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Configuring System Information 251
Figure 6-124. sFlow Sampler Summary
Configuring and Viewing sFlow Settings Using CLI Commands
For information about the CLI commands that perform this function, see the following chapter in the
CLI Reference Guide
:
• sFlow Commands.
sFlow Poll Configuration
The sFlow agent collects time-based sampling of network interface statistics and sends them to the
configured sFlow receivers. A data source configured to collect counter samples is called a poller.
Counter Sampling
The primary objective of Counter Sampling is to efficiently, periodically export counters associated with
Data Sources. A maximum Sampling Interval is assigned to each sFlow instance associated with a Data
Source.
Counter Sampling is accomplished as follows:
The sFlow Agent keeps a list of counter sources being sampled. When a Packet Flow Sample is
generated, the sFlow Agent examines the list and adds counters to the sample datagram, least recently
sampled first. Counters are only added to the datagram if the sources are within a short period, i.e. five
seconds, of failing to meet the required Sampling Interval. Periodically, i.e. every second, the sFlow Agent
examines the list of counter sources and sends any counters that need to be sent to meet the sampling
interval requirement.
To access the sFlow Poll Configuration page, click System > sFlow > Poll Configuration in the
navigation tree.