Specifications

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Catalyst 2970 Switch Software Configuration Guide

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Chapter 29 Troubleshooting

Using Ping

This section consists of this information:

• Understanding Ping, page 29-13

• Executing Ping, page 29-13

Understanding Ping

The switch supports IP ping, which you can use to test connectivity to remote hosts. Ping sends an echo

request packet to an address and waits for a reply. Ping returns one of these responses:

• Normal response—The normal response (hostname is alive) occurs in 1 to 10 seconds, depending

on network traffic.

• Destination does not respond—If the host does not respond, a no-answer message is returned.

• Unknown host—If the host does not exist, an unknown host message is returned.

• 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

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 29-1 describes the possible ping character output.

Command Purpose

ping ip host | address Ping a remote host through IP or by supplying the host name or

network address.