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Catalyst 3550 Multilayer Switch Software Configuration Guide
78-11194-09
Chapter37 Troubleshooting
Diagnosing Connectivity Problems
Beginning in privileged EXEC mode, use this command to ping another device on the network from the
switch:
Note Though other protocol keywords are available with the ping command, they are not supported in this
release.
This example shows how to ping an IP host:
Switch# ping 172.20.52.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echoes to 172.20.52.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
Switch#
Table 37-1 describes the possible ping character output.
To terminate a ping session, enter the escape sequence (Ctrl-^ X by default). You enter the default by
simultaneously pressing and releasing the Ctrl, Shift, and 6 keys, and then pressing the X key.
Using IP Traceroute
This section consists of this information:
• Understanding IP Traceroute, page 37-13
• Executing IP Traceroute, page 37-13
Command Purpose
ping [ip] {host | address} Ping a remote host through IP or by supplying the host name or
network address.
Table 37-1 Ping Output Display 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.
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