Specifications

WDS and STP
RoamAbout RBT-4102 Wireless Access Point Configuration Guide 4-53
‐ Range:0‐65535
‐ Default:32768
– BridgeMaxAgeisthemaximumtime(inseconds)adevicecanwaitwithoutreceivinga
configurationmessagebeforeattemptingtoreconfigure.Alldeviceports(exceptfor
designatedports)shouldreceiveconfigurationmessagesatregularintervals.Anyport
thatagesoutSTPinformation(providedin
thelastconfigurationmessage)becomesthe
designatedportfortheattachedLAN.Ifitisarootport,anewrootportisselectedfrom
amongthedeviceportsattachedtothenetwork.Range:6‐40seconds
‐ Default:20
‐ Minimum:Thehigherof6or[2x(HelloTime+1)].
‐ Maximum:Thelowerof40or[2x(ForwardDelay‐1)]
– BridgeHelloTimeistheinterval(inseconds)atwhichtherootdevicetransmitsa
configurationmessage.Range:1‐10seconds
‐ Default:2
‐ Minimum:1
‐ Maximum:Thelowerof10or[(Max.MessageAge/2)‐1]
– BridgeForward
Delayisthemaximumtime(inseconds)thisdevicewaitsbeforechanging
states(forexample,discardingtolearningtoforwarding).Thisdelayisrequiredbecause
everydevicemustreceiveinformationabouttopologychangesbeforeitstartstoforward
frames.Inaddition,eachportneedstimetolistenforconflictinginformationthat
would
makeitreturntoadiscardingstate;otherwise,temporarydataloopsmightresult.Range:
4‐30seconds
‐ Default:15
‐ Minimum:Thehigherof4or[(Max.MessageAge/2)+1]
‐ Maximum:30
– LinkPathCostisusedbytheSTPtodeterminethebestpathbetweendevices.
Therefore,
lowervaluesshouldbeassignedtoportsattachedtofastermedia,andhighervalues
assignedtoportswithslowermedia.Pathcosttakesprecedenceoverportpriority.
‐ Range:1‐65535
‐ Default:Ethernetinterface:19;Wirelessinterface:40
– LinkPortPrioritydefinesthepriorityusedforthis portintheSpanning
TreeProtocol.If
thepathcostforallportsonaswitcharethesame,theportwiththehighestpriority(for
example,lowestvalue)willbeconfiguredasanactivelinkinthespanningtree.This
makesaportwithhigherprioritylesslikelytobeblockedifthe
SpanningTreeProtocolis
detectingnetworkloops.Wheremorethanoneportisassignedthehighestpriority,the
portwithlowestnumericidentifierwillbeenabled.
‐ Default:128
‐ Range:0‐255,instepsof16