HP LaserJet Enterprise 600 - Printer Wake-Up Causes and Protocols; Sleep Schedule; Maintenance Events; Network Protocols Impact

6

SleepSchedule
WhenaSleepScheduleisusedtoaligntheprintersleeptimewithoff‐businesshours,Wake/AutoOn
EventscanonlybesettoAllEvents.Likewise,ifWake/AutoOnEventsissettoeitherNetworkPortor
PowerButtonOnly,SleepSchedulecannotbeset.
Wheninuse,the
SleepSchedule willonlyputtheprinterinto Sleep.TheprinterwillnevergotoAuto‐
Offandthus,tominimizeenergyusage,Auto‐Off/Auto‐OnisrecommendedoverSleepSchedule.
MaintenanceEvents
MaintenanceEventscoversabroadareaofactivitiesthatsupportvariousfeaturesoftheprinter.A
numberoftheserequiretheprintertowakefromAutoOffandenterSleepmode.Formaximum
energysavingsthesefeaturescanbedisabledattheexpenseofsomelossoffunctionality.
HTTPandTelnet
HTTPandTelnetareusedtoaccesstheremotelymanagetheprinter.Thoughactivitiesonthese
protocolswillwaketheprinterfromAuto‐Off toSleep,sincetheseareusedmanually(andthus
infrequently)theyhavelittleimpactontheenergyconsumptionoftheprinter.
SNMP
SNMP,orSimpleNetworkManagementProtocolisaversatileandubiquitousprotocolusedfor
managingnetworkdevices.Itisusedtobyprinterdriverstodeterminetheprinterstatus before
sendingajob,duringtheinstallationofaprintertocatalogthefeaturesoftheprinter,byWebJetadmin
tomonitorthe
healthoftheprinter,byaccountingpackagessuchasRMAtodetermineusage,and
more.
ThoughSNMPisubiquitous,itisnotanabsolutenecessityforproperoperationoftheprinterandcan
bedisabledattheprinter.ThisactionshouldbecoordinatedwithPCs,workstations,serversand
networkmanagement
devicesonthenetworkthatwouldnormallyexpectSNMPtobeactive.
Twoapproachescanbetakenwith respecttoSNMP.SNMPcanbedisabledattheprinterandthe
printercanbeusedwithreducedfunctionalitybutlesspowercons umption.AlternativelySNMPcan
enabled,buttheenvironmentcanbetuned
tominimizethewakeupsandtheenergyconsumption.The
implicationsofthesechoicesarediscussedfurtherinfollowingsections.
SNMPcanbedisabledfromtheNetworktab,NetworkSettingspage,bycheckingtheDisable
SNMPv1/v2checkbox.SNMPv3isdisabledbydefault.
SLPConfiguration
TheServiceLocationProtocol(RFC2608)isadecentralizedserviceadvertisementmechanism.
Participantsintheprotocoladvertiseperiodicallyby transmittingmulticastframes(SRVLOCframes).