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• marcos araneda

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Enrutamiento en demanda ODR

SE REALIZA UN SHOW IP ROUTE PARA VERIFICAR QUE ROUTER TIENE AGREGADAS AL R1

LUEGO APLICAREMOS EN EN R2 EL SIGUIENTE COMANDO R2(config)#router odr Y TAMBIEN EN EL R1 R1(config)#router odr REALIZAMOS NUEVAMENTE EL COMANDO SHOW IP ROUTE EN EL R1

AHORA APLICAREMOS A LOS ROUTER RESTANTES EL MISMO COMANDO EN R1 Y R2 R3(config)#router odr

R4(config)#router odr REALIZAMOS NUEVAMENTE EL COMANDO SHOW IP ROUTE EN EL R1

Nota:en algunos routers soo es necesario hacerlo en el router central, ya que en los otros routers si seles aplica el comando lo rechaza.

Enrutamiento Protocolos Classful

R1(config)#no ip classless R1(config)#interface fastEthernet 0/1 R1(config-if)#ip address 10.0.0.1 255.255.255.252 R1(config-if)#no shutdown R1(config-if)#exit R1(config)#interface fastEthernet 0/0 R1(config-if)#ip address 192.168.1.1 255.255.255.128 R1(config-if)#no shutdown R1(config-if)#exit

R1(config)#router rip R1(config-router)#network 192.168.1.0 R1(config-router)#network 10.0.0.0 R2(config)#no ip classless R2(config)#interface fastEthernet 0/1 R2(config-if)#ip address 10.0.0.2 255.255.255.252 R2(config-if)#no shutdown R2(config-if)#exit R2(config)#interface fastEthernet 0/0 R2(config-if)#ip address 192.168.1.129 255.255.255.128 R2(config-if)#no shutdown R2(config-if)#exit R2(config)#router rip R2(config-router)#network 10.0.0.0 R2(config-router)#network 191.128.1.128 Nota: si no funciona agregar la versión 2 y escribir el comando ip classess Para verificar rutas no olvidar el comando R1# show ip route

Classless routing y no auto summary

RIP

Router0#debug ip rip RIP protocol debugging is on Router0(config)#router rip Router0(config-router)#network 192.168.1.0 Router0(config-router)#RIP: sending v1 request to 255.255.255.255 via FastEthernet0/0 (192.168.1.1)

Router0(config-router)#network 10.0.0.0 Router0(config-router)#RIP: sending v1 request to 255.255.255.255 via FastEthernet0/1 (10.0.0.1) RIP: sending v1 update to 255.255.255.255 via FastEthernet0/0 (192.168.1.1) RIP: build update entries network 10.0.0.0 metric 1 RIP: sending v1 update to 255.255.255.255 via FastEthernet0/1 (10.0.0.1) RIP: build update entries network 192.168.1.0 metric 1 Router1#debug ip rip RIP protocol debugging is on Router1#conf t Router1(config)#router rip Router1(config-router)#network 192.168.1.128 Router1(config-router)#RIP: sending v1 request to 255.255.255.255 via FastEthernet0/0 (192.168.1.129) Router1(config-router)#network 10.0.0.0 Router1(config-router)#RIP: sending v1 request to 255.255.255.255 via FastEthernet0/1 (10.0.0.2) RIP: sending v1 update to 255.255.255.255 via FastEthernet0/0 (192.168.1.129) RIP: build update entries network 10.0.0.0 metric 1 RIP: sending v1 update to 255.255.255.255 via FastEthernet0/1 (10.0.0.2) RIP: build update entries network 192.168.1.0 metric 1 Router1(config-router)#RIP: sending v1 update to 255.255.255.255 via FastEthernet0/0 (192.168.1.129) RIP: build update entries network 10.0.0.0 metric 1 RIP: sending v1 update to 255.255.255.255 via FastEthernet0/1 (10.0.0.2) RIP: build update entries network 192.168.1.0 metric 1 Router1(config-router)#RIP: received v1 update from 10.0.0.1 on FastEthernet0/1 192.168.1.0 in 1 hops Router1(config-router)#RIP: sending v1 update to 255.255.255.255 via FastEthernet0/0 (192.168.1.129)

RIP: build update entries network 10.0.0.0 metric 1 RIP: sending v1 update to 255.255.255.255 via FastEthernet0/1 (10.0.0.2) RIP: build update entries network 192.168.1.0 metric 1 Router1(config-router)#RIP: received v1 update from 10.0.0.1 on FastEthernet0/1 192.168.1.0 in 1 hops

RIP V2

Router2#debug ip rip RIP protocol debugging is on

Router2(config)#router rip Router2(config-router)#version 2 Router2(config-router)#network 192.168.1.0 Router2(config-router)#RIP: sending v2 request to 224.0.0.9 via FastEthernet0/0 (192.168.1.1)

Router2(config-router)#network 10.0.0.0 Router2(config-router)#RIP: sending v2 request to 224.0.0.9 via FastEthernet0/1 (10.0.0.1)

RIP: sending v2 update to 224.0.0.9 via FastEthernet0/0 (192.168.1.1) RIP: build update entries

10.0.0.0/8 via 0.0.0.0, metric 1, tag 0

RIP: sending v2 update to 224.0.0.9 via FastEthernet0/1 (10.0.0.1) RIP: build update entries 192.168.1.0/24 via 0.0.0.0, metric 1, tag 0

Router3#debug ip rip RIP protocol debugging is on Router3(config-router)#version 2 Router3(config-router)#network 192.168.1.128 Router3(config-router)#RIP: sending v2 request to 224.0.0.9 via FastEthernet0/0 (192.168.1.129) Router3(config-router)#network 10.0.0.0 Router3(config-router)#RIP: sending v2 request to 224.0.0.9 via FastEthernet0/1 (10.0.0.2) RIP: sending v2 update to 224.0.0.9 via FastEthernet0/0 (192.168.1.129) RIP: build update entries 10.0.0.0/8 via 0.0.0.0, metric 1, tag 0 RIP: sending v2 update to 224.0.0.9 via FastEthernet0/1 (10.0.0.2) RIP: build update entries 192.168.1.0/24 via 0.0.0.0, metric 1, tag 0 Rip versión 1

Rip versión 2

Tabla de rutas y ruta de respaldo se configura normal mente

R1(config)#ip route 0.0.0.0 0.0.0.0 fastEthernet 1/0 R1(config)#ip route 0.0.0.0 0.0.0.0 fastEthernet 1/1 se le da la prioridad con el numero 2 al final de la ruta

