D-Link DWS-4026 [94/741] Sntp settings

ConfiguringSNTPSettings

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

November2011 Page94

D‐LinkUWSUserManual

MD5(MessageDigest5)Authenticationsaf eguardsdevicesynchronizationpathstoSNTPservers.MD5isan

algorithmthatproducesa128‐bithash.MD5isavariationofMD4,andincreasesMD4security.MD5verifies

theintegrityofthecommunication,authenticatestheoriginofthecommunication.

SNTPSettings

UsetheSNTPGlobalConfigurationpagetoviewandadjustSNTPparameters.

TodisplaytheSNTPGlobalConfigurationpage,clickLAN>Administration>SNTP> SNTPSettingsinthe

navigationmenu.

Figure31:SNTPGlobalConfiguration

Table24:SNTPGlobalConfigurationFields

Field Description

ClientMode Usedrop‐downlistspecifytheSNTPclientmode, whichisoneofthefollowing

modes:

• Disable:SNTPisnotoperational.NoSNTPrequestsaresentfromtheclient

norareanyreceivedSNTPmessagesprocessed.

• Unicast:SNTPoperatesinapointtopointfashion.Aunicastclientsendsa

equesttoadesignatedserveratitsunicastaddressandexpectsareply

fromwhichitcandeterminethetimeand,optionallytheround‐tripdelay

andlocalclockoffsetrelativetotheserver.

• Broadcast:SNTPoperatesinthesamemannerasmulticastmodebutuses

alocalbroadcas taddressins

teadofamulticastaddress.Thebroadcast

addresshasasinglesubnetscopewhileamulticastaddresshasInternet

widescope.

Port SpecifiesthelocalUDPporttolistenforresponses/broadcasts.Allowedrange

is(1to65535).Defaultvalueis123.

UnicastPollInterval Specifiesthenumberofsecondsbetweenunicastpollr

equestsexpressedasa

poweroftwowhenconfiguredinunicastmode.Allowedrangeis(6to10).

Defaultvalueis6.

BroadcastPollInterval Specifiesthenumberofsecondsbetweenbroadcastpollrequestsexpressed

asapoweroftwowhenconfiguredinbroadcastmode.Broadcastsreceived

priortotheexpiryofthisin

tervalar ediscarded.Allowedrangeis(6to10).

Defaultvalueis6.