Ruteo con OSPF#

Topología de red#

Se utilizará la misma topología para todos los protocolos de ruteo internos:
Topología para protocolos de ruteo internos
Archivo de Packet Tracer con la topología de red
Archivo de Packet Tracer con la implementación de ruteo OSPF

Cada router tiene las siguientes interfaces

Interfaz Tipo Conexión
GigabitEthernet0/0 Fibra Óptica Hacia otro router
GigabitEthernet1/0 Fibra Óptica Hacia otro router
GigabitEthernet2/0 Ethernet Hacia red LAN
Interfaces de red de routers

Las redes presentes en esta topología son las siguientes:

Redes de equipos

Red Equipo Dirección IP Máscara de red
A PC-0 192.168.0.1 255.255.255.0
A SW-0 192.168.0.253 255.255.255.0
A R1 192.168.0.254 255.255.255.0
B Server-1 10.10.10.1 255.255.255.0
B SW-1 10.10.10.253 255.255.255.0
B R1 10.10.10.254 255.255.255.0
C Server-2 10.20.20.1 255.255.255.0
C SW-2 10.20.20.253 255.255.255.0
C R2 10.20.20.254 255.255.255.0
D Laptop-3 192.168.100.1 255.255.255.0
D SW-3 192.168.100.253 255.255.255.0
D R3 192.168.100.254 255.255.255.0

Redes que interconectan a los ruteadores

Red Equipo Dirección IP Máscara de red
W R0 172.16.0.1 255.255.255.252
W R1 172.16.0.2 255.255.255.252
X R1 172.16.1.1 255.255.255.252
X R2 172.16.1.2 255.255.255.252
Y R2 172.16.2.1 255.255.255.252
Y R3 172.16.2.2 255.255.255.252
Z R3 172.16.3.1 255.255.255.252
Z R0 172.16.3.2 255.255.255.252

Configuración en Cisco IOS#

La configuración se realiza en tres partes por cada router

  1. Equipos directamente conectados
  2. Redes intermedias de interconexión
  3. Red con destino indirecto

La configuración se debe realizar en el modo de configuración global

Router-0> enable Router-0# configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router-0(config)#

Al finalizar la configuración se debe ejecutar el comando end para aplicar los cambios

Router-0(config)# end Router-0# %SYS-5-CONFIG_I: Configured from console by console

Para mostrar la tabla de rutas se utiliza el comando show ip route que muestra la siguiente leyenda sobre las rutas del equipo:

``` Router-0# 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, ia - IS-IS inter area * - candidate default, U - per-user static route, o - ODR P - periodic downloaded static route ```

Configuración para Router-0#

Agregar interfaz loopback#

enable configure terminal ! Configurar la interfaz loopback interface loopback 0 ip address 172.31.255.1 255.255.255.0 ! Finalizar la configuración end

Configurar OSPF#

enable configure terminal ! Habilitar OSPF en el ruteador con el PID=1 router ospf 1 ! Establecer el ID del ruteador para OSPF router-id 172.31.255.1 ! Publicar las redes mediante OSPF network 192.168.0.254 0.0.0.255 area 0 network 172.16.0.1 0.0.0.3 area 0 network 172.16.3.2 0.0.0.3 area 0 ! Finalizar la configuración end

Mensajes de confirmación de vecinos OSPF#

Después de configurar adecuadamente todos los ruteadores se verán los mensajes que confirman que el ruteador pudo establecer relación con los vecinos

``` 00:00:40: %OSPF-5-ADJCHG: Process 1, Nbr 172.31.255.4 on GigabitEthernet1/0 from LOADING to FULL, Loading Done

00:00:45: %OSPF-5-ADJCHG: Process 1, Nbr 172.31.255.2 on GigabitEthernet0/0 from LOADING to FULL, Loading Done ```

Configuración para Router-1#

Agregar interfaz loopback#

enable configure terminal ! Configurar la interfaz loopback interface loopback 0 ip address 172.31.255.2 255.255.255.0 ! Finalizar la configuración end

Configurar OSPF#

enable configure terminal ! Habilitar OSPF en el ruteador con el PID=1 router ospf 1 ! Establecer el ID del ruteador para OSPF router-id 172.31.255.2 ! Publicar las redes mediante OSPF network 10.10.10.254 0.0.0.255 area 0 network 172.16.0.2 0.0.0.3 area 0 network 172.16.1.1 0.0.0.3 area 0 ! Finalizar la configuración end

