Cisco Systems A9K24X10GETR manual Using show Commands to Display System Status and Configuration

Chapter 6 Troubleshooting the Cisco IOS XR Software

Basic Troubleshooting Commands

F I N A L D R A F T — C i s c o C o n f i d e n t i a l

•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 5-2lists 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
	Cisco ASR 9000 Series Aggregation Services Router Getting Started Guide
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