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Integrated Traffic Monitoring ITM Process

Top Traffic Internal Data Collector

Using the internal Top Traffic data collection feature of ITM, several of the most important flow cache

statistics can be viewed at a glance from within the router itself. The Top Traffic feature incorporates the

statistics of Top Talkers (top bandwidth users by source IP address), Top Listeners (top bandwidth users by

destination IP address), and Port Lists (amounts of traffic observed on specific ports) into easily viewed

output, accessed through either the command line interface (CLI) or Web-based graphical user interface

(GUI). These statistics are captured by the metering process at the traffic flow observation point, and

collected as traffic flow entries expire from the flow cache. These statistics allow the user to see the nature

of traffic being processed by the router without having to configure a separate server to collect data. The

following diagram depicts where the Top Traffic feature fits into the ITM process:

Figure 3. Top Traffic Feature in ITM

The internal Top Traffic data collector can be enabled instead of or in conjunction with an external data

collector, or it can operate with no external data collector configured. Because Top Traffic collects and

processes expired flow cache entries in a separate function from their exportation, it can function

independently of an external collector. With both an external data collector and Top Traffic enabled,

expired flow cache entries are sent to both the external data collector and through the Top Traffic collector.

With only an external data collector configured, no data is sent through the Top Traffic collector. With only

Top Traffic enabled, no data is sent to an external collector. The separation of Top Traffic collection from

external data collectors allows the Top Traffic collector, an external data collector, or both to be enabled.

Network Interface/

Observation Point:

Collects traffic flow

information

Metering Process: Records

traffic flows and creates traffic

flow entries

Flow Cache: Stores traffic

flow entries until expiration

Export Process:

Exports expired traffic flow

entries to the external data

collector

Traffic flow data sent to

external data collector

IP Packet Traffic

AOS Product

Top Traffic Collector:

Captures a snapshot of

traffic flow statistics

At expiration, traffic flow entries are

sent either to the internal Top Traffic

data collector, an external data

collector, or both.

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