Mensajes de confirmación de vecinos OSPF#

``` 00:00:40: %OSPF-5-ADJCHG: Process 1, Nbr 172.31.255.1 on GigabitEthernet0/0 from LOADING to FULL, Loading Done

00:00:45: %OSPF-5-ADJCHG: Process 1, Nbr 172.31.255.3 on GigabitEthernet1/0 from LOADING to FULL, Loading Done ```

Configuración para Router-2#

Agregar interfaz loopback#

enable configure terminal ! Configurar la interfaz loopback interface loopback 0 ip address 172.31.255.3 255.255.255.0 ! Finalizar la configuración end

Configurar OSPF#

enable configure terminal ! Habilitar OSPF en el ruteador con el PID=1 router ospf 1 ! Establecer el ID del ruteador para OSPF router-id 172.31.255.3 ! Publicar las redes mediante OSPF network 10.20.20.254 0.0.0.255 area 0 network 172.16.1.2 0.0.0.3 area 0 network 172.16.2.1 0.0.0.3 area 0 ! Finalizar la configuración end

Mensajes de confirmación de vecinos OSPF#

``` 00:00:40: %OSPF-5-ADJCHG: Process 1, Nbr 172.31.255.2 on GigabitEthernet1/0 from LOADING to FULL, Loading Done

00:00:45: %OSPF-5-ADJCHG: Process 1, Nbr 172.31.255.4 on GigabitEthernet0/0 from LOADING to FULL, Loading Done ```

Configuración para Router-3#

Agregar interfaz loopback#

enable configure terminal ! Configurar la interfaz loopback interface loopback 0 ip address 172.31.255.4 255.255.255.0 ! Finalizar la configuración end

Configurar OSPF#

enable configure terminal ! Habilitar OSPF en el ruteador con el PID=1 router ospf 1 ! Establecer el ID del ruteador para OSPF router-id 172.31.255.4 ! Publicar las redes mediante OSPF network 192.168.100.254 0.0.0.255 area 0 network 172.16.2.2 0.0.0.3 area 0 network 172.16.3.1 0.0.0.3 area 0 ! Finalizar la configuración end

Mensajes de confirmación de vecinos OSPF#

``` 00:00:40: %OSPF-5-ADJCHG: Process 1, Nbr 172.31.255.1 on GigabitEthernet0/0 from LOADING to FULL, Loading Done

00:00:45: %OSPF-5-ADJCHG: Process 1, Nbr 172.31.255.3 on GigabitEthernet1/0 from LOADING to FULL, Loading Done ```

--------------------------------------------------------------------------------#

Diagnóstico de OSPF en los ruteadores#

Información de diagnóstico para Router-0#

Tabla de rutas#

``` Router-0# show ip route

Gateway of last resort is not set

 172.16.0.0/30 is subnetted, 2 subnets

C 172.16.0.0 is directly connected, GigabitEthernet0/0 C 172.16.3.0 is directly connected, GigabitEthernet1/0 172.31.0.0/24 is subnetted, 1 subnets C 172.31.255.0 is directly connected, Loopback0 C 192.168.0.0/24 is directly connected, GigabitEthernet2/0 ```

Tabla de rutas obtenidas por OSPF#

Router-0# show ip route ospf 10.0.0.0/24 is subnetted, 2 subnets O 10.10.10.0 [110/2] via 172.16.0.2, 00:00:06, GigabitEthernet0/0 O 10.20.20.0 [110/3] via 172.16.0.2, 00:00:06, GigabitEthernet0/0 [110/3] via 172.16.3.1, 00:00:06, GigabitEthernet1/0 172.16.0.0/30 is subnetted, 4 subnets O 172.16.1.0 [110/2] via 172.16.0.2, 00:00:06, GigabitEthernet0/0 O 172.16.2.0 [110/2] via 172.16.3.1, 00:00:06, GigabitEthernet1/0 O 192.168.100.0 [110/2] via 172.16.3.1, 00:00:06, GigabitEthernet1/0

