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:
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:
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 !