CCNA培训 6第六章EIGRP、OSPF课件.ppt

(mended): Metric=[K1xBW+((K2xBW)/(256–load))+K3xdelay]Bydefault:K1=1,K2=0,K3=1,K4=0,K5=0Bydefault,EIGRPmetric=BW[lowestlink]+delay[sumoflinks].BW=thelowestlink-bandwidthalongthepathWhenK5ischangedtoavalueof1(mended): Metric=[K1xBW+((K2xBW)/(256–load))+K3xdelay] *[K5/(reliability+K4)]:K1=1,K2=0,K3=1,K4=0,K5=patibletoIGRPEIGRPMetricsCalculationExampleABCDLeastBandwidth64kbpsTotalDelay6,000AXYZDLeastBandwidth256kbpsTotalDelay8,000Delayisthesumofallthedelaysofthelinksalongthepaths:Delay=[delayintensofmicroseconds]x256BWisthelowestbandwidthofthelinksalongthepaths:BW=[10,000,000/(bandwidthinkbps)]x256EIGRPHelloTimersHellossentonceevery5secondsonthefollowinglinks:Broadcastmedia:,TokenRing,FiberDistributedDataInterface(FDDI)Point-to-pointseriallinks:Point-to-pointProtocol(PPP),High-LevelDataLinkControl(HDLC)Point-to-pointsubinterface:FrameRelay,ATMMultipointcircuitswithbandwidthgreaterthanT1:SwitchedMultimegabitDataService(SMDS),FrameRelay,ATM,ISDNPRIHellossentonceevery60secondsonthefollowinglinks:MultipointcircuitswithbandwidthlessthanorequaltoT1:ISDNBRI,FrameRelay,SMDS,ATM,