R1(config)#no ip route 0.0.0.0 0.0.0.0 fastEthernet 1/0 R1(config)#ip route 0.0.0.0 0.0.0.0 fastEthernet 1/0 2

Protocolo EIGRP Métrica

R3#show ip route eigrp

R3#show interfaces fastEthernet 0/1

Formula calculo de métrica según este ejemplo o ejercicio 10^7/100000=100 100x3 /10=30 256(100+30)=33280 Modificamos el bandwidth del R3 para el nuevo calculo R3(config)#interface fastEthernet 0/1 R3(config-if)#bandwidth 1000

10^7/1000=10000 100x3 /10=30 256(10000+30)=2567680 R3#show ip route eigrp nuevamente

R3#show interfaces fastEthernet 0/1 nuevamente

Algoritmo DUAL y balanceo de carga

Con este comando desactivamos la interfas tendrá igual conectividad pero no recibirá actualizaciones

R3(config)#router eigrp 1 R3(config-router)#passive-interface fastEthernet 0/0

Con este comando balancea la distribución por igual rutas

R3(config)#router eigrp 1 R3(config-router)#variance 10 R3#show ip route eigrp

De donde sale el 10 con el comando variance

Tabla de vecindad y sumarizacion

R3#show ip eigrp neighbors

172.16.0.0 = 10101100.00010000.00000000.00000000 172.17.0.0 = 10101100.00010001.00000000.00000000 172.18.0.0 = 10101100.00010010.00000000.00000000 172.19.0.0 = 10101100.00010011.00000000.00000000 255.252.0.0 =14

Sumarizacion: El primer paso es enumerar las redes en formato binario. La figura muestra las cuatro redes en formato binario. Segundo paso, hay que contar el número de bits coincidentes desde el extremo izquierdo para determinar la máscara para la ruta sumarizada. Puede ver en la figura que coinciden los primeros 14 bits coincidentes que se encuentran más a la izquierda. Éste es el prefijo o máscara de subred para la ruta sumarizada: /14 ó 255.252.0.0. El tercer paso es copiar los bits coincidentes y luego agregar bits cero para determinar la dirección de red sumarizada. La figura muestra que los bits coincidentes con ceros al final producen la dirección de red 172.20.0.0. Las cuatro redes (172.20.0.0/16, 172.21.0.0/16, 172.22.0.0/16 y 172.23.0.0/16) pueden sumarizar en una única dirección de red y prefijo 172.20.0.0/14.

R1(config)#interface loopback 0 R1(config-if)#ip address 172.16.0.1 255.255.0.0 R1(config-if)#interface loopback 1 R1(config-if)#ip address 172.17.0.1 255.255.0.0 R1(config-if)#interface loopback 2 R1(config-if)#ip address 172.18.0.1 255.255.0.0 R1(config-if)#interface loopback 3 R1(config-if)#ip address 172.19.0.1 255.255.0.0 R1(config)#router eigrp 1 R1(config-router)#no auto-summary

R1(config)#interface fastEthernet 1/0 R1(config-if)#ip summary-address eigrp 1 172.16.0.0 255.252.0.0 R1(config-if)#exit R1(config)#interface fastEthernet 1/1 R1(config-if)#ip summary-address eigrp 1 172.16.0.0 255.252.0.0 R1(config-if)#exit R1(config)#router eigrp 1 R1(config-router)#network 172.16.0.0 0.3.255.255 R1#show ip route

R1#show ip route eigrp

Comprobamos con un ping de un extremo de la topología para verificar si llegamps a la loopback

Tabla de topología y router stub

Con el comando que ingresemos limitara la iformacion a los otros routers, osea no muestra las rutas conectadas por el protocolo

R1(config)#router eigrp 1 R1(config-router)#eigrp stub receive-only

Nuevamente ingresamos el comoando para verificar si ahora muestra las rutas o no

Tabla de enrutamiento y autenticación

R3(config)#interface fastEthernet 0/1 R3(config-if)#ip authentication mode eigrp 1 md5

R3(config-if)#ip authentication key-chain eigrp 1 marcos R3(config-if)#exit R3(config)#key chain marcos R3(config-keychain)#key ? Key identifier R3(config-keychain)#key 1 R3(config-keychain-key)#key-string marcosaraneda R3(config-keychain-key)#exit R3(config-keychain)#exit R3(config)#

R3(config)#interface fastEthernet 1/0 R3(config-if)#ip authentication mode eigrp 1 md5 R3(config-if)#ip authentication key-chain eigrp 1 marcos Ahora realizamos un ping para verificar que realmente no llegamos

Se aplica a todos los router involucrados los mismos comando en las interfaces y volvemos a realizar un ping

EIGRP Diseño de red y optimización

Se dejan las interfasce q no necesitan actualizaciones

R3(config)#router eigrp 1 R3(config-router)#passive-interface fastEthernet 0/0

R2(config)#router eigrp 1 R2(config-router)#passive-interface fastEthernet 0/0

R2(config)#interface fastEthernet 0/1 R2(config-if)#ip hold-time eigrp 1 30 (Configurar temporizador de inactividad) R2(config-if)#ip hello-interval eigrp 1 10 (Configurar temporizador de hello y actualizaciones ) R2#show ip eigrp 1 interfaces detail fastEthernet 0/1

EIGRP Verificación

R3#show ip eigrp interfaces

R3#show ip eigrp neighbors

R3#show ip eigrp topology

R3#show ip eigrp traffic

OSPF Funcionamiento y métrica

Con este comando eligira la ruta inferior ya que a mayor costo elile la ruta por donde irse

R0(config)#interface fastEthernet 0/1 R0(config-if)#ip ospf cost 5

R2#show ip route ospf 10.0.0.0/30 is subnetted, 1 subnets O 10.0.0.0 [110/2] via 12.0.0.1, 00:01:51, FastEthernet1/0

11.0.0.0/30 is subnetted, 1 subnets O 11.0.0.0 [110/2] via 13.0.0.1, 00:52:56, FastEthernet1/1 O 192.168.1.0 [110/2] via 12.0.0.1, 00:54:44, FastEthernet1/0 O 192.168.2.0 [110/2] via 13.0.0.1, 00:52:39, FastEthernet1/1

R2(config)#router ospf 1 R2(config-router)#auto-cost reference-bandwidth 1000

R2#show ip route ospf

10.0.0.0/30 is subnetted, 1 subnets O 10.0.0.0 [110/11] via 12.0.0.1, 00:00:20, FastEthernet1/0 11.0.0.0/30 is subnetted, 1 subnets O 11.0.0.0 [110/11] via 13.0.0.1, 00:00:20, FastEthernet1/1 O 192.168.1.0 [110/11] via 12.0.0.1, 00:00:20, FastEthernet1/0 O 192.168.2.0 [110/11] via 13.0.0.1, 00:00:20, FastEthernet1/1

