Cisco Systems 2950, 2955 Executing Ping

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Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
OL-10101-02
Chapter 31 Troubleshooting
Diagnosing Connectivity Problems
• Destination unreachable—If the default gateway cannot reach the specified network, a
destination-unreachable message is returned.
• Network or host unreachable—If there is no entry in the route table for the host or network, a
network or host unreachable message is returned.
Executing Ping
If you attempt to ping a host in a different IP subnetwork, you must define a static route to the network.
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 31-1 describes the possible ping character output.
To end 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.
Command Purpose
ping [ip] {host | address}Ping a remote host through IP or by supplying the host name or
network address.
Tab l e 31-1 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.
UA destination unreachable error PDU was received.
CA congestion experienced packet was received.
IUser interrupted test.
?Unknown packet type.
&Packet lifetime exceeded.