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ITM Overview Integrated Traffic Monitoring

ITM Overview

ITM is a method of tracking traffic flow patterns across interfaces on a network. ITM can monitor traffic

flows over both ingress (incoming) and egress (outgoing) interfaces. The traffic flow data is collected and

sent via Netflow 9 (RFC 768) over User Datagram Protocol (UDP) to either an external data collector or

through the internal Top Traffic data collector, analyzing the traffic flow patterns and presenting the

information in an intuitive graphic form.

ITM facilitates network configurations based on previous traffic flow patterns. By monitoring traffic

flows, decisions can be made regarding traffic engineering, traffic profiling, security measures, and quality

of service (QoS) issues. By providing a standardized method of recording, analyzing, and viewing

network traffic flow data, ITM helps network administrators make smart decisions regarding optimal

network configurations.

Traffic Engineering

Traffic engineering involves manipulating routed traffic based on captured traffic flow patterns.

Engineered routes travel through paths that would not have been used if standard routing procedures were

employed, resulting in a routing network that is malleable. By presenting captured traffic flow data, ITM

allows for traffic engineering on a per network basis. The captured traffic flow data aids in the

understanding of beginning-to-end traffic trends, and can be used to route traffic for load distribution

across multiple paths or to re-route traffic to a preferred path.

Traffic Profiling

Traffic can be profiled using ITM’s captured traffic flow data. By recording and analyzing where traffic is

entering and leaving the network, it becomes possible to understand the network traffic trends. Traffic

flow data can be recorded and sorted by interface, ingress/egress, time, protocol, or source/destination.

The traffic flow records present an overall view of the network, revealing where heavy traffic is flowing,

and where network resources should be allocated, both presently and for future network growth.

Security

ITM provides an extra level of network security through captured traffic flow data. Monitoring traffic on

the network reveals anomalies or changes in network behavior that need to be corrected.

Quality of Service

By keeping a record of the heaviest traffic flows, ITM shows bandwidth usage and indicates what type of

traffic is most frequent for certain IP addresses or interfaces, allowing for clear decisions to be made

regarding QoS allocations.

ITM Process

ITM functions by capturing traffic flow data and sending it to an external data collector and/or analyzer or

through the internal Top Traffic data collector. First, ITM captures traffic flow information, which is then

sent to a flow cache. The flow cache stores the information until it expires, at which time it is exported to

the specified data collector/analyzer.

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ADTRAN FNID Información técnica Pagina 2