Podemos modificar también la prioridad de un router con el comando “ip ospf priority number”, donde “number” es un número entre 1 y 255. Prioridad 0 implica que el router no puede ser elegido DR o BDR, el valor por defecto es 1 y a mayor valor el router es elegido como DR o BDR. La métrica por defecto usada en OSPF es el ancho de banda. En un router CISCO el coste de un enlace se calcula como 108 ¸bandwidth (bps). Por ejemplo si tenemos un enlace Ethernet a 10 Mbps el coste sería 108¸107=10, mientras que un modem a 56 Kbps tendria un coste de 108¸56*103 =1785. El SPF es un algoritmo de mínimo coste. Podemos modificar el coste de un enlace de dos maneras: (1) modificando el valor del coste en la interfaz de ese enlace con el comando “ip ospf cost” donde cost tiene un valor entre 1 y 65535 o (2) modificando el valor del bandwidth en la interfaz que permite calcular el coste con el comando “bandwidth value”. Fijaros que NO estáis cambiando la velocidad real del enlace, solo el coste de cara a calcular el camino más corto.

Se pueden cambiar los valores de periodicidad de los temporizadores de paquetes Hello: hello-interval (tiempo entre paquetes hello, por defecto es 10 s) y dead-interval (tiempo que considera que el enlace ha caído, por defecto es 40 s). Los temporizadores se modifican por interfaz con los comandos “ip ospf hello-interval value” y “ip ospf dead-interval value”

RA(config)# interface loopback 0 RA(config-if)# ip address 172.5.5.2 255.255.255.0 RA(config-if)# exit RA(config)# interface s0 RA(config-if)# bandwidth 2048000 ‡ 2,048 Mbps RA(config-if)# ip ospf cost 488 ‡ equivalente al comando anterior RA(config-if)# ip ospf hello-interval 30 RA(config-if)# ip ospf dead-interval 120

OSPF Componentes e interface pasiva

Ingresamos las interfaces Loopback al R1 Luego agregamos la ruta por defecto a Ospf 1 area 0 R1(config)#router ospf 1 R1(config-router)#network 0.0.0.0 255.255.255.255 area 0 Ahora verificaremos en otro router cualquiera si las redes fueron publicadas a los demás por ejemplo nos vamos al R0 R0#show ip route ospf

Si yo elimino la ruta por defecto no estarán las ruta 172 pero la ingreso en forma manual y en forma de rango como 172.16.0.0 con su wilcard y saldrán de igual forma todas las rutas del rango 172 R1(config-router)#no network 0.0.0.0 255.255.255.255 area 0 R1(config-router)#do sh run

router ospf 1 log-adjacency-changes network 10.0.0.0 0.0.0.3 area 0 network 11.0.0.0 0.0.0.3 area 0 R1(config-router)#network 172.16.0.0 0.0.255.255 area 0 R1(config-router)#do sh run

router ospf 1 log-adjacency-changes network 10.0.0.0 0.0.0.3 area 0 network 11.0.0.0 0.0.0.3 area 0 network 172.16.0.0 0.0.255.255 area 0 Veamos en otro router si aparece R3#show ip route ospf

OSPF Router designado DR y BDR

R0#show ip ospf neighbor

Empesamos R0(config)#interface fastEthernet 0/1 R0(config-if)#ip ospf priority 0 R0(config-if)#interface fastEthernet 1/0 R0(config-if)#ip ospf priority 0 R0(config-if)#interface fastEthernet 0/0 R0(config-if)#ip ospf priority 0 R0(config-if)#exit R0(config)#interface loopback 0 R0(config-if)#ip address 1.1.1.1 255.255.255.255 R0(config-if)# R1(config)#interface fastEthernet 0/1 R1(config-if)#ip ospf priority 0 R1(config-if)#interface fastEthernet 1/1 R1(config-if)#ip ospf priority 0 R1(config-if)#interface fastEthernet 0/0 R1(config-if)#ip ospf priority 0 R1(config-if)#exit R1(config)#interface loopback 0 R1(config-if)#ip address 2.2.2.2 255.255.255.255 R1(config-if)# R3(config)#interface loopback 0 R3(config-if)#ip address 3.3.3.3 255.255.255.255 R2(config)#interface loopback 0 R2(config-if)#ip address 4.4.4.4 255.255.255.255 R0#show ip ospf neighbor

R0#clear ip ospf process Reset ALL OSPF processes? [no]: yes

Esto es en caso de que tengamos duda de quien tiene el estado de DR o DROTHER

OSPF Paquetes y autenticación

R0(config)#interface fastEthernet 0/1 R0(config-if)#ip ospf authentication-key marcos R0(config-if)#ip ospf authentication R0(config-if)#exit R0(config)#router ospf 1 R0(config-router)#area 0 authentication

R1(config)#interface fastEthernet 0/1 R1(config-if)#ip ospf authentication-key marcos R1(config-if)#ip ospf authentication ________________________________________________

R0(config)#interface fastEthernet 1/0 R0(config-if)#ip ospf authentication message-digest R0(config-if)#ip ospf message-digest-key ?

Key ID R0(config-if)#ip ospf message-digest-key 1 md5 marcos R0(config-if)#exit R0(config)#router ospf 1 R0(config-router)#area 0 authentication message-digest R2(config)#interface fastEthernet 1/0 R2(config-if)#ip ospf authentication message-digest R2(config-if)#ip ospf message-digest-key 1 md5 marcos R2(config-if)#exit R2(config)#router ospf 1 R2(config-router)#area 0 authentication message-digest

OSPF Topologías NBMA y ajustes OSPF WAN Frame Relay punto a punto con subinterfaces

