Redistribuição de RIP dentro do OSPF em diferentes áreas com a utilização de link virtual
Comandos para os roteadores 4000, cisco1, cisco2 e cisco3
Configuração de uma interface serial:
<4000>#
<4000>#conf t
Enter configuration commands, one per line. End with CNTL/Z.
<4000>(config)#int s1
<4000>(config-if)#ip address 192.80.209.14 255.255.255.0
<4000>(config-if)#clock rate 800000
<4000>(config-if)#
Configuração de uma interface ethernet:
<4000>#
<4000>#conf t
Enter configuration commands, one per line. End with CNTL/Z.
<4000>(config)#int e0
<4000>(config-if)#ip address 192.80.100.1 255.255.255.0
<4000>(config-if)#
Configuração de uma interface loopback:
<4000>#conf t
Enter configuration commands, one per line. End with CNTL/Z.
<4000>(config)#int lo0
<4000>(config-if)#ip address 200.20.6.1 255.255.255.0
<4000>(config-if)#
Habilitação do proocolo RIP:
<4000>#conf t
Enter configuration commands, one per line. End with CNTL/Z.
<4000>(config)#router rip
<4000>(config-router)#
Anúncio das redes pelo RIP:
<4000>#conf t
Enter configuration commands, one per line. End with CNTL/Z.
<4000>(config)#router rip
<4000>(config-router)#network 200.20.6.0
<4000>(config-router)#
cisco1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
cisco1(config)#router rip
cisco1(config-router)#network 192.80.209.0
cisco1(config-router)#
Habilitação do proocolo OSPF:
cisco1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
cisco1(config)#router ospf 1
cisco1(config-router)#
Anúncio das redes pelo OSPF:
cisco1#
cisco1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
cisco1(config)#router ospf 1
cisco1(config-router)#network 200.156.10.1 0.0.0.255 area 0
cisco1(config-router)#network 200.20.94.81 0.0.0.255 area 1
cisco1(config-router)#
cisco2#
cisco2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
cisco2(config)#router ospf 1
cisco2(config-router)#network 200.20.94.1 0.0.0.255 area 1
cisco2(config-router)#network 200.20.3.1 0.0.0.255 area 2
cisco2(config-router)#network 200.20.4.1 0.0.0.255 area 2
cisco2(config-router)#
cisco3#
cisco3#conf t
Enter configuration commands, one per line. End with CNTL/Z.
cisco3(config)#router ospf 1
cisco3(config-router)#network 200.20.4.2 0.0.0.255 area 2
cisco3(config-router)#network 139.82.10.1 0.0.0.255 area 2
cisco3(config-router)#
cisco3#
<4000>#conf t
Enter configuration commands, one per line. End with CNTL/Z.
<4000>(config)#router ospf 1
<4000>(config-router)#network 192.80.209.14 0.0.0.255 area 0
<4000>(config-router)#network 192.80.100.1 0.0.0.255 area 0
<4000>(config-router)#network 200.20.6.1 0.0.0.255 area 0
<4000>(config-router)#
Rota default no 4000:
<4000>#
<4000>#conf t
Enter configuration commands, one per line. End with CNTL/Z.
<4000>(config)#ip route 0.0.0.0 0.0.0.0 192.80.209.13
<4000>(config)#
Redistribuindo RIP no OSPF:
cisco1#
cisco1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
cisco1(config)#router ospf 1
cisco1(config-router)#redistribute rip
cisco1(config-router)#
Descobrindo o Router ID:
cisco2#sh ip ospf
Routing Process "ospf 1" with ID 200.20.3.1
Supports only single TOS(TOS0) routes
SPF schedule delay 5 secs, Hold time between two SPFs 10 secs
Number of DCbitless external LSA 0
Number of DoNotAge external LSA 0
Number of areas in this router is 2. 2 normal 0 stub 0 nssa
Area BACKBONE(0) (Inactive)
Number of interfaces in this area is 0
Area has no authentication
SPF algorithm executed 1 times
Area ranges are
Link State Update Interval is 00:30:00 and due in 00:00:00
Link State Age Interval is 00:20:00 and due in 00:04:44
Number of DCbitless LSA 1
Number of indication LSA 1
Number of DoNotAge LSA 0
Area 2
Number of interfaces in this area is 2
Area has no authentication
SPF algorithm executed 5 times
Area ranges are
Link State Update Interval is 00:30:00 and due in 00:11:50
Link State Age Interval is 00:20:00 and due in 00:11:50
Number of DCbitless LSA 1
Number of indication LSA 0
Number of DoNotAge LSA 0
Criando o link virtual:
cisco2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
cisco2(config)#router ospf 1
cisco2(config-router)#area 1 virtual-link 200.156.10.1
cisco2(config-router)#
cisco1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
cisco1(config)#router ospf 1
cisco1(config-router)#area 1 virtual-link 200.20.3.1
cisco1(config-router)#
Salvando as configurações:
<4000>#
<4000>#copy running-config startup-config
Building configuration...
