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DynamicRoutingProtocols
2.4.2
DifferencesbetweenProtocolsRIPv1andRIPv2
TherearefollowingdifferencesbetweentheRIPv1andRIPv2versions:
DoesnotsupportclasslessCIDRrouting.
Uses255.255.255.255broadcasting
addressforupdates.
Alwaysperformsautomaticsummation
ofroutesattheborderofthemain
networks.
Itisnotpossibletoswitchoffthe
automaticsummationofroutes.
DoesnotsupportMD5authentication.
RIPv1
SupportsclasslessCIDRrouting.
Usesmulticastaddresstype224.0.0.9for
automaticdistributionofupdates.
Bydefault,automaticroute
summarizationattheborderofmain
networks,butcanbeswitchedoff.
Itispossibletoswitchofftheautomatic
summationofroutes.
SupportsMD5authentication.
RIPv2
Table2.9DifferencesbetweenRIPv1andRIPv2.
2.5EIGRPProtocol
2.5.1
IntroductiontoEIGRP
EnhancedInteriorGatewayRoutingProtocol(EIGRP)isaroutingprotocolusedfor
routingwithintheautonomoussystem.DesignedbyCiscoSystems.Theprotocoluses
metricsbasedondistancevectorandlinksstate,i.e.minimumbandwidthandtotaldelay
onthepathtothetargetnetwork.Thedefaultadministrativedistanceforthisprotocolis
90.ItusestheDiffusedUpdateAlgorithm(DUAL)tocalculateroutes.
MainfeaturesofEIGRPprotocol:
hascomplicatedmetric,
supportsvariablemaskaddressingtechniques(VLSM),
worksonlywithCiscoSystems’products,
hasashorterconvergencetimecomparedtotheIGRPprotocol.
theprotocolhasalowutilizationofnetworkresourcesduringnormal
operating(changesinthenetworkonlyresultinchangestopartsofthe
routingtable).
2.5.2
BasicConceptsonEIGRP
AutonomousSystemiswhatwecallacollectionofnetworksundercommon
administrationandusingthesameinternalroutingrules(forexampleacollectionof
networkslocatedinacompanyoraninstitution).
OneachrouterwithrunningEIGRPprotocolarestoredthreetables:
neighbortable,
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