Chapter 22 Using Switch Topn Reports; Understanding How Switch Topn Reports Works - Cisco WS-C2948G-GE-TX Configuration Manual

Using Switch TopN Reports
This chapter describes how to use the Switch TopN Reports utility on the Catalyst enterprise LAN
switches.
Note For complete syntax and usage information for the commands that are used in this chapter, refer to the
Catalyst 4500 Series, Catalyst 2948G, Catalyst 2948G-GE-TX, and Catalyst 2980G Switches Command
Reference.
This chapter consists of these sections:
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Understanding How Switch TopN Reports Works

The Switch TopN Reports utility allows you to collect and analyze data for each physical port on a
switch.
The Switch TopN Reports utility collects the following data for each physical port:
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When the Switch TopN Reports utility starts, it gathers data from the appropriate hardware counters and
then goes into sleep mode for a user-specified period. When the sleep time ends, the utility gathers the
current data from the same hardware counters, compares the current data from the earlier data, and stores
the difference. The switch sorts data for each port using a user-specified metric that is selected from the
types that are listed in
Catalyst 4500 Series, Catalyst 2948G, Catalyst 2948G-GE-TX, and Catalyst 2980G Switches Software Configuration Guide—Release 8.2GLX
78-15908-01
Understanding How Switch TopN Reports Works, page 22-1
Running and Viewing Switch TopN Reports, page 22-3
Port utilization (util)
Number of in and out bytes (bytes)
Number of in and out packets (pkts)
Number of in and out broadcast packets (bcst)
Number of in and out multicast packets (mcst)
Number of in errors (in-errors)
Number of buffer-overflow errors (buf-ovflw)
Table 22-1.
C H A P T E R
22
22-1