[OK]
<4000>#
Obs: para o cisco3 usar o comando 'write'
cisco3#
cisco3#write
#####[OK]
cisco3#
SHOW RUNNING -CONFIG Este comando é utilizado para verificar a configuração do roteador. Observar se a interface está UP/DOWN, os IPs de cada interface,quais redes são anunciads por RIP e quais são anunciadas por OSPF, com suas respectivas áreas e o vitual link criado para interligar a área 2 à área 0. <4000># <4000>#show running-config Building configuration... Current configuration: ! version 11.3 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname <4000> ! ! ! ! ! interface Loopback0 ip address 200.20.6.1 255.255.255.0 ! interface Ethernet0 ip address 192.80.100.1 255.255.255.0 ! interface Ethernet1 no ip address shutdown ! interface Serial0 no ip address no ip mroute-cache shutdown no fair-queue ! interface Serial1 ip address 192.80.209.14 255.255.255.0 clockrate 800000 ! interface Serial2 ip address 192.80.150.1 255.255.255.0 shutdown clockrate 800000 ! interface Serial3 no ip address shutdown ! router rip network 192.80.100.0 network 192.80.209.0 network 200.20.6.0 ! ip classless ip route 0.0.0.0 0.0.0.0 192.80.209.13 ! ! ! line con 0 line aux 0 line vty 0 4 login ! end <4000># Resultados cisco1 cisco1# cisco1#show running-config Building configuration... Current configuration: ! version 11.2 service timestamps debug uptime service timestamps log uptime service password-encryption no service udp-small-servers no service tcp-small-servers ! hostname cisco1 ! enable password 7 06100E324F41 ! ip subnet-zero no ip source-route no ip domain-lookup ! interface Loopback0 ip address 200.156.10.1 255.255.255.0 ! interface Ethernet0 ip address 200.20.94.81 255.255.255.0 ! interface Serial0 ip address 192.80.209.13 255.255.255.0 ! interface Serial1 no ip address shutdown ! router ospf 1 redistribute rip network 200.156.10.0 0.0.0.255 area 0 network 200.20.94.0 0.0.0.255 area 1 area 1 virtual-link 200.20.3.1 ! router rip network 192.80.209.0 ! ip classless ! ! line con 0 exec-timeout 0 0 password 7 060C0E2F494208 login line aux 0 line vty 0 4 password 7 000E120801570A login ! end cisco1# Resultados cisco2 cisco2# cisco2#show running-config Building configuration... Current configuration: ! version 11.2 service password-encryption no service udp-small-servers no service tcp-small-servers ! hostname cisco2 ! enable secret 5 $1$jibr$cTHEQancHt3LUqhsNxGXG0 ! no ip domain-lookup ! interface Loopback0 ip address 200.20.3.1 255.255.255.0 ! interface Ethernet0 ip address 200.20.94.1 255.255.255.0 no ip directed-broadcast ! interface Serial0 ip address 192.80.209.125 255.255.255.252 no ip directed-broadcast ip ospf network point-to-multipoint shutdown clockrate 800000 ! interface Serial1 ip address 200.20.4.1 255.255.255.0 no ip directed-broadcast ! router ospf 1 network 200.20.3.0 0.0.0.255 area 2 network 200.20.4.0 0.0.0.255 area 2 network 200.20.94.0 0.0.0.255 area 1 area 1 virtual-link 200.156.10.1 ! ip classless ! ! line con 0 password 7 0501070124404F line aux 0 password 7 0501070124404F line vty 0 1 password 7 0501070124404F login line vty 2 password 7 082B4D400C1504 login line vty 3 4 password 7 044904131B245E login ! end cisco2# Resultados cisco3 cisco3# cisco3#show configuration Using 444 out of 32762 bytes ! version 10.2 ! hostname cisco3 ! ! ! interface Loopback0 ip address 139.82.10.1 255.255.255.0 ! interface Ethernet0 ip address 192.80.100.1 255.255.255.0 shutdown ! interface Serial0 ip address 200.20.5.1 255.255.255.0 shutdown ! interface Serial1 ip address 200.20.4.2 255.255.255.0 clockrate 800000 ! router ospf 1 network 200.20.4.0 0.0.0.255 area 2 network 139.82.10.0 0.0.0.255 area 2 ! ! line con 0 line aux 0 line vty 0 4 login ! end cisco3#
Neste ítem serão mostrados dois comandos que são fundamentais para
que possamos tirar nossas conclusões.
