Sflow Poller Configuration; Counter Sampling - D-Link DWS-4026 User Manual

D-Link Unified Access System
Field Description
sFlow Receiver The time (in seconds) remaining before the sampler is released and stops sampling. A management
Timeout entity wanting to maintain control of the sampler is responsible for setting a new value before the old
one expires. The allowed range is 0 to 4294967295 seconds. A value of zero sets the selected receiver
configuration to its default values.
sFlow Receiver
The maximum number of data bytes that can be sent in a single sample datagram. The manager
Maximum should set this value to avoid fragmentation of the sFlow datagrams. The default value is 1400. The
Datagram Size allowed range is 200 to 9116.)
sFlow Receiver The IP address of the sFlow collector. If set to 0.0.0.0 no sFlow datagrams will be sent.
Address
sFlow Receiver The destination port for sFlow datagrams. The allowed range is 1 to 65535).
Port
Receiver The version of sFlow datagrams that should be sent.
Datagram
Version
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F P C
S LOW OLLER ONFIGURATION
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 Poller Configuration page, click LAN > Administration > sFlow > Poller Configuration in the
navigation tree.
Page 122 Configuring sFlow
Software User Manual
Document 34CSFP6XXUWS-SWUM100-D7
12/10/09