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FINAL DRAFT —Cisco Confidential
6-5
Cisco ASR 9000 Series Aggregation Services Router Getting Started Guide
OL-17502-01
Chapter 6 Troubleshooting the Cisco IOS XR Software
Basic Troubleshooting Commands
Viewing Debugging Status
Type the show debug command to display the debugging features enabled for your terminal session. The
terminal session is labeled tty and represents your connection to the router through a specific port, which
might be the console port, auxiliary port, or Management Ethernet interface. In the following example,
the command display indicates that debugging is enabled for two features (AAA and ipv4 io icmp) from
a terminal session on the console port of RSP1:
RP/0/RSP0/CPU0:router# show debug
#### debug flags set from tty 'con0_RSP1_CPU0' ####
aaa all flag is ON
ipv4 io icmp flag is ON
RP/0/RSP0/CPU0:router# no debug aaa all
RP/0/RSP0/CPU0:router# show debug
#### debug flags set from tty 'con0_RSP1_CPU0' ####
ipv4 io icmp flag is ON
The preceding example is for a Cisco CRS-1 router. On a Cisco XR 12000 Series Router, the slot
number of the tty ID is 0 or 1 instead of RSP0 or RSP1.
Type the show debug conditions command to display the conditional debugging status. For example:
RP/0/RSP0/CPU0:router# show debug conditions
#### debug conditions set from tty 'con0_RSP1_CPU0' ####
interface condition is ON for interface 'gi0/2/0/1'
Disabling Debugging for a Service
Use the no form of the debug command or the undebug command to turn off debugging for a service or
subsystem.
In the following example, the no debug command disables debugging for the AAA feature:
RP/0/RSP0/CPU0:router# no debug aaa all
RP/0/RSP0/CPU0:router# show debug
#### debug flags set from tty 'con0_RSP1_CPU0' ####
ipv4 io icmp flag is ON
You can also turn off debugging from the undebug mode, as shown in the following example:
RP/0/RSP0/CPU0:router# undebug
RP/0/RSP0/CPU0:router(undebug)# aaa all
RP/0/RSP0/CPU0:router(undebug)# exit
Disabling Debugging for All Services Started at the Active Terminal Session
Use the undebug all or no debug all command to turn off all debugging started by the active terminal
session. For example, if you enter either of these commands while connected to the router through the
console port on the active RP, all debug sessions started from that console port are disabled. In the
following example, debugging for all services is disabled and then verified:
RP/0/RSP0/CPU0:router# undebug all
RP/0/RSP0/CPU0:router# show debug
No matching debug flags set