缺省路由.docx
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缺省路由.docx
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缺省路由
实验拓扑:
怎样产生默认路由?
预配置:
R1:
Router(config)#noipdomain-lookup
Router(config)#lineconsole0
Router(config-line)#noexec-t
Router(config-line)#loggingsy
Router(config-line)#exit
Router(config)#hostR1
R1(config)#ints2/1
R1(config-if)#ipaddress12.0.0.1255.255.255.0
R1(config-if)#noshut
R2:
Router(config)#noipdomain-lookup
Router(config)#lineconsole0
Router(config-line)#noexec-t
Router(config-line)#loggingsy
Router(config-line)#exit
Router(config)#hostnameR2
R2(config)#ints2/1
R2(config-if)#ipaddress12.0.0.2255.255.255.0
R2(config-if)#noshut
R2(config-if)#ints2/2
R2(config-if)#ipaddress23.0.0.2255.255.255.0
R2(config-if)#noshut
R3:
Router(config)#noipdomain-lookup
Router(config)#lineconsole0
Router(config-line)#noexec-t
Router(config-line)#loggingsy
Router(config-line)#exit
Router(config)#hostnameR3
R3(config)#ints2/1
R3(config-if)#ipaddress23.0.0.3255.255.255.0
R3(config-if)#noshut
实验配置:
第一种:
R1#showiproute
*Jan2222:
15:
51.059:
%SYS-5-CONFIG_I:
Configuredfromconsolebycons
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
Gatewayoflastresortisnotset
23.0.0.0/24issubnetted,1subnets
R23.0.0.0[120/1]via12.0.0.2,00:
00:
24,Serial2/1
12.0.0.0/24issubnetted,1subnets
C12.0.0.0isdirectlyconnected,Serial2/1
R2(config)#doshowiproute
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
Gatewayoflastresortisnotset
23.0.0.0/24issubnetted,1subnets
C23.0.0.0isdirectlyconnected,Serial2/2
12.0.0.0/24issubnetted,1subnets
C12.0.0.0isdirectlyconnected,Serial2/1
R1(config)#routerrip
R1(config-router)#ver2
R1(config-router)#noau
R1(config-router)#net12.0.0.0
R1(config-router)#exit
R1(config)#exit
R2(config)#routerrip
R2(config-router)#ver2
R2(config-router)#noau
R2(config-router)#net12.0.0.0
R2(config-router)#net23.0.0.0
R2(config-router)#exit
R3(config)#intlo0
R3(config-if)#ipaddress3.3.3.3255.255.255.0
R3(config-if)#intlo1
R3(config-if)#ipaddress172.16.1.1255.255.255.0
R3(config)#routerrip
R3(config-router)#version2
R3(config-router)#noauto-summary
R3(config-router)#net23.0.0.0
R3(config)#iproute0.0.0.00.0.0.0172.16.1.2
R3(config)#routerrip
R3(config-router)#redistributestaticmetric1
R1#showiproute
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
Gatewayoflastresortis12.0.0.2tonetwork0.0.0.0
23.0.0.0/24issubnetted,1subnets
R23.0.0.0[120/1]via12.0.0.2,00:
00:
07,Serial2/1
12.0.0.0/24issubnetted,1subnets
C12.0.0.0isdirectlyconnected,Serial2/1
R*0.0.0.0/0[120/2]via12.0.0.2,00:
00:
07,Serial2/1
R1#ping3.3.3.3
Typeescapesequencetoabort.
Sending5,100-byteICMPEchosto3.3.3.3,timeoutis2seconds:
!
!
!
!
!
