D-Link DWS-4026 [152/741] Sflow poller configuration

ConfiguringsFlow

D-Link UnifiedWiredandWirelessAccessSystem

November2011 Page152

D‐LinkUWSUserManual

sFlowPoller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Sa

mple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Ag

ent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.

Figure77:sFlowPollerConfiguration

•ClickRefreshtorefreshthepagewiththemos

tcurrentdatafromtheswitch.

Table67:sFlowPollerConfiguration

Field Description

Poller

DataSource

ThesFlowSamplerDatasourceforthisflowsampler.ThisAgentwillsupportPhysicalports

only.

ReceiverIndex ThesFlowReceiverforthissFlowCounterPoller.Ifsettozero,thepollerconfigurationisset

tothedefaultandthepollerisdeleted.Onlyactivereceiverscanbeset.Ifareceiverex

pires,

thenallpollersassociatedwiththereceiverwillalsoexpire.Theallowedrangeis1to8.

PollerInterval Themaximumnumberofsecondsbetweensuccessivesamplesofthecountersassociated

withthisdatasource