Netgear GS728TP User Manual download pdf (Page 479)

100

101

Monitoring the System

479

ProSafe M5300 Switch

sFlow

is a standard for monitoring high-speed switched and routed networks. sFlow

technology is built into network equipment and gives complete visibility into network activity,

enabling effective management and control of network resources.

The sFlow monitoring system consists of an sFlow Agent (embedded in a switch or router or

in a standalone probe) and a central sFlow Collector. The sFlow Agent uses sampling

technology to capture traffic statistics from the device it is monitoring. sFlow datagrams are

used to immediately forward the sampled traffic statistics to an sFlow Collector for analysis.

The sFlow Agent uses two forms of sampling: statistical packet-based sampling of switched

or routed Packet Flows, and time-based sampling of counters.

From the sFlow link under the Monitoring tab, you can access the following pages:

• Basic on page 479

• Advanced on page 480

Basic

From the Basic link, you can access the following pages:

• sFlow Agent on page 479

sFlow Agent

Packet Flow Sampling and Counter Sampling are performed by sFlow Instances associated

with individual Data Sources within the sFlow Agent. Packet Flow Sampling and Counter

Sampling are designed as part of an integrated system. Both types of samples are combined

in sFlow datagrams. Packet Flow Sampling will cause a steady, but random, stream of sFlow

datagrams to be sent to the sFlow Collector. Counter samples may be taken opportunistically

in order to fill these datagrams.

In order to perform Packet Flow Sampling, an sFlow Sampler Instance is configured with a

Sampling Rate. The Packet Flow sampling process results in the generation of Packet Flow

Records. In order to perform Counter Sampling, the sFlow Poller Instance is configured with

a Polling Interval, The Counter Sampling process results in the generation of Counter

Records. The sFlow Agent collects Counter Records and Packet Flow Records and sends

them in the form of sFlow datagrams to sFlow Collectors.

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