Router1# interface FastEthernet0/0 ip address 192.168.3.1 255.255.255.0 interface Serial0/3/0 encapsulation frame-relay no shutdown

interface Serial0/3/0.301 point-to-point

ip address 11.0.0.2 255.255.255.252 frame-relay interface-dlci 301 interface Serial0/3/0.302 point-to-point ip address 12.0.0.2 255.255.255.252 frame-relay interface-dlci 302 router ospf 1 log-adjacency-changes network 10.0.0.0 0.0.0.255 area 0 network 11.0.0.0 0.0.0.255 area 0 network 12.0.0.0 0.0.0.255 area 0 ip route 192.168.1.0 255.255.255.0 11.0.0.1 ip route 192.168.2.0 255.255.255.0 12.0.0.1 Router0# interface FastEthernet0/0 ip address 192.168.1.1 255.255.255.0 interface Serial0/3/0 no shutdown encapsulation frame-relay interface Serial0/3/0.102 point-to-point ip address 10.0.0.1 255.255.255.252 frame-relay interface-dlci 102 interface Serial0/3/0.103 point-to-point ip address 11.0.0.1 255.255.255.252 frame-relay interface-dlci 103 router ospf 1 network 10.0.0.0 0.0.0.255 area 0 network 11.0.0.0 0.0.0.255 area 0 network 12.0.0.0 0.0.0.255 area 0 ip route 192.168.2.0 255.255.255.0 10.0.0.2 ip route 192.168.3.0 255.255.255.0 11.0.0.2 Router2# interface FastEthernet0/0 ip address 192.168.2.1 255.255.255.0

interface Serial0/3/0 no shutdown encapsulation frame-relay interface Serial0/3/0.201 point-to-point ip address 10.0.0.2 255.255.255.252 frame-relay interface-dlci 201 interface Serial0/3/0.203 point-to-point ip address 12.0.0.1 255.255.255.252 frame-relay interface-dlci 203 router ospf 1 network 10.0.0.0 0.0.0.255 area 0 network 11.0.0.0 0.0.0.255 area 0 network 12.0.0.0 0.0.0.255 area 0 ip route 192.168.1.0 255.255.255.0 10.0.0.1 ip route 192.168.3.0 255.255.255.0 12.0.0.2

OSPF Múltiples áreas y función

Nota: solo se conectaran con ping todos aquellos routers unidos allos router centrales por backbone, osea los que están detrás del triangulo de routers, no aquellos q los q serán a anteriores de los router perimetrales

OSPF Múltiples áreas Procesos y enlaces virtuales

OSPF Múltiples áreas Diseño y sumarización

Se crean rutas para el ejemplo Router0(config)#interface loopback 0 Router0(config-if)#ip address 172.16.0.1 255.255.0.0 Router0(config)#interface loopback 1 Router0(config-if)#ip address 172.17.0.1 255.255.0.0 Router0(config)#interface loopback 2 Router0(config-if)#ip address 172.18.0.1 255.255.0.0 Router0(config)#interface loopback 3 Router0(config-if)#ip address 172.19.0.1 255.255.0.0 Configuracion Router0(config)#router ospf 1 Router0(config-router)#network 172.16.0.0 0.0.255.255 area 0 Router0(config-router)#network 172.17.0.0 0.0.255.255 area 0 Router0(config-router)#network 172.18.0.0 0.0.255.255 area 0 Router0(config-router)#network 172.19.0.0 0.0.255.255 area 0 Con este comando sumariza las rutas Router0(config-router)#area 0 range 172.16.0.0 255.252.0.0 Router0#show ip ospf database

Configuracion para acelerar los router con simples comandos Router4(config)#router ospf 1 Router4(config-router)#area 1 stub Router1(config)#router ospf 1 Router1(config-router)#area 1 stub

Router1#show ip ospf database

Router2(config)#router ospf 1 Router2(config-router)#area 3 stub Router5(config)#router ospf 1 Router5(config-router)#area 3 stub

IS IS Introducción y configuración básica

R1(config)#interface fastEthernet 0/0 R1(config-if)#ip address 10.0.0.1 255.255.255.252 R1(config-if)#no shutdown R1(config-if)#ip router isis R1(config-if)#exit R1(config)#router isis R1(config-router)#net 49.0001.0000.0000.1111.00 R2(config)#interface fastEthernet 0/0 R2(config-if)#ip address 10.0.0.2 255.255.255.252 R2(config-if)#no shutdown R2(config-if)#ip router isis R2(config-if)#exit R2(config)#interface fastEthernet 1/0 R2(config-if)#ip address 11.0.0.1 255.255.255.252 R2(config-if)#no shutdown R2(config-if)#ip router isis R2(config-if)#exit R2(config)#router isis R2(config-router)#net 49.0001.0000.0000.2222.00 R3(config)#interface fastEthernet 1/0 R3(config-if)#ip address 11.0.0.2 255.255.255.252 R3(config-if)#no shutdown R3(config-if)#ip router isis R3(config-if)#exit R3(config)#router isis R3(config-router)#net 49.0001.0000.0000.3333.00

IS IS Componentes y DIS

dis(config)#interface fastEthernet 1/0 dis(config-if)#isis priority 65 dis#show isis neighbors

nodis2(config)#interface fastEthernet 0/0 nodis2(config-if)#isis priority 66 nodis2#show isis neighbors

IS IS Direccionamiento OSI

R1(config)#interface fastEthernet 0/0 R1(config-if)#ip address 10.0.0.1 255.255.255.252 R1(config-if)#no shutdown R1(config-if)#ip router isis R1(config-if)#exit R1(config)#router isis R1(config-router)#net 49.0001.0000.0000.1111.00 R1(config-router)#is-type level-1 R2(config)#interface fastEthernet 0/0 R2(config-if)#ip address 10.0.0.2 255.255.255.252 R2(config-if)#no shutdown R2(config-if)#ip router isis R2(config-if)#exit R2(config)#interface fastEthernet 1/0

R2(config-if)#ip address 11.0.0.1 255.255.255.252 R2(config-if)#no shutdown R2(config-if)#ip router isis R2(config-if)#exit R2(config)#router isis R2(config-router)#net 49.0001.0000.0000.2222.00 R2(config-router)#is-type level-1 R3(config)#interface fastEthernet 0/0 R3(config-if)#ip address 11.0.0.2 255.255.255.252 R3(config-if)#no shutdown R3(config-if)#ip router isis R3(config-if)#interface fastEthernet 1/0 R3(config-if)#ip address 12.0.0.1 255.255.255.252 R3(config-if)#no shutdown R3(config-if)#ip router isis R3(config-if)#exit R3(config)#router isis R3(config-router)#net 49.0001.0000.0000.3333.00 R3(config-router)#is-type level-1 R4(config)#interface fastEthernet 1/0 R4(config-if)#ip address 12.0.0.2 255.255.255.252 R4(config-if)#no shutdown R4(config-if)#ip router isis R4(config-if)#interface fastEthernet 0/0 R4(config-if)#ip address 13.0.0.1 255.255.255.252 R4(config-if)#no shutdown R4(config-if)#ip router isis R4(config-if)#exit R4(config)#router isis R4(config-router)#net 49.0001.0000.0000.4444.00 R4(config-router)#is-type level-1 R5(config)#interface fastEthernet 0/0 R5(config-if)#ip address 13.0.0.2 255.255.255.252 R5(config-if)#no shutdown R5(config-if)#ip router isis R5(config-if)#exit R5(config)#router isis R5(config-router)#net 49.0001.0000.0000.5555.00 R5(config-router)#is-type level-1

