Escenario de RIP v1 y 2 simultáneos

Clase: Exploration 2  Fecha: 4 de Octubre 2012

 

Escenario

 

En este escenario, se simula la fusión de dos empresas, las cuales tienen RIPv2 (empresa 1) y RIP v1 (empresa 2)

y en la cual no es posible migrar a versión 2 (imaginemos equipos viejos).

El desafío es tener visibilidad en la red de extremo a extremo (llegar a todos lados) sin migrar ninguna versión.

 

Escenario disponible para completar en: ftp://ftp.vilarrasa.com.ar/ user y pass: ccna

 

Layout

 

Implementación RIP en Empresa 1

 

!

---resumido---

!

interface Serial0/1/1

 ip address 192.168.0.1 255.255.255.252

 clock rate 4000000

!

router rip

 version 2

 network 10.0.0.0

 network 192.168.0.0 (red en común)

!

---resumido---

end

 

RIP: sending  v2 update to 224.0.0.9 via Serial0/1/1 (192.168.0.1)

 

RIP: build update entries

 

      10.0.0.0/8 via 0.0.0.0, metric 1, tag 0 (sumariza por ser borde 10 -> 192.168)

 

RIP: ignored v1 packet from 192.168.0.2 (illegal version)

 

Casa_Central_1#sh ip route (verificación, no muestra la rut 172.16.0.0)

---resumido---

 

     10.0.0.0/27 is subnetted, 1 subnets

C       10.0.0.128 is directly connected, FastEthernet0/0

     192.168.0.0/30 is subnetted, 1 subnets

C       192.168.0.0 is directly connected, Serial0/1/1

Casa_Central_1#

 

En router RIP v1

 

RIP: received v2 update from 192.168.0.1 on Serial0/1/1 (no lo ve como ilegal)

 

      10.0.0.0/8 via 0.0.0.0 in 1 hops

 

RIP: sending  v1 update to 255.255.255.255 via Serial0/1/1 (192.168.0.2)

 

RIP: build update entries

 

      network 172.16.0.0 metric 1

 

Casa_Central_2#sh ip route (verificación)

---resumido---

 

R    10.0.0.0/8 [120/1] via 192.168.0.1, 00:00:04, Serial0/1/1 (aprende ruta)

     172.16.0.0/24 is subnetted, 5 subnets

C       172.16.0.0 is directly connected, FastEthernet0/0

R       172.16.1.0 [120/1] via 172.16.3.2, 00:00:21, Serial0/0/0

R       172.16.2.0 [120/1] via 172.16.4.1, 00:00:09, Serial0/0/1

C       172.16.3.0 is directly connected, Serial0/0/0

C       172.16.4.0 is directly connected, Serial0/0/1

     192.168.0.0/30 is subnetted, 1 subnets

C       192.168.0.0 is directly connected, Serial0/1/1

Casa_Central_2#

 

Solución:

 

Se crean rutas estáticas resumidas y se redistribuyen vía RIP en ambos routers

 

Casa_Central_1#conf t

Enter configuration commands, one per line.  End with CNTL/Z.

Casa_Central_1(config)#ip route 172.16.0.0 255.255.248.0 192.168.0.2

Casa_Central_1(config)#router rip

Casa_Central_1(config-router)#no network 192.168.0.0

Casa_Central_1(config-router)#redistribute static

Casa_Central_1(config-router)#^Z

Casa_Central_1#sh ip route (verificamos)

---resumido---

 

     10.0.0.0/27 is subnetted, 1 subnets

C       10.0.0.128 is directly connected, FastEthernet0/0

     172.16.0.0/21 is subnetted, 1 subnets

S       172.16.0.0 [1/0] via 192.168.0.2

     192.168.0.0/30 is subnetted, 1 subnets

C       192.168.0.0 is directly connected, Serial0/1/1

Casa_Central_1#

 

Cálculo de la ruta de resumen:

 

Todas las redes son 172.16.x.x, entonces buscamos en el 3er octeto bits en común:

 

00000000

00000001

00000010

00000011

00000100

 

128+64+32+16+8=248

 

Casa_Central_2#conf t

Enter configuration commands, one per line.  End with CNTL/Z.