São eles:show ip route e traceroute.
O primeiro nos mostra por qual interface e por qual protocolo o roteador
aprende as outras redes, já o segundo nos mostra os roteadores percorridos até o endereço de destino.
4000
<4000>#
<4000>#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate default
U - per-user static route, o - ODR
Gateway of last resort is 192.80.209.13 to network 0.0.0.0
C 192.80.209.0/24 is directly connected, Serial1
C 200.20.6.0/24 is directly connected, Loopback0
C 192.80.100.0/24 is directly connected, Ethernet0
S* 0.0.0.0/0 [1/0] via 192.80.209.13
Verificamos que o roteador 4000 tem uma rota default para 192.80.209.13 (Serial0 cisco1).
Isso significa que qualquer pacote com destino a redes desconhecidas pelo 4000 deve ser
enviado ao cisco1.
<4000>#
<4000>#traceroute 139.82.10.1
Type escape sequence to abort.
Tracing the route to 139.82.10.1
1 192.80.209.13 4 msec 0 msec 0 msec
2 200.20.94.1 8 msec 4 msec 4 msec
3 200.20.4.2 8 msec 4 msec *
<4000>#
Com o comando traceroute confirmamos o caminho de roteadores até o endereço
de destino, 139.82.10.1, Loopback0 do cisco3.
cisco1
cisco1#
cisco1#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate default
U - per-user static route, o - ODR
Gateway of last resort is not set
C 192.80.209.0/24 is directly connected, Serial0
C 200.156.10.0/24 is directly connected, Loopback0
C 200.20.94.0/24 is directly connected, Ethernet0
O IA 200.20.4.0/24 [110/74] via 200.20.94.1, 00:09:23, Ethernet0
139.82.0.0/32 is subnetted, 1 subnets
O IA 139.82.10.1 [110/74] via 200.20.94.1, 00:09:23, Ethernet0
R 200.20.6.0/24 [120/1] via 192.80.209.14, 00:00:22, Serial0
200.20.3.0/32 is subnetted, 1 subnets
O IA 200.20.3.1 [110/11] via 200.20.94.1, 00:09:23, Ethernet0
R 192.80.100.0/24 [120/1] via 192.80.209.14, 00:00:22, Serial0
Verificamos que o roteador cisco1 aprende as redes 200.20.6.0 e 192.80.100.0 por RIP, via
192.80.209.14 (Serial1 do 4000) e OSPF, através da interface Ethernet0, via 200.20.94.1
(Ethernet0 cisco2).
É importante notar que as redes que possuem ao lado IA: 200.20.4.0, 139.82.10.1, 200.20.3.1
fazem parte de áreas diferentes, por isso o nome de inter-área.
cisco1#
cisco1#traceroute 192.80.100.5
Type escape sequence to abort.
Tracing the route to 192.80.100.5
1 192.80.209.14 4 msec 4 msec 0 msec
2 192.80.100.5 4 msec 4 msec 4 msec
cisco1#
cisco1#traceroute 139.82.10.1
Type escape sequence to abort.