Información de OSPF#

Router-0# show ip ospf Routing Process "ospf 1" with ID 172.31.255.1 Supports only single TOS(TOS0) routes Supports opaque LSA SPF schedule delay 5 secs, Hold time between two SPFs 10 secs Minimum LSA interval 5 secs. Minimum LSA arrival 1 secs Number of external LSA 0. Checksum Sum 0x000000 Number of opaque AS LSA 0. Checksum Sum 0x000000 Number of DCbitless external and opaque AS LSA 0 Number of DoNotAge external and opaque AS LSA 0 Number of areas in this router is 1. 1 normal 0 stub 0 nssa External flood list length 0 Area BACKBONE(0) Number of interfaces in this area is 3 Area has no authentication SPF algorithm executed 2 times Area ranges are Number of LSA 8. Checksum Sum 0x056de8 Number of opaque link LSA 0. Checksum Sum 0x000000 Number of DCbitless LSA 0 Number of indication LSA 0 Number of DoNotAge LSA 0 Flood list length 0

Información detallada de interfaces con OSPF#

``` Router-0# show ip ospf interface

GigabitEthernet0/0 is up, line protocol is up Internet address is 172.16.0.1/30, Area 0 Process ID 1, Router ID 172.31.255.1, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State BDR, Priority 1 Designated Router (ID) 172.31.255.2, Interface address 172.16.0.2 Backup Designated Router (ID) 172.31.255.1, Interface address 172.16.0.1 Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:06 Index 1/1, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 1, maximum is 1 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 1, Adjacent neighbor count is 1 Adjacent with neighbor 172.31.255.2 (Designated Router) Suppress hello for 0 neighbor(s) GigabitEthernet1/0 is up, line protocol is up Internet address is 172.16.3.2/30, Area 0 Process ID 1, Router ID 172.31.255.1, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State BDR, Priority 1 Designated Router (ID) 172.31.255.4, Interface address 172.16.3.1 Backup Designated Router (ID) 172.31.255.1, Interface address 172.16.3.2 Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:06 Index 2/2, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 1, maximum is 1 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 1, Adjacent neighbor count is 1 Adjacent with neighbor 172.31.255.4 (Designated Router) Suppress hello for 0 neighbor(s) GigabitEthernet2/0 is up, line protocol is up Internet address is 192.168.0.254/24, Area 0 Process ID 1, Router ID 172.31.255.1, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State DR, Priority 1 Designated Router (ID) 172.31.255.1, Interface address 192.168.0.254 No backup designated router on this network Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:06 Index 3/3, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 1, maximum is 1 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 0, Adjacent neighbor count is 0 Suppress hello for 0 neighbor(s) ```

Tabla de vecinos de OSPF#

``` Router-0# show ip ospf neighbor

Neighbor ID Pri State Dead Time Address Interface 172.31.255.2 1 FULL/DR 00:00:36 172.16.0.2 GigabitEthernet0/0 172.31.255.4 1 FULL/DR 00:00:36 172.16.3.1 GigabitEthernet1/0 ```

Detalle de vecinos OSPF#

Router-0# show ip ospf neighbor detail Neighbor 172.31.255.2, interface address 172.16.0.2 In the area 0 via interface GigabitEthernet0/0 Neighbor priority is 1, State is FULL, 6 state changes DR is 172.16.0.2 BDR is 172.16.0.1 Options is 0x00 Dead timer due in 00:00:38 Neighbor is up for 00:04:01 Index 1/1, retransmission queue length 0, number of retransmission 0 First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0) Last retransmission scan length is 0, maximum is 1 Last retransmission scan time is 0 msec, maximum is 0 msec Neighbor 172.31.255.4, interface address 172.16.3.1 In the area 0 via interface GigabitEthernet1/0 Neighbor priority is 1, State is FULL, 6 state changes DR is 172.16.3.1 BDR is 172.16.3.2 Options is 0x00 Dead timer due in 00:00:38 Neighbor is up for 00:04:01 Index 2/2, retransmission queue length 0, number of retransmission 0 First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0) Last retransmission scan length is 0, maximum is 0 Last retransmission scan time is 0 msec, maximum is 0 msec

Base de datos OSPF#

``` Router-0# show ip ospf database OSPF Router with ID (172.31.255.1) (Process ID 1)

            Router Link States (Area 0)

Link ID ADV Router Age Seq# Checksum Link count 172.31.255.2 172.31.255.2 207 0x80000005 0x007802 3 172.31.255.1 172.31.255.1 207 0x80000006 0x009c90 3 172.31.255.3 172.31.255.3 207 0x80000005 0x0087d8 3 172.31.255.4 172.31.255.4 207 0x80000006 0x00dde0 3

            Net Link States (Area 0)

Link ID ADV Router Age Seq# Checksum 172.16.1.2 172.31.255.3 212 0x80000001 0x00e1eb 172.16.0.2 172.31.255.2 207 0x80000001 0x005ed3 172.16.3.1 172.31.255.4 207 0x80000001 0x00d3f7 172.16.2.2 172.31.255.4 207 0x80000002 0x00dee9 ```

Información de diagnóstico para Router-1#

Tabla de rutas#

