RUTA FLOTANTE




Una ruta estática flotante es una ruta de respaldo a una ruta principal, descubierta ya sea por routing dinámico, o asignado mediante routing estático, dicha ruta flotante debe configurarse con una distancia administrativa mayor que la ruta principal.
Objetivos: Desarrollaremos la configuración sobre el direccionamiento y enrutamiento estático, además mostraremos los cambios que se hacen al simular una falla en una interface de R-R.

CONFIGURACIÓN ROUTER R-R
R-R(config)#Interface FastEthernet0/0
R-R(config-if)#ip address 192.168.1.33 255.255.255.224
R-R(config-if)#no shutdown
R-R(config)#Interface FastEthernet1/0
R-R(config-if)#ip address 192.168.1.65 255.255.255.224
R-R(config-if)#no shutdown
R-R(config)#Interface serial2/0
R-R(config-if)#ip address 10.0.0.1 255.255.255.252
R-R(config-if)#no shutdown
R-R(config)#Interface serial3/0
R-R(config-if)#ip address 40.0.0.1 255.255.255.252
R-R(config-if)#no shutdown
R-R(config-if)#exit
R-R(config)# ip route 0.0.0.0 0.0.0.0 10.0.0.2
R-R(config)#ip route 0.0.0.0 0.0.0.0 40.0.0.2 5

MOSTRANDO TABLAS DE ENRUTAMIENTO SIN DESACTIVAR NINGUNA INTERFACE
R-R#show ip route
Gateway of last resort is 10.0.0.2 to network 0.0.0.0
     10.0.0.0/30 is subnetted, 1 subnets
C       10.0.0.0 is directly connected, Serial2/0
     40.0.0.0/30 is subnetted, 1 subnets
C       40.0.0.0 is directly connected, Serial3/0
     192.168.1.0/27 is subnetted, 2 subnets
C       192.168.1.32 is directly connected, FastEthernet0/0
C       192.168.1.64 is directly connected, FastEthernet1/0
S*   0.0.0.0/0 [1/0] via 10.0.0.2

DESACTIVANDO LA INTERFACE SERIAL 2/0 Y MOSTRANDO TABLAS DE ENRUTAMIENTO
R-R(config)#int s2/0
R-R(config-if)#shutdown
%LINK-5-CHANGED: Interface Serial2/0, changed state to administratively down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial2/0, changed state to down
R-R(config-if)#do show ip route
Gateway of last resort is 40.0.0.2 to network 0.0.0.0
     40.0.0.0/30 is subnetted, 1 subnets
C       40.0.0.0 is directly connected, Serial3/0
     192.168.1.0/27 is subnetted, 2 subnets
C       192.168.1.32 is directly connected, FastEthernet0/0
C       192.168.1.64 is directly connected, FastEthernet1/0
S*   0.0.0.0/0 [5/0] via 40.0.0.2

CONFIGURACIÓN ROUTER R-C
R-C(config)#Interface FastEthernet0/0
R-C(config-if)#ip address 192.168.1.1 255.255.255.224
R-C(config-if)#no shutdown
R-C(config)#Interface serial2/0
R-C(config-if)# ip address 50.0.0.1 255.255.255.252
R-C(config-if)#no shutdown
R-C(config)#Interface serial3/0
R-C(config-if)# ip address 10.0.0.2 255.255.255.252
R-C(config-if)#no shutdown
R-C(config-if)#exit
R-C(config)# ip route 40.0.0.0 255.255.255.252 50.0.0.2
R-C(config)#ip route 192.168.1.32 255.255.255.224 10.0.0.1
R-C(config)#ip route 192.168.1.64 255.255.255.224 10.0.0.1
R-C(config)#ip route 192.168.1.32 255.255.255.224 50.0.0.2 5
R-C(config)#ip route 192.168.1.64 255.255.255.224 50.0.0.2 5

MOSTRANDO TABLAS DE ENRUTAMIENTO SIN DESACTIVAR NINGUNA INTERFACE
R-C#show ip route
Gateway of last resort is not set
     10.0.0.0/30 is subnetted, 1 subnets
C       10.0.0.0 is directly connected, Serial3/0
     40.0.0.0/30 is subnetted, 1 subnets
S       40.0.0.0 [1/0] via 50.0.0.2
     50.0.0.0/30 is subnetted, 1 subnets
C       50.0.0.0 is directly connected, Serial2/0
     192.168.1.0/27 is subnetted, 3 subnets
C       192.168.1.0 is directly connected, FastEthernet0/0
S       192.168.1.32 [1/0] via 10.0.0.1
S       192.168.1.64 [1/0] via 10.0.0.1

MOSTRANDO LA TABLA DE ENRUTAMIENTO AL DESATIVAR LA INTERFACE SERIAL 2/0 DEL R-R
R-C#show ip route
Gateway of last resort is not set
     40.0.0.0/30 is subnetted, 1 subnets
S       40.0.0.0 [1/0] via 50.0.0.2
     50.0.0.0/30 is subnetted, 1 subnets
C       50.0.0.0 is directly connected, Serial2/0
     192.168.1.0/27 is subnetted, 3 subnets
C       192.168.1.0 is directly connected, FastEthernet0/0
S       192.168.1.32 [5/0] via 50.0.0.2
S       192.168.1.64 [5/0] via 50.0.0.2

CONFIGURACIÓN ROUTER R-F
R-F(config)#Interface serial2/0
R-F(config-if)#ip address 50.0.0.2 255.255.255.252
R-F(config-if)#no shutdown
R-F(config)#Interface serial3/0
R-F(config-if)#ip address 40.0.0.2 255.255.255.252
R-F(config-if)#no shutdown
R-F(config-if)#exit
R-F(config)#ip route 192.168.1.32 255.255.255.224 40.0.0.1
R-F(config)#ip route 192.168.1.0 255.255.255.224 50.0.0.1
R-F(config)#ip route 192.168.1.64 255.255.255.224 40.0.0.1

MOSTRANDO TABLAS DE ENRUTAMIENTO (Este router no queda afectado por nada al desactivarse la interface serial 2/0 de R-R)
R-F#show ip route
Gateway of last resort is not set
     40.0.0.0/30 is subnetted, 1 subnets
C       40.0.0.0 is directly connected, Serial3/0
     50.0.0.0/30 is subnetted, 1 subnets
C       50.0.0.0 is directly connected, Serial2/0
     192.168.1.0/27 is subnetted, 3 subnets
S       192.168.1.0 [1/0] via 50.0.0.1
S       192.168.1.32 [1/0] via 40.0.0.1
S       192.168.1.64 [1/0] via 40.0.0.1

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