How can I verify my Netflow and Top talkers features have been enabled successfully?
One of the main reasons for the Net flow test, Top Sources test, and Top Destinations test to not report metrics is that the Top talkers may not be configured properly or currently top talkers may not be available. You can verify if your Netflow and Top talkers have been enabled successfully using the following command from the command prompt of the router:
show ip flow top-talkers
If the output is available as mentioned in Figure 1, then the Net Flows, Top Sources and Top Destinations tests will report the required metrics.
Figure 1 : The outputs when top talkers and Netflow is enabled perfectly
If the output as mentioned in Figure 2 appears, then you can clearly figure out that the Top talkers have not been configured properly. The tests will report metrics only when both the Netflow and Top talkers are configured and enabled properly.
Figure 2 : The output showing that the top talkers are not configured properly
If the following output (see Figure 3) appears, then you can figure out that though the Netflow and Top Talkers are configured and enabled, there are currently no Top talkers available. Therefore metrics will not be reported for the tests.
How do I verify if my NBAR protocol has been discovered successfully?
Execute the following command from the command prompt of the Cisco Router:
show ip nbar protocol-discovery
If the output as shown in Figure 4 appears, then you can confirm that the NBAR protocol has been discovered successfully.
Figure 4 : The output that appears upon successful NBAR protocol discovery
I don’t have access to the Cisco Router that I wish to monitor. The Network engineer who manages the Cisco Router is informing me that the Netflow and Top Talkers features are enabled and configured. How can I cross verify if the features have indeed been enabled successfully?
Execute the snmpwalk command for the following OID from the command prompt of the eG agent install directory:
Note that the syntax for the snmpwalk command will vary based on the SNMPVERSION with which the router is configured.
If the Netflow and Top Talkers features are enabled and configured properly, then the output as shown in Figure 5 will appear. Remember that the output as shown in Figure 5 will appear only if Top Talkers are available.
Figure 5 : The output that appears when Netflow and Top Talkers are enabled
If the Top Talkers are not configured properly or if there are currently no top talkers available, then the output will appear as shown in Figure 6.
Figure 6 : The output that appears when top talkers are not available/not configured