``` Router-1# show ip route

Gateway of last resort is not set

 10.0.0.0/24 is subnetted, 2 subnets

C 10.10.10.0 is directly connected, GigabitEthernet2/0 O 10.20.20.0 [110/2] via 172.16.1.2, 00:00:24, GigabitEthernet0/0 172.16.0.0/30 is subnetted, 4 subnets C 172.16.0.0 is directly connected, GigabitEthernet1/0 C 172.16.1.0 is directly connected, GigabitEthernet0/0 O 172.16.2.0 [110/2] via 172.16.1.2, 00:00:24, GigabitEthernet0/0 O 172.16.3.0 [110/2] via 172.16.0.1, 00:00:14, GigabitEthernet1/0 172.31.0.0/24 is subnetted, 1 subnets C 172.31.255.0 is directly connected, Loopback0 O 192.168.0.0/24 [110/2] via 172.16.0.1, 00:00:14, GigabitEthernet1/0 O 192.168.100.0/24 [110/3] via 172.16.0.1, 00:00:14, GigabitEthernet1/0 [110/3] via 172.16.1.2, 00:00:14, GigabitEthernet0/0 ```

Tabla de rutas obtenidas por OSPF#

Router-1# show ip route ospf 10.0.0.0/24 is subnetted, 2 subnets O 10.20.20.0 [110/2] via 172.16.1.2, 00:00:38, GigabitEthernet0/0 172.16.0.0/30 is subnetted, 4 subnets O 172.16.2.0 [110/2] via 172.16.1.2, 00:00:38, GigabitEthernet0/0 O 172.16.3.0 [110/2] via 172.16.0.1, 00:00:28, GigabitEthernet1/0 O 192.168.0.0 [110/2] via 172.16.0.1, 00:00:28, GigabitEthernet1/0 O 192.168.100.0 [110/3] via 172.16.0.1, 00:00:28, GigabitEthernet1/0 [110/3] via 172.16.1.2, 00:00:28, GigabitEthernet0/0

Información de OSPF#

Router-1# show ip ospf Routing Process "ospf 1" with ID 172.31.255.2 Supports only single TOS(TOS0) routes Supports opaque LSA SPF schedule delay 5 secs, Hold time between two SPFs 10 secs Minimum LSA interval 5 secs. Minimum LSA arrival 1 secs Number of external LSA 0. Checksum Sum 0x000000 Number of opaque AS LSA 0. Checksum Sum 0x000000 Number of DCbitless external and opaque AS LSA 0 Number of DoNotAge external and opaque AS LSA 0 Number of areas in this router is 1. 1 normal 0 stub 0 nssa External flood list length 0 Area BACKBONE(0) Number of interfaces in this area is 3 Area has no authentication SPF algorithm executed 3 times Area ranges are Number of LSA 8. Checksum Sum 0x04f163 Number of opaque link LSA 0. Checksum Sum 0x000000 Number of DCbitless LSA 0 Number of indication LSA 0 Number of DoNotAge LSA 0 Flood list length 0

Información detallada de interfaces con OSPF#

``` Router-1# show ip ospf interface

GigabitEthernet1/0 is up, line protocol is up Internet address is 172.16.0.2/30, Area 0 Process ID 1, Router ID 172.31.255.2, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State DR, Priority 1 Designated Router (ID) 172.31.255.2, Interface address 172.16.0.2 Backup Designated Router (ID) 172.31.255.1, Interface address 172.16.0.1 Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:03 Index 1/1, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 1, maximum is 1 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 1, Adjacent neighbor count is 1 Adjacent with neighbor 172.31.255.1 (Backup Designated Router) Suppress hello for 0 neighbor(s) GigabitEthernet2/0 is up, line protocol is up Internet address is 10.10.10.254/24, Area 0 Process ID 1, Router ID 172.31.255.2, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State DR, Priority 1 Designated Router (ID) 172.31.255.2, Interface address 10.10.10.254 No backup designated router on this network Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:03 Index 2/2, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 1, maximum is 1 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 0, Adjacent neighbor count is 0 Suppress hello for 0 neighbor(s) GigabitEthernet0/0 is up, line protocol is up Internet address is 172.16.1.1/30, Area 0 Process ID 1, Router ID 172.31.255.2, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State BDR, Priority 1 Designated Router (ID) 172.31.255.3, Interface address 172.16.1.2 Backup Designated Router (ID) 172.31.255.2, Interface address 172.16.1.1 Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:03 Index 3/3, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 1, maximum is 1 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 1, Adjacent neighbor count is 1 Adjacent with neighbor 172.31.255.3 (Designated Router) Suppress hello for 0 neighbor(s) ```

Tabla de vecinos de OSPF#

