OSPF 实验总结虚连接.docx
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OSPF实验总结虚连接
OSPFVirtual-link实验总结
使用3台路由器模拟实验，OSPF路由器进入FULL状态，路由生成。
配置如下：
R1#shver
CiscoIOSSoftware,3600Software（C3640-JS-M）,Version12.4（17）,RELEASESOFTWA
RE（fc1）
TechnicalSupport:
Copyright（c）1986-2007byCiscoSystems,Inc.
CompiledFri07-Sep-0720:
35byprod_rel_team
ROM:
ROMMONEmulationMicrocode
ROM:
3600Software（C3640-JS-M）,Version12.4（17）,RELEASESOFTWARE（fc1）
R1uptimeis10minutes
SystemreturnedtoROMbyunknownreloadcause-suspectboot_data[BOOT_COUNT]0
x0,BOOT_COUNT0,BOOTDATA19
Systemimagefileis"tftp:
//255.255.255.255/unknown"
Cisco3640（R4700）processor（revision0xFF）with94208K/4096Kbytesofmemory.
ProcessorboardID00000000
R4700CPUat100MHz,Implementation33,Rev1.2
4Ethernetinterfaces
4Serialinterfaces
DRAMconfigurationis64bitswidewithparityenabled.
125KbytesofNVRAM.
8192KbytesofprocessorboardSystemflash（Read/Write）
Configurationregisteris0x2102
R1#shrun
Buildingconfiguration...
Currentconfiguration:
1501bytes
!
version12.4
servicetimestampsdebugdatetimemsec
servicetimestampslogdatetimemsec
noservicepassword-encryption
!
hostnameR1
!
boot-start-marker
boot-end-marker
!
!
noaaanew-model
memory-sizeiomem5
!
!
ipcef
noipdomainlookup
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interfaceLoopback0
ipaddress200.17.1.1255.255.255.0
!
interfaceLoopback1
ipaddress100.1.64.4255.255.255.255
ipospf1area2
!
interfaceLoopback2
ipaddress100.1.64.5255.255.255.255
ipospf1area2
!
interfaceLoopback3
ipaddress100.1.64.6255.255.255.255
ipospf1area2
!
interfaceLoopback4
ipaddress100.1.64.7255.255.255.255
ipospf1area2
!
interfaceEthernet0/0
ipaddress132.17.12.1255.255.255.0
ipospfauthentication
ipospfauthentication-keysdx
full-duplex
!
interfaceEthernet0/1
noipaddress
shutdown
half-duplex
!
interfaceEthernet0/2
noipaddress
shutdown
half-duplex
!
interfaceEthernet0/3
noipaddress
shutdown
half-duplex
!
interfaceSerial1/0
noipaddress
shutdown
serialrestart-delay0
!
interfaceSerial1/1
noipaddress
shutdown
serialrestart-delay0
!
interfaceSerial1/2
noipaddress
shutdown
serialrestart-delay0
!
interfaceSerial1/3
noipaddress
shutdown
serialrestart-delay0
!
routerospf1
log-adjacency-changes
network132.17.12.10.0.0.0area2
network200.17.1.10.0.0.0area2
!
iphttpserver
ipforward-protocolnd
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
linecon0
lineaux0
linevty04
login
!
!
end
R1#
R2#shrun
Buildingconfiguration...
Currentconfiguration:
1381bytes
!
version12.4
servicetimestampsdebugdatetimemsec
servicetimestampslogdatetimemsec
noservicepassword-encryption
!
hostnameR2
!
boot-start-marker
boot-end-marker
!
!
noaaanew-model
memory-sizeiomem5
!
!
ipcef
noipdomainlookup
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interfaceLoopback0
ipaddress200.17.2.2255.255.255.0
!
interfaceEthernet0/0
ipaddress132.17.23.2255.255.255.0
ipospfauthenticationmessage-digest
ipospfmessage-digest-key1md5sdx
full-duplex
!
interfaceEthernet0/1
ipaddress132.17.12.2255.255.255.0
ipospfauthentication
ipospfauthentication-keysdx
full-duplex
!
interfaceEthernet0/2
noipaddress
shutdown
half-duplex
!
interfaceEthernet0/3
noipaddress
shutdown
half-duplex
!
interfaceSerial1/0
noipaddress
shutdown
serialrestart-delay0
!
interfaceSerial1/1
noipaddress
shutdown
serialrestart-delay0
!
interfaceSerial1/2
noipaddress
shutdown
serialrestart-delay0
!
interfaceSerial1/3
noipaddress
shutdown
serialrestart-delay0
!
routerospf1
log-adjacency-changes
area1virtual-link200.17.3.3authenticationauthentication-keysdx
network132.17.12.20.0.0.0area2
network132.17.23.20.0.0.0area1
network200.17.2.20.0.0.0area2
!
iphttpserver
ipforward-protocolnd
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
linecon0
lineaux0
linevty04
login
!
!
end
R2#
R3#shrun
Buildingconfiguration...