IS IS Adyacencias y diseño nivel 2

R1(config)#router isis R1(config-router)#net 49.0001.0000.0000.1111.00 R1(config-router)#is-type level-2 R2(config)#router isis R2(config-router)#net 49.0002.0000.0000.1111.00 R2(config-router)#is-type level-2

R3(config)#router isis R3(config-router)#net 49.0003.0000.0000.1111.00 R3(config-router)#is-type level-2 R4(config)#router isis R4(config-router)#net 49.0004.0000.0000.1111.00 R4(config-router)#is-type level-2 R5(config)#router isis R5(config-router)#net 49.0005.0000.0000.1111.00 R5(config-router)#is-type level-2

IS IS Funcionamiento y diseño jerarquico

R1(config)#router isis R1(config-router)#net 49.0002.0000.0000.4444.00 R1(config-router)#is-type level-1

R2(config)#router isis R2(config-router)#net 49.0002.0000.0000.2222.00 R2(config-router)#is-type level-1-2 R3(config)#router isis R3(config-router)#net 49.0001.0000.0000.1111.00 R3(config-router)#is-type level-2 R4(config)#router isis R4(config-router)#net 49.0003.0000.0000.3333.00 R4(config-router)#is-type level-1-2 R5(config)#router isis R5(config-router)#net 49.0003.0000.0000.5555.00 R5(config-router)#is-type level-1 No olvidar verificar si esta el comando ip router isis en las interfaces

IS IS Tipos de diseño y sumarización

R1(config)#interface loopback 0 R1(config-if)#ip address 172.16.0.1 255.255.0.0 R1(config-if)#ip router isis R1(config-if)#interface loopback 1 R1(config-if)#ip address 172.17.0.1 255.255.0.0 R1(config-if)#ip router isis R1(config-if)#interface loopback 2 R1(config-if)#ip address 172.20.0.1 255.255.0.0 R1(config-if)#ip router isis R1(config-if)#interface loopback 3 R1(config-if)#ip address 172.28.0.1 255.255.0.0 R1(config-if)#ip router isis

R2#show ip route

R2(config)#router isis R2(config-router)#summary-address 172.16.0.0 255.240.0.0 En los demás router que los siguen no saldrá asi, veamos nuevamente R2#show ip route

IS IS Redes NBMA y

configuración Broadcast

R1(config)#interface fastEthernet 0/0 R1(config-if)#ip address 192.168.1.1 255.255.255.0 R1(config-if)#no shutdown R1(config-if)#ip router isis R1(config-if)#exit R1(config)#interface serial 1/0 R1(config-if)#ip address 172.16.0.1 255.255.255.0 R1(config-if)#no shutdown R1(config-if)#ip router isis R1(config-if)#encapsulation frame-relay R1(config-if)#clns router isis R1(config-if)#frame-relay map clns 102 broadcast R1(config-if)#frame-relay map ip 172.16.0.2 102 broadcast R1(config-if)#frame-relay map clns 103 broadcast R1(config-if)#frame-relay map ip 172.16.0.3 103 broadcast R1(config-if)#frame-relay lmi-type ansi R1(config-if)#exit R1(config)#router isis R1(config-router)#net 49.0001.0000.0000.1111.00 R1(config-router)#is-type level-1 R2(config)#interface fastEthernet 0/0 R2(config-if)#ip address 192.168.2.1 255.255.255.0 R2(config-if)#no shutdown R2(config-if)#ip router isis R2(config-if)#exit R2(config)#interface serial 1/0

R2(config-if)#ip address 172.16.0.2 255.255.255.0 R2(config-if)#no shutdown R2(config-if)#ip router isis R2(config-if)#encapsulation frame-relay R2(config-if)#clns router isis R2(config-if)#frame-relay map clns 201 broadcast R2(config-if)#frame-relay map ip 172.16.0.1 201 broadcast R2(config-if)#frame-relay map clns 203 broadcast R2(config-if)#frame-relay map ip 172.16.0.3 203 broadcast R2(config-if)#frame-relay lmi-type ansi R2(config-if)#exit R2(config)#router isis R2(config-router)#net 49.0001.0000.0000.2222.00 R2(config-router)#is-type level-1 R3(config)#interface fastEthernet 0/0 R3(config-if)#ip address 192.168.3.1 255.255.255.0 R3(config-if)#no shutdown R3(config-if)#ip router isis R3(config-if)#exit R3(config)#interface serial 1/0 R3(config-if)#ip address 172.16.0.3 255.255.255.0 R3(config-if)#no shutdown R3(config-if)#ip router isis R3(config-if)#encapsulation frame-relay R3(config-if)#clns router isis R3(config-if)#frame-relay map clns 301 broadcast R3(config-if)#frame-relay map ip 172.16.0.1 301 broadcast R3(config-if)#frame-relay map clns 302 broadcast R3(config-if)#frame-relay map ip 172.16.0.2 302 broadcast R3(config-if)#frame-relay lmi-type ansi R3(config-if)#exit R3(config)#router isis R3(config-router)#net 49.0001.0000.0000.3333.00 R3(config-router)#is-type level-1

IS IS Redes NBMA Punto a punto

R1(config)#interface fastEthernet 0/0 R1(config-if)#ip address 192.168.1.1 255.255.255.0 R1(config-if)#no shutdown R1(config-if)#ip router isis R1(config-if)#int ser1/0 R1(config-if)#no shutdown R1(config-if)#encapsulation frame-relay R1(config)#int ser1/0.1 point-to-point R1(config-subif)#ip address 10.0.0.1 255.255.255.0 R1(config-subif)#ip router isis R1(config-subif)#frame-relay interface-dlci 102 R1(config-fr-dlci)#int ser1/0.2 point-to-point R1(config-subif)#ip address 11.0.0.1 255.255.255.0 R1(config-subif)#ip router isis R1(config-subif)#frame-relay interface-dlci 103 R1(config-fr-dlci)#exit R1(config-subif)#exit R1(config)#router isis R1(config-router)#net 49.0001.0000.0000.1111.00 R2(config)#interface fastEthernet 0/0 R2(config-if)#ip address 192.168.2.1 255.255.255.0 R2(config-if)#no shutdown R2(config-if)#ip router isis R2(config-if)#exit R2(config)#interface serial 1/0

