Router Getting Started Guide

FINAL DRAFT —Cisco Confidential
6-2
Cisco ASR 9000 Series Aggregation Services Router Getting Started Guide
OL-17502-01
Chapter 6 Troubleshooting the Cisco IOS XR Software
Basic Troubleshooting Commands
• Using debug Commands, page 6-3
Using show Commands to Display System Status and Configuration
Use show commands to check the status of various Cisco IOS XR software subsystems and services.
Table 5-2 lists some of the common show commands.
Using the ping Command
Use the ping command to diagnose network connectivity. In EXEC mode, enter a hostname or an IP
address as an argument to this command. In administration EXEC mode, you can use the fabric or the
control Ethernet network to ping other nodes.
The ping command sends an echo request packet to a destination, then awaits a reply. Ping output can
help you evaluate path-to-destination reliability, delays over the path, and whether the destination can
be reached or is functioning.
Each exclamation point (!) indicates receipt of a reply. A period (.) indicates the network server timed
out while waiting for a reply. Other characters may appear in the ping output display, depending on the
protocol type.
Examples
In the following example, a successful ping attempt is shown:
RP/0/RSP0/CPU0:router# ping 10.233.233.233
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.233.233.233, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/7 ms
In the next example, an unsuccessful ping attempt is shown:
RP/0/RSP0/CPU0:router# ping 10.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
The following example shows the output of ping through the fabric:
RP/0/RSP1/CPU0:router(admin)# ping fabric location 0/6/5
Src node: 529 : 0/RSP1/CPU0
Dest node: 109 : 0/6/5
Local node: 529 : 0/RSP1/CPU0
Packet cnt: 1 Packet size: 128 Payload ptn type: default (0)
Hold-off (ms): 300 Time-out(s): 2 Max retries: 5
Running Fabric node ping.
Please wait...
Src: 529:, Dest: 109, Sent: 1, Rec'd: 1, Mismatched: 0
Min/Avg/Max RTT: 20000/20000/20000
Fabric node ping succeeded for node: 109