Casa_Central_2(config)#ip route 10.0.0.128 255.255.255.128 192.168.0.1

Casa_Central_2(config)#router rip

Casa_Central_2(config-router)#redistribute static

Casa_Central_2(config-router)#no network 192.168.0.0

Casa_Central_2(config-router)#^Z

Casa_Central_2#sh ip route (verificamos)

---resumido---

 

     10.0.0.0/25 is subnetted, 1 subnets

S       10.0.0.128 [1/0] via 192.168.0.1

     172.16.0.0/16 is variably subnetted, 7 subnets, 3 masks

R       172.16.0.0/16 is possibly down, routing via 192.168.0.1, Serial0/1/1

R       172.16.0.0/21 [120/1] via 192.168.0.1, 00:03:51, Serial0/1/1

C       172.16.0.0/24 is directly connected, FastEthernet0/0

R       172.16.1.0/24 [120/1] via 172.16.3.2, 00:00:05, Serial0/0/0

R       172.16.2.0/24 [120/1] via 172.16.4.1, 00:00:26, Serial0/0/1

C       172.16.3.0/24 is directly connected, Serial0/0/0

C       172.16.4.0/24 is directly connected, Serial0/0/1

     192.168.0.0/30 is subnetted, 1 subnets

C       192.168.0.0 is directly connected, Serial0/1/1

Casa_Central_2#

 

Cálculo de la ruta de resumen:

 

Todas las redes son 10.0.0.x, entonces buscamos en el 4to octeto bits en común:

 

11000000

10000000

10100000

10101000

 

Verificación:

 

BsAs#sh ip route (del lado RIP v2)

---resumido---

 

     10.0.0.0/8 is variably subnetted, 7 subnets, 3 masks

R       10.0.0.128/27 [120/1] via 10.0.0.249, 00:00:06, Serial0/0/0

C       10.0.0.160/29 is directly connected, FastEthernet0/0

R       10.0.0.168/29 [120/2] via 10.0.0.249, 00:00:06, Serial0/0/0

R       10.0.0.192/27 [120/2] via 10.0.0.249, 00:00:06, Serial0/0/0

R       10.0.0.240/30 [120/1] via 10.0.0.249, 00:00:06, Serial0/0/0

R       10.0.0.244/30 [120/1] via 10.0.0.249, 00:00:06, Serial0/0/0

C       10.0.0.248/30 is directly connected, Serial0/0/0

     172.16.0.0/21 is subnetted, 1 subnets (se ve sin clase)

R       172.16.0.0 [120/1] via 10.0.0.249, 00:00:03, Serial0/0/0

 

BsAs#ping 172.16.0.1

 

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 172.16.0.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 49/57/63 ms

 

BsAs#ping 172.16.1.1

 

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 172.16.1.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 47/78/94 ms

 

BsAs#ping 172.16.2.1

 

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 172.16.2.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 78/86/94 ms

 

BsAs#ping 172.16.3.1

 

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 172.16.3.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 47/56/63 ms

 

BsAs#ping 172.16.4.1

 

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 172.16.4.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 66/85/94 ms

 

BsAs#

 

Prueba para probar la ruta de resúmen:  Generamos una interfaz virtual y que participe en RIP v1,

pero con un rango dentro del resúmen para asegurarnos llegar a ella:

 

Casa_Central_2#conf t

Enter configuration commands, one per line.  End with CNTL/Z.

Casa_Central_2(config)#int loopback 0

 

%LINK-5-CHANGED: Interface Loopback0, changed state to up

 

%LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed state to up

 

Casa_Central_2(config-if)#description Interfaz de pruebas de resumen

Casa_Central_2(config-if)#ip address 172.16.5.1 255.255.255.0

Casa_Central_2(config-if)#^Z

Casa_Central_2#

 

Mendoza#sh ip route (verificamos del lado RIP v1)

---resumido---

 

Gateway of last resort is not set

 

R    10.0.0.0/8 [120/1] via 172.16.3.1, 00:21:15, Serial0/0/0 (ver que es con clase)

     172.16.0.0/24 is subnetted, 6 subnets

R       172.16.0.0 [120/1] via 172.16.3.1, 00:00:10, Serial0/0/0

C       172.16.1.0 is directly connected, FastEthernet0/0

R       172.16.2.0 [120/2] via 172.16.3.1, 00:00:10, Serial0/0/0

C       172.16.3.0 is directly connected, Serial0/0/0

R       172.16.4.0 [120/1] via 172.16.3.1, 00:00:10, Serial0/0/0

R       172.16.5.0 [120/1] via 172.16.3.1, 00:00:10, Serial0/0/0

Mendoza#

 

BsAs#ping 172.16.5.1 (verificamos del lado RIP v2)

 

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 172.16.5.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 46/58/62 ms

 

BsAs#

 

Prueba para probar la ruta de resúmen:  Cambiamos la IP en la interfaz virtual con un rango

fuera del resúmen (ahora es la subred 8.0, que utiliza 4 bits: 8 = 1000).

 

Casa_Central_2#conf t

Enter configuration commands, one per line.  End with CNTL/Z.