``` Router-1# show ip ospf neighbor

Neighbor ID Pri State Dead Time Address Interface 172.31.255.1 1 FULL/BDR 00:00:30 172.16.0.1 GigabitEthernet1/0 172.31.255.3 1 FULL/DR 00:00:31 172.16.1.2 GigabitEthernet0/0 ```

Detalle de vecinos OSPF#

Router-1# show ip ospf neighbor detail Neighbor 172.31.255.1, interface address 172.16.0.1 In the area 0 via interface GigabitEthernet1/0 Neighbor priority is 1, State is FULL, 5 state changes DR is 172.16.0.2 BDR is 172.16.0.1 Options is 0x00 Dead timer due in 00:00:36 Neighbor is up for 00:02:23 Index 1/1, retransmission queue length 0, number of retransmission 0 First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0) Last retransmission scan length is 0, maximum is 0 Last retransmission scan time is 0 msec, maximum is 0 msec Neighbor 172.31.255.3, interface address 172.16.1.2 In the area 0 via interface GigabitEthernet0/0 Neighbor priority is 1, State is FULL, 6 state changes DR is 172.16.1.2 BDR is 172.16.1.1 Options is 0x00 Dead timer due in 00:00:36 Neighbor is up for 00:02:23 Index 2/2, retransmission queue length 0, number of retransmission 0 First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0) Last retransmission scan length is 0, maximum is 0 Last retransmission scan time is 0 msec, maximum is 0 msec

Base de datos OSPF#

``` Router-1# show ip ospf database OSPF Router with ID (172.31.255.2) (Process ID 1)

            Router Link States (Area 0)

Link ID ADV Router Age Seq# Checksum Link count 172.31.255.4 172.31.255.4 110 0x80000006 0x007d41 3 172.31.255.2 172.31.255.2 110 0x80000006 0x000a6f 3 172.31.255.3 172.31.255.3 110 0x80000006 0x00d985 3 172.31.255.1 172.31.255.1 110 0x80000006 0x009c90 3

            Net Link States (Area 0)

Link ID ADV Router Age Seq# Checksum 172.16.1.2 172.31.255.3 115 0x80000001 0x00e1eb 172.16.2.2 172.31.255.4 115 0x80000001 0x00e0e8 172.16.3.1 172.31.255.4 110 0x80000002 0x00d1f8 172.16.0.2 172.31.255.2 110 0x80000001 0x005ed3 ```

Información de diagnóstico para Router-2#

Tabla de rutas#

``` Router-2# show ip route

Gateway of last resort is not set

 10.0.0.0/24 is subnetted, 2 subnets

O 10.10.10.0 [110/2] via 172.16.1.1, 00:10:38, GigabitEthernet1/0 C 10.20.20.0 is directly connected, GigabitEthernet2/0 172.16.0.0/30 is subnetted, 4 subnets O 172.16.0.0 [110/2] via 172.16.1.1, 00:10:38, GigabitEthernet1/0 C 172.16.1.0 is directly connected, GigabitEthernet1/0 C 172.16.2.0 is directly connected, GigabitEthernet0/0 O 172.16.3.0 [110/2] via 172.16.2.2, 00:10:38, GigabitEthernet0/0 172.31.0.0/24 is subnetted, 1 subnets C 172.31.255.0 is directly connected, Loopback0 O 192.168.0.0/24 [110/3] via 172.16.1.1, 00:10:28, GigabitEthernet1/0 [110/3] via 172.16.2.2, 00:10:28, GigabitEthernet0/0 O 192.168.100.0/24 [110/2] via 172.16.2.2, 00:10:38, GigabitEthernet0/0 ```

