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#