Tracing the route to 139.82.10.1
1 200.20.94.1 4 msec 4 msec 4 msec
2 200.20.4.2 8 msec * 4 msec
cisco1#
Com o comando traceroute confirmamos o caminho que o pacote percorre
até a 139.82.10.1 (Loopback0 do cisco3) e até o PC 192.80.100.5.
cisco2
cisco2#
cisco2#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate default
U - per-user static route, o - ODR
Gateway of last resort is not set
O E2 192.80.209.0/24 [110/20] via 200.20.94.81, 00:12:45, Ethernet0
200.156.10.0/32 is subnetted, 1 subnets
O 200.156.10.1 [110/11] via 200.20.94.81, 00:12:46, Ethernet0
C 200.20.94.0/24 is directly connected, Ethernet0
C 200.20.4.0/24 is directly connected, Serial1
139.82.0.0/32 is subnetted, 1 subnets
O 139.82.10.1 [110/64] via 200.20.4.2, 00:17:16, Serial1
O E2 200.20.6.0/24 [110/20] via 200.20.94.81, 00:10:00, Ethernet0
C 200.20.3.0/24 is directly connected, Loopback0
O E2 192.80.100.0/24 [110/20] via 200.20.94.81, 00:10:27, Ethernet0
Verificamos que o roteador cisco2 aprende as outras redes por OSPF através de suas interfaces
Serial1, via 200.20.4.2 (Serial1 cisco3) e Ethernet0 via 200.20.94.81 (Ethernet0 cisco1).
É importante ressaltar que as redes 192.80.209.0, 200.20.6.0 e 192.80.100.0 são anunciadas
pelo RIP e redistribuídas pelo OSPF.
Esse é o motivo de aparecer "E2" (external type 2) junto a essas rotas. Isso nos informa que elas
foram aprendidas por outro protocolo que não o OSPF.
cisco2#
cisco2#traceroute 192.80.100.5
Type escape sequence to abort.
Tracing the route to 192.80.100.5
1 200.20.94.81 4 msec 4 msec 4 msec
2 192.80.209.14 8 msec 4 msec 4 msec
3 192.80.100.5 4 msec 4 msec 8 msec
cisco2#
cisco2#traceroute 139.82.10.1
Type escape sequence to abort.
Tracing the route to 139.82.10.1
1 200.20.4.2 4 msec * 4 msec
cisco2#
Com o comando traceroute confirmamos o caminho que o pacote percorre
até a 139.82.10.1 (Loopback0 do cisco3) e até o PC 192.80.100.5.
cisco3
cisco3#
cisco3#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate default
Gateway of last resort is not set
O E2 192.80.209.0 [110/20] via 200.20.4.1, 00:15:10, Serial1
200.156.10.0 is subnetted (mask is 255.255.255.255), 1 subnets
O IA 200.156.10.1 [110/1573] via 200.20.4.1, 00:15:10, Serial1
O IA 200.20.94.0 [110/1572] via 200.20.4.1, 00:15:11, Serial1
C 200.20.4.0 is directly connected, Serial1
139.82.0.0 is subnetted (mask is 255.255.255.0), 1 subnets
C 139.82.10.0 is directly connected, Loopback0
O E2 200.20.6.0 [110/20] via 200.20.4.1, 00:12:29, Serial1
200.20.3.0 is subnetted (mask is 255.255.255.255), 1 subnets
O 200.20.3.1 [110/1563] via 200.20.4.1, 00:42:52, Serial1
O E2 192.80.100.0 [110/20] via 200.20.4.1, 00:12:56, Serial1
Verificamos então que o roteador cisco3 aprende as outras redes por OSPF através da interface
Serial1, via 200.20.4.1 (Serial1 cisco2).
É importante ressaltar que as redes 192.80.209.0, 200.20.6.0 e 192.80.100.0 são anunciadas
pelo RIP e redistribuídas pelo OSPF.
Esse é o motivo de aparecer "E2" (external type 2) junto a essas rotas. Isso nos informa que elas
foram aprendidas por outro protocolo que não o OSPF.
É importante notar, também, que as redes que possuem ao lado IA: 200.156.10.1, 200.20.94.0,
fazem parte de áreas diferentes, por isso o nome de inter-área.
cisco3#
cisco3#trace ip 192.80.100.5
Type escape sequence to abort.
Tracing the route to 192.80.100.5
1 200.20.4.1 4 msec 4 msec 4 msec
2 200.20.94.81 4 msec 4 msec 4 msec
3 192.80.209.14 8 msec 4 msec 4 msec
4 192.80.100.5 8 msec 8 msec 4 msec
cisco3#
Com o comando traceroute confirmamos o caminho que o pacote percorre
até o PC 192.80.100.5.
Página principal