1.1 Analiza la configuración de las tablas de encaminamiento de distintos equipos de la red (PC del alumno, Linux 1, Linux 2 y encaminadores CISCO) con las herramientas comentadas en clase (rexec). Comprueba el sentido de envío de paquetes (según destino) en función de los valores obtenidos en la tabla.
Para el acceso a los encaminadores CISCO del laboratorio emplea la herramienta “Rexec” en conexión con el linux 172.20.43.232 y comando:
rsh –l alumnos IP_router “sh ip route”, donde IP_router se corresponde con la IP asignada al encaminador.
Linux 1
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
10.3.2.0 0.0.0.0 255.255.255.255 UH 500 0 0 ppp0
10.4.2.1 10.3.2.0 255.255.255.255 UGH 500 0 0 ppp0
172.20.41.240 0.0.0.0 255.255.255.240 U 1500 0 0 eth0
172.20.43.0 10.3.2.0 255.255.255.0 UG 500 0 0 ppp0
10.1.0.0 10.3.2.0 255.255.255.0 UG 500 0 0 ppp0
10.3.0.0 0.0.0.0 255.255.0.0 U 500 0 0 ppp0
127.0.0.0 0.0.0.0 255.0.0.0 U 3584 0 0 lo
0.0.0.0 172.20.41.242 0.0.0.0 UG 1500 0 0 eth0
Linux 2
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
10.4.2.1 172.20.41.241 255.255.255.255 UGH 40 0 0 eth0
172.20.41.240 0.0.0.0 255.255.255.240 U 40 0 0 eth0
172.20.43.192 0.0.0.0 255.255.255.192 U 40 0 0 eth1
0.0.0.0 172.20.43.230 0.0.0.0 UG 40 0 0 eth1
Cisco 172.20.43.231
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is 10.4.2.2 to network 0.0.0.0
172.20.0.0/26 is subnetted, 1 subnets
C 172.20.43.192 is directly connected, Ethernet0
10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 10.4.2.0/30 is directly connected, Serial0
C 10.4.2.2/32 is directly connected, Serial0
S* 0.0.0.0/0 [1/0] via 10.4.2.2
cisco 2513
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is 172.25.40.65 to network 0.0.0.0
172.20.0.0/16 is variably subnetted, 3 subnets, 2 masks
S 172.20.43.192/26 [1/0] via 10.4.2.6
S 172.20.41.240/28 [1/0] via 10.3.7.0
C 172.20.41.224/28 is directly connected, TokenRing0
172.25.0.0/27 is subnetted, 1 subnets
C 172.25.40.64 is directly connected, Ethernet0
10.0.0.0/8 is variably subnetted, 7 subnets, 3 masks
C 10.4.2.4/30 is directly connected, Serial1
C 10.3.0.0/16 is directly connected, Async1
C 10.4.2.6/32 is directly connected, Serial1
S 10.1.0.0/16 [1/0] via 10.4.2.6
C 10.4.2.0/30 is directly connected, Serial0
C 10.4.2.1/32 is directly connected, Serial0
C 10.3.7.0/32 is directly connected, Async1
S* 0.0.0.0/0 [1/0] via 172.25.40.65
Cisco 230
