Cisco Systems Cisco IOS XR manual Using debug Commands, Displaying a List of Debug Features

Chapter 7 Troubleshooting the Cisco IOS XR Software

Basic Troubleshooting Commands

Examples

In the following example, the route for an IP address is displayed:

RP/0/RP0/CPU0:router# traceroute 10.233.233.233

Type escape sequence to abort.

Tracing the route to 10.233.233.233

1	172.25.0.2 11 msec 2 msec	1 msec
2	192.255.254.254 1 msec *	2 msec

Using debug Commands

Debug commands are used to diagnose and resolve network problems. Use debug commands to troubleshoot specific problems or during troubleshooting sessions.

Use debug commands to turn on or off debugging for a specific service or subsystem. When debugging is turned on for a service, a debug message is generated each time the debugging code section is entered. The following sections provide information on debugging:

•Displaying a List of Debug Features, page 7-5

•Enabling Debugging for a Feature, page 7-6

•Disabling Debugging for a Service, page 7-7

•Displaying Debugging Status, page 7-6

Caution Debug commands can generate a very large amount of output and can render the system unusable. Use debug to troubleshoot specific problems or during specific troubleshooting sessions on systems that are not in production.

Displaying a List of Debug Features

To display a list of the available debug features, enter the debug mode and enter a ? for on-screen help. The set of debug mode features is different in EXEC and administration EXEC modes. In the following example, EXEC mode is the entry point to debug mode:

RP/0/RP0/CPU0:router#	debug
RP/0/RP0/CPU0:router(debug)# ?
aaa	AAA Authentication, Authorization and Accounting
adjacency	Adjacency debug
adjacency	platform AIB information
aib	AIB information
alarm-logger	Turn on alarm debugging
arm	IP Address Repository Manager
arp	IP ARP transactions
asic-errors	Debug ASIC erors
asic-scan	Debug Asic Scan
--More--

In the next example, administration EXEC mode is the entry point to debug mode:

RP/0/RP1/CPU0:router# admin

RP/0/RP1/CPU0:router(admin)# debug

RP/0/RP1/CPU0:router(admin-debug)# ?

Cisco IOS XR Getting Started Guide

OL-10957-02 7-5