Tabla de rutas obtenidas por OSPF#

Router-2# show ip route ospf 10.0.0.0/24 is subnetted, 2 subnets O 10.10.10.0 [110/2] via 172.16.1.1, 00:10:43, GigabitEthernet1/0 172.16.0.0/30 is subnetted, 4 subnets O 172.16.0.0 [110/2] via 172.16.1.1, 00:10:43, GigabitEthernet1/0 O 172.16.3.0 [110/2] via 172.16.2.2, 00:10:43, GigabitEthernet0/0 O 192.168.0.0 [110/3] via 172.16.1.1, 00:10:33, GigabitEthernet1/0 [110/3] via 172.16.2.2, 00:10:33, GigabitEthernet0/0 O 192.168.100.0 [110/2] via 172.16.2.2, 00:10:43, GigabitEthernet0/0

Información de OSPF#

Router-2# show ip ospf Routing Process "ospf 1" with ID 172.31.255.3 Supports only single TOS(TOS0) routes Supports opaque LSA SPF schedule delay 5 secs, Hold time between two SPFs 10 secs Minimum LSA interval 5 secs. Minimum LSA arrival 1 secs Number of external LSA 0. Checksum Sum 0x000000 Number of opaque AS LSA 0. Checksum Sum 0x000000 Number of DCbitless external and opaque AS LSA 0 Number of DoNotAge external and opaque AS LSA 0 Number of areas in this router is 1. 1 normal 0 stub 0 nssa External flood list length 0 Area BACKBONE(0) Number of interfaces in this area is 3 Area has no authentication SPF algorithm executed 3 times Area ranges are Number of LSA 8. Checksum Sum 0x056de8 Number of opaque link LSA 0. Checksum Sum 0x000000 Number of DCbitless LSA 0 Number of indication LSA 0 Number of DoNotAge LSA 0 Flood list length 0

Información detallada de interfaces con OSPF#

``` Router-2# show ip ospf interface

GigabitEthernet2/0 is up, line protocol is up Internet address is 10.20.20.254/24, Area 0 Process ID 1, Router ID 172.31.255.3, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State DR, Priority 1 Designated Router (ID) 172.31.255.3, Interface address 10.20.20.254 No backup designated router on this network Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:07 Index 1/1, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 1, maximum is 1 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 0, Adjacent neighbor count is 0 Suppress hello for 0 neighbor(s) GigabitEthernet1/0 is up, line protocol is up Internet address is 172.16.1.2/30, Area 0 Process ID 1, Router ID 172.31.255.3, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State DR, Priority 1 Designated Router (ID) 172.31.255.3, Interface address 172.16.1.2 Backup Designated Router (ID) 172.31.255.2, Interface address 172.16.1.1 Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:07 Index 2/2, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 1, maximum is 1 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 1, Adjacent neighbor count is 1 Adjacent with neighbor 172.31.255.2 (Backup Designated Router) Suppress hello for 0 neighbor(s) GigabitEthernet0/0 is up, line protocol is up Internet address is 172.16.2.1/30, Area 0 Process ID 1, Router ID 172.31.255.3, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State BDR, Priority 1 Designated Router (ID) 172.31.255.4, Interface address 172.16.2.2 Backup Designated Router (ID) 172.31.255.3, Interface address 172.16.2.1 Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:07 Index 3/3, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 1, maximum is 1 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 1, Adjacent neighbor count is 1 Adjacent with neighbor 172.31.255.4 (Designated Router) Suppress hello for 0 neighbor(s) ```

Tabla de vecinos de OSPF#

``` Router-2# show ip ospf neighbor

Neighbor ID Pri State Dead Time Address Interface 172.31.255.4 1 FULL/DR 00:00:35 172.16.2.2 GigabitEthernet0/0 172.31.255.2 1 FULL/BDR 00:00:35 172.16.1.1 GigabitEthernet1/0 ```

