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Example ITM Configuration Integrated Traffic Monitoring

In order to get a more accurate cross section of network traffic flow patterns, the time-out rates for

template export and active flow cache will be changed from their defaults. By changing the time-out rates

from the default 30 minutes to 15, a more detailed picture can be achieved in analysis. To change these

values from the defaults, enter these CLI commands:

(config)#ip flow cache timeout active 15

(config)#ip flow export template timeout-rate 15

Sampling, randomized at a rate of 1-out-of 100, is employed from the Global configuration prompt to help

minimize the CPU and memory usage of the AOS product, while still creating an accurate picture of traffic

flow information.

(config)#ip flow cache sample one-out-of 100 random

The following GUI entries also set these values:

To verify that the ITM is configured properly, use the ITM show ip flow commands (detailed on page 45

of this guide) or the GUI IP Flow Statistics menu (detailed on page 23).

In this example, Top Traffic functionality is also employed in addition to the external data collector. Top

Traffic is configured to accumulate data for 10-minute intervals, to monitor packet counts, and to show the

10 Top Talkers. Top Traffic is also set to filter traffic through the same ACL as ITM (engineering), and is

not set to monitor any custom ports. The following CLI commands set these values:

(config)#ip flow top talkers

(config-top-talkers)#interval 10

(config-top-talkers)#sort-by packets

(config-top-talkers)#top 10

(config-top-talkers)#match list engineering

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ADTRAN FNID Technical Information Seite 38