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1、bgp应用解析：重分发及优化路由I.redistribution1,weightdistribution,referstoanorganizationrunningmultipleroutingprotocols,musttakethewayofaroutingprotocolthatinformtheothernetworkroutingprotocol,witheachendpointcanreachtheotherpoint,itisaprocessofredistribution.Althoughthechoiceof
2、avarietyofroutingprotocolrimningintheorganization,buteachkindofinternalroutingprotocolsareconsideredtobetheonlyASinternalroutingprotocol,suchasEIGRPdistributedtoOSPF,OSPFthinkEIGRPisfromtheexternalroutingexternalAS.2night,routing,weightdistribution,allnetworkswillbe
3、addedtotheroutingtableandroutingdecisionismadeaccordingtothetableinthecurrentnetwork,buttheroutingprotocolonlythroughtheprocessofnotificationinformednetwork;routingonnetworksystemofinformationsharingbetweenprocesses,knownasthenightrouting(shipsin,night,SIN).3,thedef
4、aultmetric,RIP,IGRP,EIGRPdefaultseedmetricsareinfinite,theydonotentertheroutingtableunlessyouchangethedefaultvalue;thedefaultvalueis0IS-ISmetricbutitcanentertheroutingtable;thedefaultOSPFmetricis2LSAand20BGPfromthevalueoftherouteis1BGP;MEDisIGPmeasure・4,whendifferen
5、tprotocolsanddifferentpathsexist,themanagementdistanceandthemetricvalueareusedtomakethechoice:Inamultiprotocolrouter,theroutethatmanagesthesmallestdistanceisaddedtotheroutingtable;--addasmallmeasuretotheselectiontableinthepathwheremultiplepathsarepresent;Torouteredi
6、stribution,theroutemustbeinthecorrespondingroutingtable,forexample,toredistributetheRIPtotheEIGRP,andthatRIProutemustbeintheRIProutingtable;Whentherouteisredistributed,themanagementdistanceofthetargetroutingprotocolismanagedfromthedefaultdistance;-redistributionofro
7、utesisconsideredanexternalroute,andredistributionofBGPandElGRPisconsideredanexternalroute,whiletheinternalroutingispreferred.Two,weightdistributionmayleadtoselectionandroutingloop,inordertoavoidtheseproblemscanbeconsidered:usedefaultrouting,usingthepassiveinterface,
8、usingthedistributionlist,usingonlyasingledirectionoftheweightdistributionastheRIPdistributiontoEIGRP,modifythemeasure,modifymanagementdist