Casa_Central_2(config)#int loop 0

Casa_Central_2(config-if)#ip address 172.16.8.1 255.255.255.0

Casa_Central_2(config-if)#^Z

Casa_Central_2#

 

Mendoza#sh ip route (verificamos del lado RIP v1)

---resumido---

 

R    10.0.0.0/8 [120/1] via 172.16.3.1, 00:26:32, Serial0/0/0

     172.16.0.0/24 is subnetted, 7 subnets

R       172.16.0.0 [120/1] via 172.16.3.1, 00:00:15, Serial0/0/0

C       172.16.1.0 is directly connected, FastEthernet0/0

R       172.16.2.0 [120/2] via 172.16.3.1, 00:00:15, Serial0/0/0

C       172.16.3.0 is directly connected, Serial0/0/0

R       172.16.4.0 [120/1] via 172.16.3.1, 00:00:15, Serial0/0/0

R       172.16.5.0 [120/1] via 172.16.3.1, 00:01:09, Serial0/0/0 (ver que persiste)

R       172.16.8.0 [120/1] via 172.16.3.1, 00:00:15, Serial0/0/0

 

Mendoza#sh ip route

---resumido---

 

R    10.0.0.0/8 [120/1] via 172.16.3.1, 00:28:16, Serial0/0/0

     172.16.0.0/24 is subnetted, 7 subnets

R       172.16.0.0 [120/1] via 172.16.3.1, 00:00:13, Serial0/0/0

C       172.16.1.0 is directly connected, FastEthernet0/0

R       172.16.2.0 [120/2] via 172.16.3.1, 00:00:13, Serial0/0/0

C       172.16.3.0 is directly connected, Serial0/0/0

R       172.16.4.0 [120/1] via 172.16.3.1, 00:00:13, Serial0/0/0

R       172.16.5.0 [120/1] via 172.16.3.1, 00:02:53, Seri(180 segundos = 3 minutos)

R       172.16.8.0 [120/1] via 172.16.3.1, 00:00:13, Serial0/0/0

 

Mendoza#sh ip route

---resumido---

 

R    10.0.0.0/8 [120/1] via 172.16.3.1, 00:28:23, Serial0/0/0

     172.16.0.0/24 is subnetted, 7 subnets

R       172.16.0.0 [120/1] via 172.16.3.1, 00:00:20, Serial0/0/0

C       172.16.1.0 is directly connected, FastEthernet0/0

R       172.16.2.0 [120/2] via 172.16.3.1, 00:00:20, Serial0/0/0

C       172.16.3.0 is directly connected, Serial0/0/0

R       172.16.4.0 [120/1] via 172.16.3.1, 00:00:20, Serial0/0/0

R       172.16.5.0 is possibly down, routing via 172.16.3.1 (hasta los 240 segundos)

R       172.16.8.0 [120/1] via 172.16.3.1, 00:00:20, Serial0/0/0

 

Mendoza#deb ip routing (verificamos cuando se elimina)

IP routing debugging is on

Mendoza#

 

RT: del 172.16.5.0 via 172.16.3.1, rip metric [120/16]

 

RT: delete network route to 172.16.5.0

 

RT: NET-RED 172.16.5.0/24

 

Mendoza#sh ip route (verificamos ruta eliminada)

---resumido---

 

R    10.0.0.0/8 [120/1] via 172.16.3.1, 00:28:30, Serial0/0/0

     172.16.0.0/24 is subnetted, 7 subnets

R       172.16.0.0 [120/1] via 172.16.3.1, 00:00:27, Serial0/0/0

C       172.16.1.0 is directly connected, FastEthernet0/0

R       172.16.2.0 [120/2] via 172.16.3.1, 00:00:27, Serial0/0/0

C       172.16.3.0 is directly connected, Serial0/0/0

R       172.16.4.0 [120/1] via 172.16.3.1, 00:00:27, Serial0/0/0

R       172.16.8.0 [120/1] via 172.16.3.1, 00:00:27, Serial0/0/0

Mendoza#

 

BsAs#ping 172.16.8.1 (volvamos a las pruebas !!!)(desde RIP v2)

 

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 172.16.8.1, timeout is 2 seconds:

U.U.U (no entra en la ruta estática resumida)

Success rate is 0 percent (0/5)

 

BsAs#

 

Casa_Central_1#conf t (modificamos ruta de resúmen a una adecuada)

Enter configuration commands, one per line.  End with CNTL/Z.