Currentconfiguration:
1276bytes
!
version12.4
servicetimestampsdebugdatetimemsec
servicetimestampslogdatetimemsec
noservicepassword-encryption
!
hostnameR3
!
boot-start-marker
boot-end-marker
!
!
noaaanew-model
memory-sizeiomem5
!
!
ipcef
noipdomainlookup
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interfaceLoopback0
ipaddress200.17.3.3255.255.255.0
!
interfaceEthernet0/0
noipaddress
shutdown
half-duplex
!
interfaceEthernet0/1
ipaddress132.17.23.3255.255.255.0
ipospfauthenticationmessage-digest
ipospfmessage-digest-key1md5sdx
full-duplex
!
interfaceEthernet0/2
noipaddress
shutdown
half-duplex
!
interfaceEthernet0/3
noipaddress
shutdown
half-duplex
!
interfaceSerial1/0
noipaddress
shutdown
serialrestart-delay0
!
interfaceSerial1/1
noipaddress
shutdown
serialrestart-delay0
!
interfaceSerial1/2
noipaddress
shutdown
serialrestart-delay0
!
interfaceSerial1/3
noipaddress
shutdown
serialrestart-delay0
!
routerospf1
log-adjacency-changes
area1virtual-link200.17.2.2authenticationauthentication-keysdx
network132.17.23.30.0.0.0area1
network200.17.3.30.0.0.0area0
!
iphttpserver
ipforward-protocolnd
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
linecon0
lineaux0
linevty04
login
!
!
end
R3#
注：
如果Virtual-link没有建立成功，R1和R2的OSPF路由可以互通；R2和R3的OSPF路由可以互通；R1学不到R3的路由但R3可以学到R1路由，出现单通情况。
在R1和R2的OSPF路由进程内增加area2stub语句后，路由变化情况如下：
R1#shiproute
Codes:
C-connected,S-static,R-RIP,M-mobile,B-BGP
D-EIGRP,EX-EIGRPexternal,O-OSPF,IA-OSPFinterarea
N1-OSPFNSSAexternaltype1,N2-OSPFNSSAexternaltype2
E1-OSPFexternaltype1,E2-OSPFexternaltype2
i-IS-IS,su-IS-ISsummary,L1-IS-ISlevel-1,L2-IS-ISlevel-2
ia-IS-ISinterarea,*-candidatedefault,U-per-userstaticroute
o-ODR,P-periodicdownloadedstaticroute
Gatewayoflastresortis132.17.12.2tonetwork0.0.0.0
100.0.0.0/32issubnetted,4subnets
C100.1.64.5isdirectlyconnected,Loopback2
C100.1.64.4isdirectlyconnected,Loopback1
C100.1.64.7isdirectlyconnected,Loopback4
C100.1.64.6isdirectlyconnected,Loopback3
C200.17.1.0/24isdirectlyconnected,Loopback0
200.17.2.0/32issubnetted,1subnets
O200.17.2.2[110/11]via132.17.12.2,00:
00:
19,Ethernet0/0
200.17.3.0/32issubnetted,1subnets
OIA200.17.3.3[110/21]via132.17.12.2,00:
00:
19,Ethernet0/0
132.17.0.0/24issubnetted,2subnets
OIA132.17.23.0[110/20]via132.17.12.2,00:
00:
19,Ethernet0/0
C132.17.12.0isdirectlyconnected,Ethernet0/0
O*IA0.0.0.0/0[110/11]via132.17.12.2,00:
00:
20,Ethernet0/0
在R1的OSPF路由进程内增加area2stub语句，在R2的OSPF路由进程内增加area2stubno-summary后的路由变化情况如下：
R1#shiproute
Codes:
C-connected,S-static,R-RIP,M-mobile,B-BGP
D-EIGRP,EX-EIGRPexternal,O-OSPF,IA-OSPFinterarea
N1-OSPFNSSAexternaltype1,N2-OSPFNSSAexternaltype2
E1-OSPFexternaltype1,E2-OSPFexternaltype2
i-IS-IS,su-IS-ISsummary,L1-IS-ISlevel-1,L2-IS-ISlevel-2
ia-IS-ISinterarea,*-candidatedefault,U-per-userstaticroute
o-ODR,P-periodicdownloadedstaticroute
Gatewayoflastresortis132.17.12.2tonetwork0.0.0.0
100.0.0.0/32issubnetted,4subnets
C100.1.64.5isdirectlyconnected,Loopback2
C100.1.64.4isdirectlyconnected,Loopback1
C100.1.64.7isdirectlyconnected,Loopback4
C100.1.64.6isdirectlyconnected,Loopback3
C200.17.1.0/24isdirectlyconnected,Loopback0
200.17.2.0/32issubnetted,1subnets
O200.17.2.2[110/11]via132.17.12.2,00:
07:
53,Ethernet0/0
132.17.0.0/24issubnetted,1subnets
C132.17.12.0isdirectlyconnected,Ethernet0/0
O*IA0.0.0.0/0[110/11]via132.17.12.2,00:
00:
09,Ethernet0/0
R1#
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