Using Ping; Understanding Ping; Executing Ping - Cisco WS-C3560-48PS-S Software Configuration Manual

Chapter 35 Troubleshooting
If you are using a non-Cisco approved SFP module, remove the SFP module from the switch, and replace
it with a Cisco-approved module. After inserting a Cisco-approved SFP module, use the errdisable
recovery cause gbic-invalid global configuration command to verify the port status, and enter a time
interval for recovering from the error-disabled state. After the elapsed interval, the switch brings the
interface out of the error-disabled state and retries the operation. For more information about the
errdisable recovery command, refer to the command reference for this release.
If the module is identified as a Cisco SFP module, but the system is unable to read vendor-data
information to verify its accuracy, an SFP module error message is generated. In this case, you should
remove and re-insert the SFP module. If it continues to fail, the SFP module might be defective.

Using Ping

This section consists of this information:
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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:
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Executing Ping

If you attempt to ping a host in a different IP subnetwork, you must define a static route to the network
or have IP routing configured to route between those subnets. For more information, see
"Configuring IP Unicast Routing."
IP routing is disabled by default on all switches. If you need to enable or configure IP routing, see
Chapter 30, "Configuring IP Unicast Routing."
Beginning in privileged EXEC mode, use this command to ping another device on the network from the
switch:
Command
ping ip host | address
78-16156-01
Understanding Ping, page 35-13
Executing Ping, page 35-13
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.
Purpose
Ping a remote host through IP or by supplying the host name or
network address.
Catalyst 3560 Switch Software Configuration Guide
Using Ping
Chapter 30,
35-13