Laboratorio de enrutamiento OSPF con enlaces
PPP:
Clase de CCNA 4 del 2 de Mayo del 2009,
academia Cisco, Rosario
Instructor: Ernesto Vilarrasa
Este escenario es el propuesto por el capítulo 5
de Exploration 2, sección 5.4.1,
con la variante a OSPF y enlaces WAN con
protocolo PPP adaptado a CCNA 4.
Diagrma
original
Diagrama
en pizarrón
Diagrama
en Packet Tracer ( layout decente )
Desarrollo:
Se configuraron dos routers Cisco 1800 como Cordoba y BsAs, un router 2501 como Rosario.
Entre Rosario y BsAs se configuraron S1 y S0/0/0 y Rosario y Cordoba las S0 y S0/0/0
Las interfaces locales se configuraron en Eth0 (2501) y Fa0/0 (1800)
Rosario:
Rosario#sh run
!
hostname Rosario
!
username Cordoba password 0 cisco
username BSAS password 0 cisco
!
interface Ethernet0
ip address 172.30.3.1
255.255.255.0
no ip
directed-broadcast
!
interface Serial0
ip address 172.30.2.2
255.255.255.252
encapsulation
ppp
ppp
authentication chap
!
interface Serial1
ip address 192.168.4.9
255.255.255.252
encapsulation
ppp
ppp
authentication chap
!
router ospf 100
log-adjacency-changes
network
172.30.2.0 0.0.0.3 area 0
network
172.30.3.0 0.0.0.255 area 0
network
192.168.4.8 0.0.0.3 area 0
!
Sucursal BsAs:
BSAS#sh run
!
hostname BSAS
!
username Cordoba password 0 cisco
username Rosario password 0 cisco
!
interface FastEthernet0/0
ip address 192.168.5.1
255.255.255.0
!
interface Serial0/0/0
ip address 192.168.4.10
255.255.255.0
encapsulation
ppp
ppp
authentication chap
clockrate
64000
!
router ospf 100
log-adjacency-changes
network
192.168.4.8 0.0.0.3 area 0
network
192.168.5.0 0.0.0.255 area 0
!
Sucursal Cordoba:
cordoba#sh run
Building configuration...
!
hostname cordoba
!
username BSAS password 0 cisco
username Rosario password 0 cisco
!
interface FastEthernet0/0
ip address 172.30.1.1
255.255.255.0
!
interface Serial0/0/0
ip address 172.30.2.1
255.255.255.252
encapsulation
ppp
ppp
authentication chap
clockrate
64000
!
interface Loopback1
ip address
99.99.99.99 255.255.255.0
!
router ospf 100
log-adjacency-changes
network
172.30.2.0 0.0.0.3 area 0
network
172.30.3.0 0.0.0.255 area 0
network
192.168.4.8 0.0.0.3 area 0
!
Verificación:
Cordoba#sh ip route
...
Gateway of last resort is not set
99.0.0.0/24
is subnetted, 1 subnets
C
99.99.99.0 is directly connected, Loopback1
172.30.0.0/16
is variably subnetted, 5 subnets, 3 masks
C
172.30.2.0/30 is directly connected, Serial0
O 172.30.2.0/30 [110/1562] via 172.30.2.2, 00:18:17, Serial0
O 172.30.3.0/24 [110/782] via 172.30.2.2, 00:18:17, Serial0
C
172.30.2.2/32 is directly connected, Serial0
C
172.30.1.0/24 is directly connected, FastEthernet0
192.168.4.0/30
is subnetted, 1 subnets
Cordoba#
Rosario#sh ip route
...
Gateway of last resort is not set
172.30.0.0/16 is variably subnetted, 5 subnets, 3 masks
O 172.30.2.0/30 [110/1562] via 172.30.2.1, 00:17:50,
Serial0/0/0
C
172.30.2.0/30 is directly connected, Serial0/0/0
C
172.30.3.0/24 is directly connected, FastEthernet0/0
C
172.30.2.1/32 is directly connected, Serial0/0/0
O 172.30.1.0/24 [110/782] via 172.30.2.1, 00:17:50,
Serial0/0/0
192.168.4.0/24 is variably subnetted, 2 subnets, 2
masks
C
192.168.4.8/30 is directly connected, Serial0/0/1
C
192.168.4.10/32 is directly connected, Serial0/0/1
O 192.168.5.0/24 [110/782] via 192.168.4.10, 00:17:50, Serial0/0/1
BUENOSAIRES#sh ip route
...
Gateway of last resort is not set
172.30.0.0/16 is variably subnetted, 4
subnets, 2 masks
O 172.30.2.0/30 [110/2343] via 192.168.4.9, 00:17:10, Serial0
O
172.30.3.0/24 [110/782] via 192.168.4.9, 00:17:10, Serial0
O
172.30.1.0/24 [110/1563] via 192.168.4.9, 00:17:10, Serial0
192.168.4.0/24 is variably subnetted, 2 subnets, 2
masks
C
192.168.4.8/30 is directly connected, Serial0
C 192.168.4.9/32 is directly connected,
Serial0
C
192.168.5.0/24 is directly connected, FastEthernet0
BUENOSAIRES#
BUENOSAIRES#sh int s0/0/0
Serial0 is up, line protocol is up
Hardware is
PowerQUICC Serial
Internet
address is 192.168.4.10/30
MTU 1500
bytes, BW 128 Kbit, DLY 20000 usec,
reliability
255/255, txload 1/255, rxload 1/255
Encapsulation
PPP, LCP Open
Open:
CDPCP, IPCP, loopback not set
Last input
00:00:00, output 00:00:00, output hang never
Last clearing of "show inte...
Conclusión: Se observa que OSPF es un protocolo sin
clase, o sea soporta VLSM, pero
no resumen de rutas ya que arma un mapa
completo de la red.
PPP es utilizado con autenticación CHAP sin
mayores complicaciones que el error de tipeo.
__________________________________________________________________
Ernesto Vilarrasa evilarrasa@centroit.org.ar www.vilarrasa.com.ar