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System Administration Guide: Network Services
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Solving PPP Problems (Task Map)

Use the following task map to quickly access advice and solutions for common PPP problems.

Table 21-1 Task Map for Troubleshooting PPP

Task

Definition

For Instructions

Obtain diagnostic information about the PPP link

Use PPP diagnostic tools to obtain output for troubleshooting.

How to Obtain Diagnostic Information From pppd

Obtain debugging information for the PPP link

Use the pppd debug command to generate output for troubleshooting.

How to Turn on PPP Debugging

Troubleshoot general problems with the network layer

Identify and fix PPP problems that are network-related by using a series of checks.

How to Diagnose Network Problems

Troubleshoot general communications problems

Identify and fix communications problems that affect the PPP link.

How to Diagnose and Fix Communications Problems

Troubleshoot configuration problems

Identify and fix problems in the PPP configuration files.

How to Diagnose Problems With the PPP Configuration

Troubleshoot modem-related problems

Identify and fix modem problems.

How to Diagnose Modem Problems

Troubleshoot chat script-related problems

Identify and fix chat script problems on a dial-out machine.

How to Obtain Debugging Information for Chat Scripts

Troubleshoot serial-line speed problems

Identify and fix line–speed problems on a dial-in server.

How to Diagnose and Fix Serial-Line Speed Problems

Troubleshoot common problems for leased lines

Identify and fix performance problems on a leased line.

Fixing Leased-Line Problems

Troubleshoot problems related to authentication

Identify and fix problems related to the authentication databases.

Diagnosing and Fixing Authentication Problems

Troubleshoot problem areas for PPPoE

Use PPP diagnostic tools to obtain output for identifying and fixing PPPoE problems.

How to Obtain Diagnostic Information for PPPoE

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  Published under the terms fo the Public Documentation License Version 1.01. Design by Interspire