Net Optics Smart Filtering Appliance User Manual download pdf (Page 11)

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Director

In this installation, Director has ten additional Span ports and one in-line link that are available for expansion, when

more links need to be monitored.

Monitoring Tools

Still referring to Figure 2, six monitoring tools are connected to Director. They include protocol and performance analyzers,

RMON probes, and an intrusion detection system (IDS). Any of the monitoring tools can be used to observe any of the

connected network links, and the connections can be switched easily, using the Director CLI, without ever moving a

cable or touching the tools. A set of possible data ows is indicated by the colored circles on the links in the diagram.

One of the network monitoring tools is capable of handling more than 1 Gbps, so it is attached to a 10 Gigabit XFP

port. Through this port, the tool can be sent aggregated trafc up to 10 Gbps. For example, the colored circles in the

diagram indicate that trafc from four links is being aggregated and sent to this port.

Four streams of trafc are also being aggregated to the red monitoring tool on the upper left. Since this is a 1 Gbps Monitor

port, aggregated data up to 1 Gbps can be sent to the red tool. If the aggregated trafc exceeds 1 Gbps, packets will be

dropped. To avoid dropping packets, lters should be congured to reduce the aggregated trafc load to 1 Gbps or less.

The two green RMON monitoring tools at the bottom are the same type of tool. Two identical tools provide the capabil-

ity of monitoring a greater amount of data than a single tool can handle. Another reason to use identical monitoring

tools is to provide redundancy in case one of the tools fails. In addition, Director can be congured to send different

types of trafc to each tool, for example, all the TCP trafc to one tool, and the UDP trafc to the other.

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Net Optics Smart Filtering Appliance User Manual Page 11