Detalle de vecinos OSPF#

Router-2# show ip ospf neighbor detail Neighbor 172.31.255.4, interface address 172.16.2.2 In the area 0 via interface GigabitEthernet0/0 Neighbor priority is 1, State is FULL, 5 state changes DR is 172.16.2.2 BDR is 172.16.2.1 Options is 0x00 Dead timer due in 00:00:39 Neighbor is up for 00:12:08 Index 1/1, retransmission queue length 0, number of retransmission 0 First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0) Last retransmission scan length is 0, maximum is 0 Last retransmission scan time is 0 msec, maximum is 0 msec Neighbor 172.31.255.2, interface address 172.16.1.1 In the area 0 via interface GigabitEthernet1/0 Neighbor priority is 1, State is FULL, 6 state changes DR is 172.16.1.2 BDR is 172.16.1.1 Options is 0x00 Dead timer due in 00:00:39 Neighbor is up for 00:12:08 Index 2/2, retransmission queue length 0, number of retransmission 0 First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0) Last retransmission scan length is 0, maximum is 0 Last retransmission scan time is 0 msec, maximum is 0 msec

Base de datos OSPF#

``` Router-2# show ip ospf database OSPF Router with ID (172.31.255.3) (Process ID 1)

            Router Link States (Area 0)

Link ID ADV Router Age Seq# Checksum Link count 172.31.255.2 172.31.255.2 588 0x80000005 0x007802 3 172.31.255.3 172.31.255.3 588 0x80000005 0x0087d8 3 172.31.255.4 172.31.255.4 588 0x80000006 0x00dde0 3 172.31.255.1 172.31.255.1 588 0x80000006 0x009c90 3

            Net Link States (Area 0)

Link ID ADV Router Age Seq# Checksum 172.16.1.2 172.31.255.3 593 0x80000001 0x00e1eb 172.16.0.2 172.31.255.2 588 0x80000001 0x005ed3 172.16.3.1 172.31.255.4 588 0x80000001 0x00d3f7 172.16.2.2 172.31.255.4 588 0x80000002 0x00dee9 ```

Información de diagnóstico para Router-3#

Tabla de rutas#

``` Router-3# show ip route

Gateway of last resort is not set

 10.0.0.0/24 is subnetted, 2 subnets

O 10.10.10.0 [110/3] via 172.16.3.2, 00:12:09, GigabitEthernet0/0 [110/3] via 172.16.2.1, 00:12:09, GigabitEthernet1/0 O 10.20.20.0 [110/2] via 172.16.2.1, 00:12:09, GigabitEthernet1/0 172.16.0.0/30 is subnetted, 4 subnets O 172.16.0.0 [110/2] via 172.16.3.2, 00:12:09, GigabitEthernet0/0 O 172.16.1.0 [110/2] via 172.16.2.1, 00:12:09, GigabitEthernet1/0 C 172.16.2.0 is directly connected, GigabitEthernet1/0 C 172.16.3.0 is directly connected, GigabitEthernet0/0 172.31.0.0/24 is subnetted, 1 subnets C 172.31.255.0 is directly connected, Loopback0 O 192.168.0.0/24 [110/2] via 172.16.3.2, 00:12:09, GigabitEthernet0/0 C 192.168.100.0/24 is directly connected, GigabitEthernet2/0 ```

Tabla de rutas obtenidas por OSPF#

Router-3# show ip route ospf 10.0.0.0/24 is subnetted, 2 subnets O 10.10.10.0 [110/3] via 172.16.3.2, 00:12:22, GigabitEthernet0/0 [110/3] via 172.16.2.1, 00:12:22, GigabitEthernet1/0 O 10.20.20.0 [110/2] via 172.16.2.1, 00:12:22, GigabitEthernet1/0 172.16.0.0/30 is subnetted, 4 subnets O 172.16.0.0 [110/2] via 172.16.3.2, 00:12:22, GigabitEthernet0/0 O 172.16.1.0 [110/2] via 172.16.2.1, 00:12:22, GigabitEthernet1/0 O 192.168.0.0 [110/2] via 172.16.3.2, 00:12:22, GigabitEthernet0/0

Información de OSPF#

outer-3# show ip ospf Routing Process "ospf 1" with ID 172.31.255.4 Supports only single TOS(TOS0) routes Supports opaque LSA SPF schedule delay 5 secs, Hold time between two SPFs 10 secs Minimum LSA interval 5 secs. Minimum LSA arrival 1 secs Number of external LSA 0. Checksum Sum 0x000000 Number of opaque AS LSA 0. Checksum Sum 0x000000 Number of DCbitless external and opaque AS LSA 0 Number of DoNotAge external and opaque AS LSA 0 Number of areas in this router is 1. 1 normal 0 stub 0 nssa External flood list length 0 Area BACKBONE(0) Number of interfaces in this area is 3 Area has no authentication SPF algorithm executed 6 times Area ranges are Number of LSA 8. Checksum Sum 0x04d173 Number of opaque link LSA 0. Checksum Sum 0x000000 Number of DCbitless LSA 0 Number of indication LSA 0 Number of DoNotAge LSA 0 Flood list length 0

