Cisco Cisco IOS Software Releases 12.2 B Mode D'Emploi

This appendixprovides information on how to use debug commands to troubleshoot Cisco Packet Data 
Serving Node (PDSN) networks for Release 1.2. 

This document includes the following sections:

You should know how to configure a Cisco router and should be familiar with the protocols and media 
routers are configured to support. You must have some knowledge of interpreting IOS debug outputs and 
must also be aware of network topology.

PDSN debugging allows you to debug in two different ways. One, all events that are associated with a 
debug command will be displayed in a debug message (unconditional). Second, you can set a conditional 
debug trigger so that only events based on certain conditions will cause a debug message to be displayed. 
PDSN allows two types of conditional debug triggers:

Username condition

Calling Party Number (MNID) condition 

Enabling debugs can disrupt the operation of the router when internetworks are experiencing high load 
conditions. Before you use a debug command, always consider the size of the output that may be 
generated by this command, and the time that it may take to generate. Additional debug information and 
command references can be found on the Cisco CCO web page.