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Catalyst 2960 and 2960-S Switches Software Configuration Guide, Release 15.0(1)SE
OL-26520-01
Chapter 39 Troubleshooting
Troubleshooting Tables
For complete information about CPU utilization and how to troubleshoot utilization problems, see the
Troubleshooting High CPU Utilization document on Cisco.com.
Troubleshooting Power over Ethernet (PoE)
Table 39-6 lists some PoE troubleshooting scenarios. For more information causes and solutions
referenced in the table, see the Troubleshooting Power over Ethernet (PoE) troubleshooting guide on
Cisco.com.
Note Power over Ethernet Plus (PoE+) is not supported on Catalyst 2960-S switches.
Table 39-5 Troubleshooting CPU Utilization Problems
Type of Problem Cause Corrective Action
Interrupt percentage value is almost
as high as total CPU utilization value.
The CPU is receiving too many packets
from the network.
Determine the source of the network
packet. Stop the flow, or change the
switch configuration. See the section on
“Analyzing Network Traffic.”
Total CPU utilization is greater than
50% with minimal time spent on
interrupts.
One or more Cisco IOS process is
consuming too much CPU time. This is
usually triggered by an event that activated
the process.
Identify the unusual event, and
troubleshoot the root cause. See the
section on “Debugging Active
Processes.”
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