Casa_Central_1(config)#no ip route 172.16.0.0 255.255.248.0 192.168.0.2

Casa_Central_1(config)#ip route 172.16.0.0 255.255.240.0 192.168.0.2

Casa_Central_1(config)#^Z

Casa_Central_1#

 

BsAs#sh ip route

---resumido---

 

     10.0.0.0/8 is variably subnetted, 7 subnets, 3 masks

R       10.0.0.128/27 [120/1] via 10.0.0.249, 00:00:25, Serial0/0/0

C       10.0.0.160/29 is directly connected, FastEthernet0/0

R       10.0.0.168/29 [120/2] via 10.0.0.249, 00:00:25, Serial0/0/0

R       10.0.0.192/27 [120/2] via 10.0.0.249, 00:00:25, Serial0/0/0

R       10.0.0.240/30 [120/1] via 10.0.0.249, 00:00:25, Serial0/0/0

R       10.0.0.244/30 [120/1] via 10.0.0.249, 00:00:25, Serial0/0/0

C       10.0.0.248/30 is directly connected, Serial0/0/0

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

R       172.16.0.0/20 [120/1] via 10.0.0.249, 00:00:31, Serial0/0/0

R       172.16.0.0/21 is possibly down, routing via 10.0.0.249, Serial0/0/0

 

BsAs#debug ip routing (verificamos cuando se elimina)

 

RT: del 172.16.0.0 via 10.0.0.249, rip metric [120/16]

 

RT: delete network route to 172.16.0.0

 

RT: NET-RED 172.16.0.0/21

 

BsAs#sh ip route (verificamos ruta eliminada)

---resumido---

 

     10.0.0.0/8 is variably subnetted, 7 subnets, 3 masks

R       10.0.0.128/27 [120/1] via 10.0.0.249, 00:00:14, Serial0/0/0

C       10.0.0.160/29 is directly connected, FastEthernet0/0

R       10.0.0.168/29 [120/2] via 10.0.0.249, 00:00:14, Serial0/0/0

R       10.0.0.192/27 [120/2] via 10.0.0.249, 00:00:14, Serial0/0/0

R       10.0.0.240/30 [120/1] via 10.0.0.249, 00:00:14, Serial0/0/0

R       10.0.0.244/30 [120/1] via 10.0.0.249, 00:00:14, Serial0/0/0

C       10.0.0.248/30 is directly connected, Serial0/0/0

     172.16.0.0/20 is subnetted, 1 subnets

R       172.16.0.0 [120/1] via 10.0.0.249, 00:00:06, Serial0/0/0

BsAs#

 

BsAs#ping 172.16.8.1 (verificamos del lado RIP v2)

 

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 172.16.8.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 46/56/63 ms

 

BsAs#

 

Configuraciones relevantes ( routers de borde)

 

Con RIP versión 2:

 

Casa_Central_1#sh runn

Building configuration...

 

Current configuration : 896 bytes

!

hostname Casa_Central_1

!

interface FastEthernet0/0

 description Casa Central

 ip address 10.0.0.129 255.255.255.224

!

interface Serial0/0/0

 description enlace WAN a Rosario

 ip address 10.0.0.241 255.255.255.252

 clock rate 4000000

!

interface Serial0/0/1

 description enlace WAN a Cordoba

 ip address 10.0.0.245 255.255.255.252

 clock rate 1000000

!

interface Serial0/1/0

 description enlace WAN a BsAs

 ip address 10.0.0.249 255.255.255.252

!

interface Serial0/1/1

 description enlace WAN a RIP v1

 ip address 192.168.0.1 255.255.255.252

 clock rate 4000000

!

router rip

 version 2 (es una red con VLSM)

 redistribute static

 network 10.0.0.0

!

ip classless

ip route 172.16.0.0 255.255.248.0 192.168.0.2

!

end

 

Casa_Central_1#

 

Con RIP versión 1:

 

Casa_Central_2#sh runn

Building configuration...

 

Current configuration : 922 bytes

!

hostname Casa_Central_2

!

!

interface Loopback0

 description Interfaz de pruebas de resumen

 ip address 172.16.8.1 255.255.255.0

!

interface FastEthernet0/0

 description Casa Central

 ip address 172.16.0.1 255.255.255.0

!

interface Serial0/0/0

 description enlace WAN a Mendoza

 ip address 172.16.3.1 255.255.255.0

 clock rate 4000000

!

interface Serial0/0/1

 description enlace WAN a Tucuman

 ip address 172.16.4.2 255.255.255.0

!

interface Serial0/1/1

description enlace WAN a RIP v2

 ip address 192.168.0.2 255.255.255.252

!

router rip

 redistribute static

 network 172.16.0.0

!

ip classless

ip route 10.0.0.128 255.255.255.128 192.168.0.1

!

end

 

Casa_Central_2#exit

 

Connection lost !

 

 

(2012) Networking cause schizophrenia

Rosario, Argentina