R2(config-if)#no shutdown R2(config-if)#encapsulation frame-relay R2(config-if)#interface serial 1/0.1 point-to-point R2(config-subif)#ip address 10.0.0.2 255.255.255.0 R2(config-subif)#ip router isis R2(config-subif)#frame-relay interface-dlci 201 R2(config-fr-dlci)#interface serial 1/0.2 point-to-point R2(config-subif)#ip address 12.0.0.1 255.255.255.0 R2(config-subif)#ip router isis R2(config-subif)#frame-relay interface-dlci 203 R2(config-fr-dlci)#exit R2(config-subif)#exit R2(config)#router isis R2(config-router)#net 49.0002.0000.0000.2222.00 R3(config)#interface fastEthernet 0/0 R3(config-if)#ip address 192.168.3.1 255.255.255.0 R3(config-if)#no shutdown R3(config-if)#ip router isis R3(config-if)#exit R3(config)#interface serial 1/0 R3(config-if)#no shutdown R3(config-if)#encapsulation frame-relay R3(config-if)#interface serial 1/0.1 point-to-point R3(config-subif)#ip address 11.0.0.2 255.255.255.0 R3(config-subif)#ip router isis R3(config-subif)#frame-relay interface-dlci 301 R3(config-fr-dlci)#interface serial 1/0.2 point-to-point R3(config-subif)#ip address 12.0.0.2 255.255.255.0 R3(config-subif)#ip router isis R3(config-subif)#frame-relay interface-dlci 302 R3(config-fr-dlci)#exit R3(config-subif)#exit R3(config)#router isis R3(config-router)#net 49.0003.0000.0000.3333.00

IS IS Métrica e intervalos

R1(config)#interface fastEthernet 0/0 R1(config-if)#ip address 10.0.0.1 255.255.255.252 R1(config-if)#no shutdown R1(config-if)#ip router isis R1(config-if)#interface fastEthernet 1/0 R1(config-if)#ip address 12.0.0.1 255.255.255.252 R1(config-if)#no shutdown R1(config-if)#ip router isis R1(config-if)#exit R1(config)#router isis R1(config-router)#net 49.0001.0000.0000.1111.00 R2(config)#interface fastEthernet 0/0 R2(config-if)#ip address 10.0.0.2 255.255.255.252 R2(config-if)#no shutdown R2(config-if)#ip router isis R2(config-if)#interface fastEthernet 1/0 R2(config-if)#ip address 11.0.0.1 255.255.255.252 R2(config-if)#no shutdown R2(config-if)#ip router isis R2(config-if)#exit R2(config)#router isis R2(config-router)#net 49.0001.0000.0000.2222.00

R3(config)#interface fastEthernet 0/0 R3(config-if)#ip address 13.0.0.2 255.255.255.252

R3(config-if)#no shutdown R3(config-if)#ip router isis R3(config-if)#interface fastEthernet 1/0 R3(config-if)#ip address 11.0.0.2 255.255.255.252 R3(config-if)#no shutdown R3(config-if)#ip router isis R3(config-if)#exit R3(config)#router isis R3(config-router)#net 49.0001.0000.0000.3333.00 R3(config-router)#exit R3(config)#interface loopback 0 R3(config-if)#ip address 192.168.1.1 255.255.255.0 R3(config-if)#ip router isis R4(config)#interface fastEthernet 0/0 R4(config-if)#ip address 13.0.0.1 255.255.255.252 R4(config-if)#no shutdown R4(config-if)#ip router isis R4(config-if)#interface fastEthernet 1/0 R4(config-if)#ip address 12.0.0.2 255.255.255.252 R4(config-if)#no shutdown R4(config-if)#ip router isis R4(config-if)#exit R4(config)#router isis R4(config-router)#net 49.0001.0000.0000.4444.00 R1#show ip route

R1#traceroute 192.168.1.1

La métrica de todos los routers del protocolo isis es de 10, para modificar la ruta y dejar solo una ruta se configura en el router 2 según topología y se baja la métrica para que opte la ruta inferior. R2(config)#router isis R2(config-router)#metric 20 R2(config-router)#metric-style wide El comando metric-style wide debe estar en todos los routers del dominio R1#traceroute 192.168.1.1

IS IS Redistribución y ruta por defecto

R3(config)#interface fastEthernet 0/0 R3(config-if)#ip address 11.0.0.2 255.255.255.252 R3(config-if)#ip router isis R3(config-if)#no shutdown R3(config-if)#interface fastEthernet 1/0

R3(config-if)#ip address 12.0.0.1 255.255.255.252 R3(config-if)#ip router isis R3(config-if)#no shutdown R3(config-if)#router isis R3(config-router)#net 49.0001.0000.0000.1111.00 R3(config-router)#is-type level-2 R3(config-router)#exit R3(config)#ip route 0.0.0.0 0.0.0.0 12.0.0.2 R3(config)#interface fastEthernet 2/0 R3(config-if)#ip address 14.0.0.1 255.255.255.252 R3(config-if)#no shutdown R3(config-if)#router ospf 1 R3(config-router)#network 14.0.0.0 0.0.0.3 area 0 R3(config)#router isis R3(config-router)#redistribute ospf 1 metric 10 R3(config-router)#default-information originate R6(config)#interface fastEthernet 1/0 R6(config-if)#ip address 14.0.0.2 255.255.255.252 R6(config-if)#no shutdown R6(config-if)#interface fastEthernet 0/0 R6(config-if)#ip address 15.0.0.1 255.255.255.252 R6(config-if)#no shutdown R6(config-if)#router ospf 1 R6(config-router)#network 14.0.0.0 0.0.0.3 area 0 R6(config-router)#network 15.0.0.0 0.0.0.3 area 0 R7(config)#interface fastEthernet 0/0 R7(config-if)#ip address 15.0.0.2 255.255.255.252 R7(config-if)#no shutdown R7(config-if)#router ospf 1 R7(config-router)#network 15.0.0.0 0.0.0.3 area 0 R7(config-router)#exit R7(config)#interface loopback 0 R7(config-if)#ip address 172.16.0.1 255.255.255.0 R7(config-if)#router ospf 1 R7(config-router)#network 172.16.0.0 0.0.255.255 area 0 R1(config)#interface fastEthernet 0/0 R1(config-if)#ip address 10.0.0.1 255.255.255.252 R1(config-if)#no shutdown R1(config-if)#ip router isis R1(config-if)#exit R1(config)#router isis R1(config-router)#net 49.0001.0000.0000.4444.00 R1(config-router)#is-type level-1

