Laboratorio de EIGRP con rutas de distinto ancho de banda para utilizar las

de menor velocidad como enlaces de backup.

Clase: Exploration 2 ( módulo 9: EIGRP ), 4 de Junio del 2009, Academia Cisco Rosario

Instructor: Ernesto Vilarrasa

 

Diagrama en pizarrón:

 

 

Diagrama en Packet Tracer:

Escenario real:

 

 

 

Todo el tráfico entre Rosario y Formosa se enruta vía Mendoza y Tucumán ya que

sus enlaces están configurados a 1544 Kb ( por default ) y por lo tanto, la métrica

EIGRP es más baja que en el resto de los enlaces, vía Córdoba, 512 Kb y directo

simulando Dial-Up, a 56 Kb.

 

Configuración de equipos:

 

Formosa:

 

!

hostname Formosa

!

interface FastEthernet0/0

 ip address 192.168.10.1 255.255.255.248

!

interface Serial0/0/0

 bandwidth 1544 (configurado por defecto)

 ip address 10.0.0.1 255.255.255.252

 clockrate 125000

!

interface Serial0/0/1

 bandwidth 56

 ip address 10.0.0.21 255.255.255.252

!

interface Serial0/1/0

 bandwidth 512

 ip address 10.0.0.17 255.255.255.252

 clockrate 125000

!

router eigrp 100

 network 10.0.0.0

 network 192.168.10.0

 auto-summary

!

end

 

Formosa#sh ip route

...

 

10.0.0.0/8 is variably subnetted, 7 subnets, 2 masks

D       10.0.0.0/8 is a summary, 00:00:10, Null0

C       10.0.0.0/30 is directly connected, Serial0/0/1

D       10.0.0.4/30 [90/2681856] via 10.0.0.2, 00:00:11, Serial0/0/1

D       10.0.0.8/30 [90/3193856] via 10.0.0.2, 00:00:11, Serial0/0/1

D       10.0.0.12/30 [90/6023936] via 10.0.0.18, 00:00:11, Serial0/0/0

C       10.0.0.16/30 is directly connected, Serial0/0/0

C       10.0.0.20/30 is directly connected, Serial0/1/0

D    172.16.0.0/16 [90/3196416] via 10.0.0.2, 00:00:11, Serial0/0/1

     192.168.0.0/24 is variably subnetted, 2 subnets, 2 masks

D       192.168.0.0/24 is a summary, 00:00:11, Null0

C       192.168.0.0/29 is directly connected, FastEthernet0/0

 

Tucumán:

 

!

hostname tucuman

!

interface Serial0

 ip address 10.0.0.5 255.255.255.252

!

interface Serial1

 ip address 10.0.0.2 255.255.255.252

!

router eigrp 100

 network 10.0.0.0

!

end

 

Mendoza:

 

!

hostname Mendoza

!

interface Serial0

 ip address 10.0.0.9 255.255.255.252

 no ip directed-broadcast

!

interface Serial1

 ip address 10.0.0.6 255.255.255.252

 no ip directed-broadcast

 clockrate 1300000

!

router eigrp 100

 network 10.0.0.4 0.0.0.3

 network 10.0.0.8 0.0.0.3

!

end

 

Córdoba:

 

!

hostname Cordoba

!

!

interface Serial0/0/0

 bandwidth 512

 ip address 10.0.0.18 255.255.255.252

 no fair-queue

!

interface Serial0/0/1

 bandwidth 512

 ip address 10.0.0.14 255.255.255.252

 clockrate 125000

!

router eigrp 100

 network 10.0.0.0

 auto-summary

!

end

 

Rosario:

 

!

hostname Rosario

!

interface FastEthernet0/0

 ip address 172.16.0.1 255.255.255.0

!

interface Serial0/0/0

 bandwidth 1544

 ip address 10.0.0.10 255.255.255.252

 clock rate 1300000

!

interface Serial0/0/1

 bandwidth 512

 ip address 10.0.0.13 255.255.255.252

!

interface Serial0/1/0

 bandwidth 56

 ip address 10.0.0.22 255.255.255.252

 clock rate 56000

!

router eigrp 100

 network 10.0.0.0

 network 172.16.0.0 0.0.0.255

 network 192.168.0.0 0.0.0.7

 auto-summary

!

end

 

Pruebas: se simula la caída del enlace a Mendoza ( 1544 Kb ) y automáticamente EIGRP

conmuta vía Córdoba ( 512 Kb ), peridendose sólo un “Ping” en la verificación:

 

Cae enlace Mendoza-Tucumán:

 

Rosario#sh ip ro

...

