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
- Equipos directamente conectados
- Redes intermedias de interconexión
- 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#
- https://www.cisco.com/c/en/us/td/docs/ios/
- https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_ospf/command/iro-cr-book/ospf-s1.html
- https://www.computernetworkingnotes.com/ccna-study-guide/ospf-fundamental-terminology-explained.html
- https://www.computernetworkingnotes.com/ccna-study-guide/ospf-neighborship-condition-and-requirement.html
- https://www.computernetworkingnotes.com/ccna-study-guide/ospf-neighbor-states-explained-with-example.html
- https://www.computernetworkingnotes.com/ccna-study-guide/ospf-configuration-step-by-step-guide.html
- https://www.computernetworkingnotes.com/ccna-study-guide/ospf-metric-cost-calculation-formula-explained.html