginning of a line indicate a comment line.
• When part of the command output has been omitted (to conserve space), the deleted output is
indicated with italicized brackets and ellipsis ([...])
Note This is a special paragraph that means reader take note. It usually refers to helpful
suggestions, the writer’s assumptions, or reference to materials not contained in this manual.