Cisco Catalyst 3750-E Series, Руководство по настройке программного обеспечения

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Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-08
Chapter 49 Troubleshooting
Monitoring Temperature
Monitoring Temperature
The switch monitors the temperature conditions and uses the temperature information to control the fans.
Use the show env temperature status privileged EXEC command to display the temperature value,
state, and thresholds. The temperature value is the temperature in the switch (not the external
temperature).You can configure only the yellow threshold level (in Celsius) by using the
system env
temperature threshold yellow value global configuration command to set the difference between the
yellow and red thresholds. You cannot configure the green or red thresholds. For more information, see
the command reference for this release.
Using Ping
•
Understanding Ping, page 49-15
• Executing Ping, page 49-15
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
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
Chapter 40,
“Configuring IP Unicast Routing.”
IP routing is disabled by default on all switches. If you need to enable or configure IP routing, see
Chapter 40, “Configuring IP Unicast Routing.”
Beginning in privileged EXEC mode, use this command to ping another device on the network from the
switch:
Command Purpose
ping ip host | address Ping a remote host through IP or by supplying the hostname or
network address.