ADTRAN FNID Technické informace stáhnout pdf (Strana 3)

Integrated Traffic Monitoring ITM Process

The following illustration shows how ITM fits into the network.

Figure 1. ITM Network Diagram

As traffic enters or exits the AOS product, ITM captures a snapshot of the traffic flow and exports the

information to the external data collector, or collects the information through Top Traffic. The external

data collector stores the gathered information, uses software to analyze it, and displays it on a user

terminal. The analyzed information can be used to determine traffic flow patterns on the network, and

make decisions accordingly. Top Traffic collects the information and produces listings of the hosts sending

the most data (Top Talkers) and the hosts receiving the most data (Top Listeners). A more detailed

overview of Top Traffic is located on

page 7 of this guide.

Traffic Flow Data Criteria

ITM begins by capturing traffic flow information. As each IP packet arrives at an AOS product, it is

inspected for specific criteria. These criteria include the following:

• Traffic flow type: whether the IP packet is incoming (ingress) or outgoing (egress)

• Interface crossed: which interface the IP packet flows through on the AOS product

• Source IP address: where the IP packet originated

• Destination IP address: where the IP packet is destined

• Type of service (ToS) octet: the 8-bit number that determines the traffic classification of the IP

packet and its per-hop behavior

• Protocol type: which Layer 3 protocol is used to transport the IP packet

• Source port: which port is used for IP packet ingress

• Destination port: which port is used for IP packet egress

The IP packets are grouped based on these criteria. Groups of IP packets with similar attributes are called

traffic flows.

LAN

Internet

AOS Product

External

Data Collector

User

Terminal

IP Packet Flow

ITM Traffic Flow

Observation/

Data Collection

Export collected

data

IP Packet Flow

Display collected

data

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ADTRAN FNID Technické informace Strana 3