50-2
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 50 Using Switch TopN Reports
Understanding How the Switch TopN Reports Utility Works
The Switch TopN Reports utility collects the following data for each physical port:
• Port utilization (util)
• Number of in/out bytes (bytes)
• Number of in/out packets (pkts)
• Number of in/out broadcast packets (bcst)
• Number of in/out multicast packets (mcst)
• Number of in errors (in-errors)
• Number of buffer-overflow errors (buf-ovflw)
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 data for each port is sorted using a user-specified metric that is chosen from the
values that are shown in Table 50-1.
Running Switch TopN Reports without the Background Keyword
If you enter the show top command without specifying the background keyword, processing begins but
the system prompt does not reappear on the screen and you cannot enter the other commands while the
report is being generated.
You can terminate the Switch TopN process before it finishes by pressing Ctrl-C from the same console
or Telnet session, or by opening a separate console or Telnet session and entering the clear top
[report_num] command. After the Switch TopN Reports utility finishes processing the data, it displays
the output on the screen immediately. The output is not saved.
Running Switch TopN Reports with the Background Keyword
If you enter the show top command and specify the background keyword, processing begins and the
system prompt reappears immediately. When processing completes, the reports do not display
immediately on the screen but are saved for later viewing.
The system notifies you when the reports are complete by sending a syslog message to the screen. Enter
the show top report [report_num] command to view the completed reports. The system displays only
those reports that are completed. For reports that are not completed, the system displays a short
description of the Switch TopN process information.
Table 50-1 Valid Switch TopN Reports Metric Values
Metric Value Definition
util Utilization
bytes Input/output bytes
pkts Input/output packets
bcst Input/output broadcast packets
mcst Input/output multicast packets
errors Input errors
overflow Buffer overflows
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