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Understanding TCP/IP

You're reading from   Understanding TCP/IP A clear and comprehensive guide to TCP/IP protocols

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Product type Paperback
Published in May 2006
Publisher Packt
ISBN-13 9781904811718
Length
Edition 1st Edition
Concepts
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Author (1):
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CP Books a.s. CP Books a.s.
Author Profile Icon CP Books a.s.
CP Books a.s.
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Toc

Table of Contents (20) Chapters Close

Preface 1. Introduction to Network Protocols FREE CHAPTER 2. Network Monitoring Tools 3. Physical Layer 4. Link Layer 5. Internet Protocol 6. IP Address 7. Routing 8. IP Version 6 9. Transmission Control Protocol 10. User Datagram Protocol 11. Domain Name System 12. Telnet 13. File Transfer Protocol 14. Hypertext Transfer Protocol 15. Email 16. Forums 17. Lightweight Directory Access Protocol A. CISCO Routers Index

A.7 Debugging

The aim is to audit events as they occur. We will be interested in the following two types:

  1. Events that occurred during the running of the system. That includes, for example, an interface switched into the Up or Down mode, whether the router configuration has been changed, etc.
  2. Events defined by the administrator. The administrator defines a trap, such as writing a report when a protocol data packet has been sent.

First, we have to specify in the configuration where the individual event records will be written. This can be done by entering the logging command in the configuration file:

Router# configure terminal
Router(config)# logging console 7

This command will print out the output of event records onto the console. The number 7 specifies the most detailed statement. Lower numbers indicate less detailed statements, with 0 being the least detailed. If we also want to have traps recorded, then we add another command (which is important especially for recording events via a network...

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