1051
Troubleshooting
How to Troubleshoot
To end a ping session, enter the escape sequence (Ctrl-^ X by default). Simultaneously press and release the Ctrl, Shift,
and 6 keys and then press the X key.
Executing IP Traceroute
Beginning in privileged EXEC mode, enter the following command to trace that the path packets take through the
network:
Note: Other protocol keywords are available with the traceroute privileged EXEC command, but they are not supported
in this release.
This example shows how to perform a traceroute to an IP host:
Switch# traceroute ip 171.9.15.10
Type escape sequence to abort.
Tracing the route to 171.69.115.10
1 172.2.52.1 0 msec 0 msec 4 msec
2 172.2.1.203 12 msec 8 msec 0 msec
3 171.9.16.6 4 msec 0 msec 0 msec
4 171.9.4.5 0 msec 4 msec 0 msec
5 171.9.121.34 0 msec 4 msec 4 msec
6 171.9.15.9 120 msec 132 msec 128 msec
7 171.9.15.10 132 msec 128 msec 128 msec
Switch#
The display shows the hop count, the IP address of the router, and the round-trip time in milliseconds for each of the
three probes that are sent.
Table 73 on page 1052 lists the characters that can appear in the traceroute command output.
Table 72 Ping Text Characters
Character Description
! Each exclamation point means receipt of a reply.
. Each period means the network server timed out while waiting for a reply.
U A destination unreachable error PDU was received.
C A congestion experienced packet was received.
I User interrupted test.
? Unknown packet type.
& Packet lifetime exceeded.
Command Purpose
traceroute ip host Traces the path that packets take through the network.
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