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FUJITSU PSWITCH
User’s Guide
110
December/2018
The sFlow monitoring system consists of sFlow Agents (such as switch) and a
central sFlow receiver. sFlow Agents use sampling technology to capture traffic
statistics from monitored devices. sFlow datagrams forward sampled traffic
statistics to the sFlow Collector for analysis.
You can specify up to eight different sFlow receivers to which the switch sends
sFlow datagrams.
Figure 3-13: sFlow Architecture
The advantages of using sFlow are:
It is possible to monitor all ports of the switch continuously, with no impact on
the distributed switching performance.
Minimal memory is required. Samples are not aggregated into a flow-table on
the switch; they are forwarded immediately over the network to the sFlow
receiver.
The sFlow system is tolerant to packet loss in the network because statistical
modeling means the loss is equivalent to a slight change in the sampling rate.
sFlow receiver can receive data from multiple switches, providing a real-time
synchronized view of the whole network.
3.1.6.2.1.
sFlow Sampling
The sFlow Agent in this software uses two forms of sampling:
Statistical packet-based sampling of switched or routed Packet Flows
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Time-based sampling of counters
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Packet Flow Sampling and Counter Sampling are performed by sFlow Instances
associated with individual Data Sources within a sFlow Agent. Both types of
samples are combined in sFlow datagrams. Packet Flow Sampling creates a steady,