R4(config)#interface fastEthernet 1/0 R4(config-if)#ip address 12.0.0.2 255.255.255.252 R4(config-if)#no shutdown R4(config-if)#ip router isis R4(config-if)#interface fastEthernet 0/0 R4(config-if)#ip address 13.0.0.2 255.255.255.252 R4(config-if)#no shutdown R4(config-if)#ip router isis R4(config-if)#exit R4(config)#router isis R4(config-router)#net 49.0001.0000.0000.3333.00 R4(config-router)#is-type level-1-2 R5(config)#interface fastEthernet 0/0 R5(config-if)#ip address 13.0.0.1 255.255.255.252 R5(config-if)#no shutdown R5(config-if)#ip router isis R5(config-if)#exit R5(config)#router isis R5(config-router)#net 49.0001.0000.0000.5555.00 R5(config-router)#is-type level-1 R2(config)#interface fastEthernet 1/0 R2(config-if)#ip address 11.0.0.1 255.255.255.252 R2(config-if)#no shutdown R2(config-if)#ip router isis R2(config-if)#interface fastEthernet 0/0 R2(config-if)#ip address 10.0.0.2 255.255.255.252 R2(config-if)#no shutdown R2(config-if)#ip router isis R2(config-if)#exit R2(config)#router isis R2(config-router)#net 49.0001.0000.0000.2222.00 R2(config-router)#is-type level-1-2 R2#show ip route

Una ves aplicada los comados de redistribute en el router 3 volvemos a realizar el show ip route

IS IS Seguridad y autenticación MD5 R1(config)#interface fastEthernet 0/0 R1(config-if)#isis password marcos R1(config)#router isis R1(config-router)#area-password araneda R1(config-router)#domain-password colina R1(config)#key chain marcos R1(config-keychain)#key 1 R1(config-keychain-key)#key-string marcos R1(config-keychain-key)#router isis R1(config-router)#authentication send-only (desactiva los mensajes) R1(config-router)#authentication mode md5 R1(config-router)#authentication key-chain marcos R1(config-router)#no authentication send-only (reactiva los mensajes)

Autenticación en las interfaces R4(config)#key chain marcos R4(config-keychain)#ke R4(config-keychain)#key 1 R4(config-keychain-key)#key R4(config-keychain-key)#key-string marcos R4(config-keychain-key)#exit R4(config-keychain)#exit R4(config)#interface fastEthernet 1/0 R4(config-if)#isis authentication send-only

R4(config-if)#isis authentication mode md5 R4(config-if)#isis authentication key-chain marcos R4(config-if)#no isis authentication send-only R5(config)#key chain marcos R5(config-keychain)#key 1 R5(config-keychain-key)#key-string marcos R5(config-keychain-key)#exit R5(config-keychain)#exit R5(config)#interface fastEthernet 1/0 R5(config-if)#isis authentication se R5(config-if)#isis authentication send-only R5(config-if)#isis authentication mode md5 R5(config-if)#isis authentication key-chain marcos R5(config-if)#no isis authentication send-only

IS IS Verificación R3#show clns neighbors R3#show clns interface R3#show isis database R3# show isis spf-log

Gestión de enrutamiento redistribute

R1(config)#router eigrp 1

R1(config-router)#redistribute rip metric 100000 (ancho de banda) R1(config-router)#redistribute rip metric 100000 100 (es el retraso o delay) R1(config-router)#redistribute rip metric 100000 100 255 (es la confiabilidad) R1(config-router)#redistribute rip metric 100000 100 255 1 (es la carga) R1(config-router)#redistribute rip metric 100000 100 255 1 1500 (es la mtu) R1(config-router)#redistribute rip metric 100000 100 255 1 1500 R1(config-router)#router rip

R1(config-router)#no auto-summary R1(config-router)#version 2 R1(config-router)#network 10.0.0.0 R1(config-router)#network 11.0.0.0 R1(config-router)#redistribute eigrp 1 metric 3 (que son los saltos o cantidad de routers)

Gestión de enrutamiento Herramientas agregando ospf

R1(config)#router ospf 1 R1(config-router)#network 12.0.0.0 0.0.0.3 area 0 R1(config-router)#redistribute eigrp 1 metric 100 (es el coste del fastEthernet) R1(config-router)#redistribute eigrp 1 metric 100 subnets R1(config-router)#redistribute rip metric 100 subnets R1(config-router)#exit R1(config)#router rip R1(config-router)#redistribute ospf 1 metric 3 R1(config-router)#exit R1(config)#router eigrp 1 R1(config-router)#redistribute ospf 1 metric 100000 100 255 1 1500

Gestión de enrutamiento Redistribución Static

R1(config)#ip route 192.168.4.0 255.255.255.0 13.0.0.2 R1(config)#router ospf 1 R1(config-router)#redistribute static metric 100000 subnets R1(config-router)#exit R1(config)#router eigrp 1 R1(config-router)#redistribute static metric 100000 100 255 1 1500 R1(config-router)#exit R1(config)#router rip R1(config-router)#redistribute static metric 1 R2(config)#ip route 0.0.0.0 0.0.0.0 20.0.0.2 R2(config)#router rip R2(config-router)#default-information originate R0#show ip route

Gestión de enrutamiento Redistribución Selección de rutas

R4(config)#router ospf 1 R4(config-router)#network 13.0.0.0 0.0.0.3 area 0 R4(config-router)#network 192.168.2.0 0.0.0.255 area 0 R4(config-router)#exit R4(config)#router rip R4(config-router)#version 2 R4(config-router)#no auto-summary R4(config-router)#network 14.0.0.0 R4(config-router)#network 192.168.2.0 R1(config)#router eigrp 1 R1(config-router)#no auto-summary R1(config-router)#network 10.0.0.0 0.0.0.3 R1(config-router)#network 11.0.0.0 0.0.0.3 R1(config-router)#network 12.0.0.0 0.0.0.3 R1(config-router)#exit R1(config)#router ospf 1 R1(config-router)#network 10.0.0.0 0.0.0.3 area 0 R1(config-router)#network 12.0.0.0 0.0.0.3 area 0 R1(config-router)#network 11.0.0.0 0.0.0.3 area 0 R1(config-router)#exit R1(config)#router rip R1(config-router)#version 2 R1(config-router)#no auto-summary R1(config-router)#network 10.0.0.0 R1(config-router)#network 11.0.0.0 R1(config-router)#network 12.0.0.0 R1(config-router)#exit R1(config)#router eigrp 1 R1(config-router)#redistribute ospf 1 metric 100000 100 255 1 1500 R1(config-router)#redistribute rip metric 100000 100 255 1 1500 La distancia administrativa de ospf es de 110 por lo tanto al enviar paquetes elegirá esa ruta por donde dirigirse, peros si queremos cambiar la ruta por donde dirigirse en este caso por

la ruta rip q tiene una distancia administrativa de 120, debemos cambiar la distancia a ospf por un numero mas alto en este caso le pondremos 150. Y se ira por la ruta de rip R1(config)#router ospf 1 R1(config-router)#dista R1(config-router)#distance 150

