Cisco Systems Cisco IOS XR User Manual

  cctl         Chassis control driver process debug

  cetftp       Control ethernet TFTP (CE-TFTP) server process debug

  cpuctrl      Debug Cpuctrl Driver

  describe     Describe a command without taking real actions

  diagnostic   Diagnostic debugging

  dsc          dsc debug: all, fsm, table, cfg, and api

  dumper       Admin Debug Dumper

  exit         Exit from this submode

  fabric       Fabric debugging

  fabricq      Debug Fabric Queue Manager

  fia          Debug the Fabric Interface ASIC (FIA) driver

  gsp          Admin Debug gsp

  ingressq     Debug Ingress Queue Manager

  install      Install debug information

  inv          Inventory manager process debug

  invd         Inventory debug: all, trap, dll mem

  invmgr       Inventory Manager client API interface debug

  ntp          NTP information

  oird         oird all, event, message

  pair         DRP Pairing debug: Display debugging messages of drp_pairing

  shelfmgr     Shelfmgr debug: all, heartbeat, boot, fsm, init and eah

  sysdb        Configure SysDB debug settings

  upgrade-fpd  Debug upgrade fpd

 --More-- 

To enable debugging for a feature, enter the debug command in EXEC or administration EXEC mode 
and then enable the feature for debugging. For example:

RP/0/RP0/CPU0:router# debug

RP/0/RP0/CPU0:router(debug)# aaa all

RP/0/RP0/CPU0:router(debug)# exit

You can also enter the complete command from EXEC mode, as shown in the following example:

RP/0/RP0/CPU0:router# debug aaa all

Enter 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 RP1:

RP/0/RP0/CPU0:router# show debug

####  debug flags set from tty 'con0_RP1_CPU0'  ####

aaa all flag is ON

ipv4 io icmp flag is ON

RP/0/RP0/CPU0:router# no debug aaa all

RP/0/RP0/CPU0:router# show debug

####  debug flags set from tty 'con0_RP1_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 RP0 or RP1.