Successrateis100percent(5/5),round-tripmin/avg/max=24/50/92ms
R2(config)#doshowiproute
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
Gatewayoflastresortis23.0.0.3tonetwork0.0.0.0
23.0.0.0/24issubnetted,1subnets
C23.0.0.0isdirectlyconnected,Serial2/2
12.0.0.0/24issubnetted,1subnets
C12.0.0.0isdirectlyconnected,Serial2/1
R*0.0.0.0/0[120/1]via23.0.0.3,00:
00:
13,Serial2/2
R3#showiproute
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
Gatewayoflastresortis172.16.1.2tonetwork0.0.0.0
3.0.0.0/24issubnetted,1subnets
C3.3.3.0isdirectlyconnected,Loopback0
23.0.0.0/24issubnetted,1subnets
C23.0.0.0isdirectlyconnected,Serial2/1
172.16.0.0/24issubnetted,1subnets
C172.16.1.0isdirectlyconnected,Loopback1
12.0.0.0/24issubnetted,1subnets
R12.0.0.0[120/1]via23.0.0.2,00:
00:
10,Serial2/1
S*0.0.0.0/0[1/0]via172.16.1.2
第二种
R1与R2不变,
R3(config)#noiproute0.0.0.00.0.0.0172.16.1.2
R3(config)#routerrip
R3(config-router)#noredistributestaticmetric1
R3(config)#routerrip
R3(config-router)#default-informationoriginate
R3(config-router)#exit
R1#showiproute
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
Gatewayoflastresortisnotset
23.0.0.0/24issubnetted,1subnets
D23.0.0.0[90/2681856]via12.0.0.2,00:
00:
57,Serial2/1
12.0.0.0/24issubnetted,1subnets
C12.0.0.0isdirectlyconnected,Serial2/1
R1#ping23.0.0.3
Typeescapesequencetoabort.
Sending5,100-byteICMPEchosto23.0.0.3,timeoutis2seconds:
!
!
!
!
!
R3(config)#doshowiproute
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
Gatewayoflastresortisnotset
3.0.0.0/24issubnetted,1subnets
C3.3.3.0isdirectlyconnected,Loopback0
23.0.0.0/24issubnetted,1subnets
C23.0.0.0isdirectlyconnected,Serial2/1
172.16.0.0/24issubnetted,1subnets
C172.16.1.0isdirectlyconnected,Loopback1
12.0.0.0/24issubnetted,1subnets
R12.0.0.0[120/1]via23.0.0.2,00:
00:
23,Serial2/1
第三种:
R1(config)#norouterrip
R1(config)#routereigrp100
R1(config-router)#net12.0.0.10.0.0.255
R2(config)#norouterrip
R2(config)#routereigrp100
R2(config-router)#net12.0.0.20.0.0.255
R2(config-router)#net23.0.0.20.0.0.255
R2(config-router)#noau
R3(config)#norouterrip
R3(config)#routereigrp100
R3(config-router)#net23.0.0.30.0.0.255
R3(config-router)#net172.16.1.10.0.0.255
R3(config)#ipdefault-network172.16.0.0
如果加了下面两个中的任意一个:
R3(config)#routereigrp100
R3(config-router)#noauto-summary
--------------------------------------------------------------------------------------------------
R3(config)#ints2/1
R3(config-if)#ipsummary-addresseigrp100172.16.0.0255.255.0.0
R1#showiproute
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
Gatewayoflastresortis12.0.0.2tonetwork172.16.0.0
23.0.0.0/24issubnetted,1subnets
D23.0.0.0[90/2681856]via12.0.0.2,00:
03:
49,Serial2/1
D*172.16.0.0/16[90/2809856]via12.0.0.2,00:
00:
18,Serial2/1
12.0.0.0/24issubnetted,1subnets
C12.0.0.0isdirectlyconnected,Serial2/1
R2#showiproute
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
Gatewayoflastresortisnotset
23.0.0.0/24issubnetted,1subnets
C23.0.0.0isdirectlyconnected,Serial2/2
D*172.16.0.0/16[90/2297856]via23.0.0.3,00:
00:
04,Serial2/2
12.0.0.0/24issubnetted,1subnets
C12.0.0.0isdirectlyconnected,Serial2/1
如果不加:
R1#showiproute
Codes:
C-connected,S-static,R-RIP,M-mobile,B-BGP
D-EIGRP,EX-EIGRPexternal,O-OSPF,IA-OSPFinterarea
N1-OSPFNSSAexternaltype1,N2-OSPFNSSAexternal
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- 缺省 路由