Chapter3OSPFConguration
S3(config-ospf-1)#showipforwardingroute1.1.1.11
IPv4RoutingTable:
DestGwInterfaceOwnerPriMetric
1.1.1.11/3233.32.1.1vlan40OSPF1102
UsepingonS2todetecttheconnectivityfromS3toS1.
S3#ping1.1.1.11
sending5,100-byteICMPechoesto1.1.1.11,timeoutis2seconds.
!!!!!
Successrateis100percent(5/5),round-tripmin/avg/max=1/1/2ms.
3.4.3OSPFMulti-InstanceConfigurationExample
CongurationDescription
Userscanconguremultipleprotocolinstances.Theseprotocolinstancescanbelong
tothesameVPN/publicnetworkordifferentVirtualPrivateNetworks(VPNs).Different
protocolinstancesareindependentofeachother.Theymaintaintheneighborrelationship,
LSDBoftheirownandcalculateroutes.However,themultipleinstancesbelongingtothe
sameVPN/pbulicnetworksharethesameVPN/publicnetworkroutingtable.Thisismainly
todivideandisolatenetworks.
Inthefollowingexample,CE1isolatestheinformationoodedbyPE1andPE2.The
networktopologyisshowninFigure3-15.
Figure3-15OSPFMulti-InstanceCongurationExample
CongurationThought
1.PE1andCE1establishOSPFneighborrelationship.
2.PE2andCE1establishOSPFneighborrelationship.
3.PE2shouldnotlearnthelink-stateinformationrelatedtovpn1.
CongurationProcess
CongurationonPE1:
3-49
SJ-20150114102049-003|2015-01-15(R1.0)ZTEProprietaryandCondential