Gestión de enrutamiento Redistribución métrica

R2(config)#router eigrp 1 R2(config-router)#no auto-summary R2(config-router)#network 10.0.0.0 0.0.0.3 R2(config-router)#network 11.0.0.0 0.0.0.3 R2(config-router)#network 12.0.0.0 0.0.0.3 R2(config)#router ospf 1 R2(config-router)#network 11.0.0.0 0.0.0.3 area 0 R2(config-router)#network 12.0.0.0 0.0.0.3 area 0 R2(config-router)#network 10.0.0.0 0.0.0.3 area 0 R2(config)#router rip R2(config-router)#version 2 R2(config-router)#no auto-summary R2(config-router)#network 10.0.0.0 R2(config-router)#network 11.0.0.0 R2(config-router)#network 12.0.0.0 R2(config)#router eigrp 1 R2(config-router)#default-metric 100000 100 255 1 1500 R2(config-router)#redistribute ospf 1 R2(config-router)#redistribute rip

R2(config)#router ospf 1 R2(config-router)#default-metric 100000 R2(config-router)#redistribute eigrp 1 subnets R2(config-router)#redistribute rip subnets R2(config)#router rip R2(config-router)#default-metric 1 R2(config-router)#redistribute ospf 1 R2(config-router)#redistribute eigrp 1

Gestión de enrutamiento Redistribución IS-IS

R2(config)#router ospf 1 R2(config-router)#network 10.0.0.0 0.0.0.3 area 0 R2(config-router)#network 11.0.0.0 0.0.0.3 area 0 R2(config-router)#network 12.0.0.0 0.0.0.3 area 0 R2(config-router)#exit R2(config)#router eigrp 1 R2(config-router)#network 10.0.0.0 0.0.0.3 R2(config-router)#network 11.0.0.0 0.0.0.3 R2(config-router)#network 12.0.0.0 0.0.0.3 R2(config-router)#no auto-summary R2(config)#router isis R2(config-router)#redistribute ospf 1 metric 10 R2(config-router)#redistribute eigrp 1 metric 10 R2(config-router)#exit R2(config)#router ospf 1 R2(config-router)#redistribute isis metric 100000 subnets R2(config-router)#redistribute eigrp 1 metric 100000 subnets R2(config-router)#exit R2(config)#router eigrp 1

R2(config-router)#redistribute isis metric 100000 100 255 1 1500 R2(config-router)#redistribute ospf 1 metric 100000 100 255 1 1500

Gestión de enrutamiento Filtrado

R2(config)#router rip R2(config-router)#version 2 R2(config-router)#no auto-summary R2(config-router)#network 10.0.0.0 R2(config-router)#redistribute static R2(config-router)#redistribute ospf 1 R2(config-router)#default-metric 1 R2(config-router)#router ospf 1 R2(config-router)#network 11.0.0.0 0.0.0.3 area 0 R2(config-router)#redistribute static subnets R2(config-router)#redistribute rip subnets R2(config-router)#default-metric 100000 R3#show ip route

R3(config)#access-list 1 permit 192.168.1.0 R3(config)#access-list 1 permit 192.168.2.0 R3(config)#router ospf 1 R3(config-router)#distance 200 0.0.0.0 255.255.255.255 1 Esto quiere decir q aceptamos cualquier red cualquier mascara y con el identificativo de la la lista de acceso q en este caso es 1

R3#show ip route

Aquí ya hace la distancia modificada a 200

BGP

R0(config)#router bgp 100 R0(config-router)#bgp router-id 1.1.1.1 R0(config-router)#neighbor 10.10.10.2 remote-as 200 R0(config-router)#network 100.100.100.1 mask 255.255.255.0 R0(config-router)#network 101.101.101.1 mask 255.255.255.0 R0(config-router)#network 10.10.10.0 mask 255.255.255.0 R2(config)#router bgp 200 R2(config-router)#bgp router-id 2.2.2.2 R2(config-router)#neighbor 10.10.10.1 remote-as 100 R2(config-router)#neighbor 20.20.20.2 remote-as 300 R2(config-router)#network 10.10.10.0 mask 255.255.255.0 R2(config-router)#network 20.20.20.0 mask 255.255.255.0 R1(config)#router bgp 300 R1(config-router)#bgp router-id 3.3.3.3 R1(config-router)#neighbor 20.20.20.1 remote-as 200 R1(config-router)#network 20.20.20.0 mask 255.255.255.0

Ebgp y Ibgp

R1 router ospf 10 log-adjacency-changes passive-interface Serial0/1 network 1.1.1.0 0.0.0.255 area 0 network 10.10.10.0 0.0.0.255 area 0 network 30.30.30.0 0.0.0.255 area 0 ! router bgp 100 no synchronization bgp router-id 1.1.1.1 bgp log-neighbor-changes network 1.1.1.0 mask 255.255.255.0 neighbor 10.10.10.2 remote-as 100 neighbor 30.30.30.1 remote-as 300 no auto-summary R2 router ospf 10 log-adjacency-changes passive-interface Serial0/1 network 2.2.2.0 0.0.0.255 area 0 network 10.10.10.0 0.0.0.255 area 0 network 20.20.20.0 0.0.0.255 area 0

! router bgp 100 no synchronization bgp router-id 2.2.2.2 bgp log-neighbor-changes network 2.2.2.0 mask 255.255.255.0 neighbor 10.10.10.1 remote-as 100 neighbor 20.20.20.2 remote-as 200 no auto-summary R3 router bgp 200 no synchronization bgp router-id 3.3.3.3 bgp log-neighbor-changes network 3.3.3.0 mask 255.255.255.0 neighbor 20.20.20.1 remote-as 100 no auto-summary R4 router bgp 300 no synchronization bgp router-id 4.4.4.4 bgp log-neighbor-changes network 4.4.4.0 mask 255.255.255.0 neighbor 30.30.30.2 remote-as 100 no auto-summary