Specifications

Scenarios 3-9

NAM / Traffic Analyzer v3.5 Tutorial

Scenarios 3-9

NAM / Traffic Analyzer v3.5 Tutorial

Scenario 1

Switch Port Utilization

Scenario 1

Switch Port Utilization

Check port status for any indication of problems.

Monitor > Switch > Port Stats

Switch Port Utilization

Dean can now look at the utilization of each of the Cisco Catalyst

Switch ports that host the NAM card.

Step 1. Click Monitor > Switch > Port Stats. The Port Stats data screen is displayed.

Most of the monitor views offer three perspectives—Current Rates, TopN Chart, and Cumulative Data. These

can be chosen by clicking the radio buttons at the top of the data table. By default, the Current Rates table is

displayed first. This table provides statistics for traffic collected during the last refresh cycle only. The TopN

chart provides a list of ports ranked by volume for data during the last refresh cycle only, and the Cumulative

Data table provides absolute values for data collected since the min-RMON counters were last cleared.

The refresh cycle can be modified by selecting Setup > Preferences, changing the Refresh Interval, and

clicking Apply. If the Auto Refresh check box is selected on any data screen, the tables and charts will be

refreshed as new data is collected.

Using these views, Dean happily notes that all ports on his switch are barely utilized. This confirms the

bandwidth predictions Q-Bits used to design its network. If any abnormally high utilization or error conditions

had existed, Dean could use them to help determine where to begin looking for the causes. To drill down,

Dean can SPAN any port or combination of ports to the NAM for complete traffic analysis of the data

traversing that port.

Because nothing looks out of the ordinary here, Dean decides to SPAN port Gi1/2, which connects to the

server farm workgroup access switch, to look at traffic flowing to/from the server farm.