     10.0.0.0/8 is variably subnetted, 7 subnets, 2 masks

D       10.0.0.0/8 is a summary, 00:12:26, Null0

D       10.0.0.0/30 [90/3193856] via 10.0.0.9, 00:12:26, Serial0/0/0

D       10.0.0.4/30 [90/2681856] via 10.0.0.9, 00:12:27, Serial0/0/0

C       10.0.0.8/30 is directly connected, Serial0/0/0

C       10.0.0.12/30 is directly connected, Serial0/0/1

D       10.0.0.16/30 [90/6023936] via 10.0.0.14, 00:12:27, Serial0/0/1

C       10.0.0.20/30 is directly connected, Serial0/1/0

     172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks

D       172.16.0.0/16 is a summary, 00:12:27, Null0

C       172.16.0.0/24 is directly connected, FastEthernet0/0

D    192.168.0.0/24 [90/3196416] via 10.0.0.9, 00:12:26, Serial0/0/0

Rosario#

 

PC>ping 192.168.0.6 -t

 

Pinging 192.168.0.6 with 32 bytes of data:

 

Reply from 192.168.0.6: bytes=32 time=66ms TTL=124

Reply from 192.168.0.6: bytes=32 time=121ms TTL=124

Reply from 192.168.0.6: bytes=32 time=140ms TTL=124

Reply from 192.168.0.6: bytes=32 time=140ms TTL=124

Reply from 192.168.0.6: bytes=32 time=156ms TTL=124

Reply from 192.168.0.6: bytes=32 time=144ms TTL=124

Reply from 192.168.0.6: bytes=32 time=141ms TTL=124

Request timed out.

Reply from 192.168.0.6: bytes=32 time=125ms TTL=125

Reply from 192.168.0.6: bytes=32 time=109ms TTL=125

 

Rosario#sh ip ro

 

     10.0.0.0/8 is variably subnetted, 7 subnets, 2 masks

D       10.0.0.0/8 is a summary, 00:01:01, Null0

D       10.0.0.0/30 [90/6535936] via 10.0.0.14, 00:01:06, Serial0/0/1

D       10.0.0.4/30 [90/49298176] via 10.0.0.21, 00:01:01, Serial0/1/0

C       10.0.0.8/30 is directly connected, Serial0/0/0

C       10.0.0.12/30 is directly connected, Serial0/0/1

D       10.0.0.16/30 [90/6023936] via 10.0.0.14, 00:20:55, Serial0/0/1

C       10.0.0.20/30 is directly connected, Serial0/1/0

     172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks

D       172.16.0.0/16 is a summary, 00:20:55, Null0

C       172.16.0.0/24 is directly connected, FastEthernet0/0

D    192.168.0.0/24 [90/6026496] via 10.0.0.14, 00:01:06, Serial0/0/1

Rosario#

 

Cae enlace Rosario-Córdoba ( levanta el vículo 56 Kb ):

 

Rosario#sh ip ro

 

     10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks

D       10.0.0.0/8 is a summary, 00:02:01, Null0

D       10.0.0.0/30 [90/46738176] via 10.0.0.21, 00:03:11, Serial0/1/0

C       10.0.0.8/30 is directly connected, Serial0/0/0

C       10.0.0.20/30 is directly connected, Serial0/1/0

     172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks

D       172.16.0.0/16 is a summary, 00:33:28, Null0

C       172.16.0.0/24 is directly connected, FastEthernet0/0

D    192.168.0.0/24 [90/46228736] via 10.0.0.21, 00:03:11, Serial0/1/0

Rosario#

 

Métricas EIGRP de Rosario a Formosa:

 

3196416 a 1544 Kb

6026496 a 512 Kb

46228736 a 56 Kb

 

El análisis de las condiciones de factibilidad del algoritmo DUAL de EIGRP para una nueva ruta,

se desarrolarán en la clase de 11 de Junio.-

 

Router# labs end

 

Router> Connection lost !