Información detallada de interfaces con OSPF#

``` Router-3# show ip ospf interface

GigabitEthernet0/0 is up, line protocol is up Internet address is 172.16.3.1/30, Area 0 Process ID 1, Router ID 172.31.255.4, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State DR, Priority 1 Designated Router (ID) 172.31.255.4, Interface address 172.16.3.1 Backup Designated Router (ID) 172.31.255.1, Interface address 172.16.3.2 Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:09 Index 1/1, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 1, maximum is 1 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 1, Adjacent neighbor count is 1 Adjacent with neighbor 172.31.255.1 (Backup Designated Router) Suppress hello for 0 neighbor(s) GigabitEthernet2/0 is up, line protocol is up Internet address is 192.168.100.254/24, Area 0 Process ID 1, Router ID 172.31.255.4, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State DR, Priority 1 Designated Router (ID) 172.31.255.4, Interface address 192.168.100.254 No backup designated router on this network Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:09 Index 2/2, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 1, maximum is 1 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 0, Adjacent neighbor count is 0 Suppress hello for 0 neighbor(s) GigabitEthernet1/0 is up, line protocol is up Internet address is 172.16.2.2/30, Area 0 Process ID 1, Router ID 172.31.255.4, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State DR, Priority 1 Designated Router (ID) 172.31.255.4, Interface address 172.16.2.2 Backup Designated Router (ID) 172.31.255.3, Interface address 172.16.2.1 Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:09 Index 3/3, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 1, maximum is 1 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 1, Adjacent neighbor count is 1 Adjacent with neighbor 172.31.255.3 (Backup Designated Router) Suppress hello for 0 neighbor(s) ```

Tabla de vecinos de OSPF#

``` Router-3# show ip ospf neighbor

Neighbor ID Pri State Dead Time Address Interface 172.31.255.3 1 FULL/BDR 00:00:30 172.16.2.1 GigabitEthernet1/0 172.31.255.1 1 FULL/BDR 00:00:30 172.16.3.2 GigabitEthernet0/0 ```

Detalle de vecinos OSPF#

Router-3# show ip ospf neighbor detail Neighbor 172.31.255.3, interface address 172.16.2.1 In the area 0 via interface GigabitEthernet1/0 Neighbor priority is 1, State is FULL, 5 state changes DR is 172.16.2.2 BDR is 172.16.2.1 Options is 0x00 Dead timer due in 00:00:34 Neighbor is up for 00:13:33 Index 1/1, retransmission queue length 0, number of retransmission 0 First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0) Last retransmission scan length is 0, maximum is 1 Last retransmission scan time is 0 msec, maximum is 0 msec Neighbor 172.31.255.1, interface address 172.16.3.2 In the area 0 via interface GigabitEthernet0/0 Neighbor priority is 1, State is FULL, 6 state changes DR is 172.16.3.1 BDR is 172.16.3.2 Options is 0x00 Dead timer due in 00:00:34 Neighbor is up for 00:13:33 Index 2/2, retransmission queue length 0, number of retransmission 0 First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0) Last retransmission scan length is 0, maximum is 0 Last retransmission scan time is 0 msec, maximum is 0 msec

Base de datos OSPF#

``` Router-3# show ip ospf database OSPF Router with ID (172.31.255.4) (Process ID 1)

            Router Link States (Area 0)

Link ID ADV Router Age Seq# Checksum Link count 172.31.255.2 172.31.255.2 661 0x80000005 0x007802 3 172.31.255.1 172.31.255.1 661 0x80000006 0x009c90 3 172.31.255.4 172.31.255.4 661 0x80000006 0x00dde0 3 172.31.255.3 172.31.255.3 661 0x80000005 0x0087d8 3

            Net Link States (Area 0)

Link ID ADV Router Age Seq# Checksum 172.16.1.2 172.31.255.3 666 0x80000001 0x00e1eb 172.16.0.2 172.31.255.2 661 0x80000001 0x005ed3 172.16.3.1 172.31.255.4 661 0x80000001 0x00d3f7 172.16.2.2 172.31.255.4 661 0x80000002 0x00dee9 ```

Referencias#