Convirtiendo un switch de capa 2 en sw de capa 3

Fecha: 15 de septiembre del 2014

 

Este tema corresponde al punto 5.3.1 de la currícula CCNA 2 R&S.

 

 

Escenario

 

 

Se realiza la demostración de cómo cambiar la funcionalidad de un switch Catalyst 2960 de layer 2 a layer 3,

Con algunas limitaciones, tales como la cantidad de redes directamente conectadas y de rutas estáticas.

 

SW_arriba#sh sdm prefer (verificamos)

 The current template is "default" template. (capa 2 solamente)

 The selected template optimizes the resources in

 the switch to support this level of features for

 0 routed interfaces and 255 VLANs.

 

  number of unicast mac addresses:                 8K

  number of IPv4 IGMP groups:                          0.25K

  number of IPv4/MAC qos aces:                       0.125k

  number of IPv4/MAC security aces:              0.375k

 

SW_arriba#conf t

SW_arriba(config)#sdm prefer ?

  default                           Default bias

  dual-ipv4-and-ipv6      Support both IPv4 and IPv6

  lanbase-routing            Lanbase routing

  qos                                  QoS bias

 

SW_arriba(config)#sdm prefer lanbase-routing

Changes to the running SDM preferences have been stored, but cannot take effect

until the next reload.

Use 'show sdm prefer' to see what SDM preference is currently active.

SW_arriba(config)#end

SW_arriba#sh sdm prefer (verificamos nuevamente)

 The current template is "default" template. (capa 2 solamente)

 The selected template optimizes the resources in

 the switch to support this level of features for

 0 routed interfaces and 255 VLANs.

 

  number of unicast mac addresses:                 8K

  number of IPv4 IGMP groups:                          0.25K

  number of IPv4/MAC qos aces:                       0.125k

  number of IPv4/MAC security aces:               0.375k

 

 On next reload, template will be "lanbase-routing" template.

 

SW_arriba#reload

Proceed with reload? [confirm] (enter)

 

*Mar  3 10:12:04.663: %SYS-5-RELOAD: Reload requested by console. Reload Reason: Reload command.

 

Loading "flash:/c2960-lanbasek9-mz.122-58.SE1.bin"...@@@@@@@@@@@@@@@@@@@@@@@

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

@@@@@@@@@@@

---resumido---

 

SW_arriba>ena

Password:

SW_arriba#sh sdm prefer (verificamos)

 The current template is "lanbase-routing" template.(capa 3)

 The selected template optimizes the resources in

 the switch to support this level of features for

 8 routed interfaces and 255 VLANs.

 

  number of unicast mac addresses:                                4K

  number of IPv4 IGMP groups + multicast routes:    0.25K

  number of IPv4 unicast routes:                                       4.25K

  number of directly-connected IPv4 hosts:                 4K

  number of indirect IPv4 routes:                                      0.25K

  number of IPv4 policy based routing aces:                 0

  number of IPv4/MAC qos aces:                                      0.125k

  number of IPv4/MAC security aces:                             0.375k

 

SW_arriba#sh ip route

Default gateway is not set

 

Host               Gateway           Last Use    Total Uses  Interface

ICMP redirect cache is empty

SW_arriba#

 

SW_arriba#conf t

SW_arriba(config-if)#int fa0/23

SW_arriba(config-if)#sw mode access

SW_arriba(config-if)#switchport access vlan 2

SW_arriba(config-if)#exit

SW_arriba(config)#int fa0/24

SW_arriba(config-if)#sw mode access

SW_arriba(config-if)#switchport access vlan 3

SW_arriba(config-if)#^Z

SW_arriba#SW_arriba(config)#ip rout?

route  routing

 

SW_arriba(config)#ip routing

SW_arriba(config)#^Z

SW_arriba#sh ip route

Codes: L - local, C - connected, S - static, 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

       i - IS-IS, su - IS-IS summary, 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, H - NHRP, l - LISP

       + - replicated route, % - next hop override

 

Gateway of last resort is not set

 

      192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks

C        192.168.1.0/24 is directly connected, Vlan1

L        192.168.1.1/32 is directly connected, Vlan1

      192.168.2.0/24 is variably subnetted, 2 subnets, 2 masks

C        192.168.2.0/24 is directly connected, Vlan2

L        192.168.2.1/32 is directly connected, Vlan2

      192.168.3.0/24 is variably subnetted, 2 subnets, 2 masks

C        192.168.3.0/24 is directly connected, Vlan3

L        192.168.3.1/32 is directly connected, Vlan3

SW_arriba#

 

SW_arriba#ping 192.168.2.100

 

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.2.100, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/4/9 ms

SW_arriba#ping 192.168.3.100

 

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.3.100, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/8 ms

SW_arriba#sh arp

Protocol  Address          Age (min)  Hardware Addr   Type   Interface

Internet  192.168.1.1             -       0021.1b0a.a4c0  ARPA   Vlan1

Internet  192.168.2.1             -       0021.1b0a.a4c1  ARPA   Vlan2

Internet  192.168.2.100       0       54be.f757.f30e  ARPA   Vlan2

Internet  192.168.3.1             -       0021.1b0a.a4c2  ARPA   Vlan3

Internet  192.168.3.100        0      54be.f757.f280  ARPA   Vlan3

SW_arriba#

 

Configuración del switch:

 

SW_arriba#sh runn (lo mas relevante)

Building configuration...

 

Current configuration : 5171 bytes

!

! Last configuration change at 01:24:35 UTC Mon Mar 1 1993

!

version 12.2

!

hostname SW_arriba

!

system mtu routing 1500

ip routing

!

spanning-tree mode pvst

spanning-tree extend system-id

!

vlan internal allocation policy ascending

!

interface FastEthernet0/1

interface FastEthernet0/2

interface FastEthernet0/3

interface FastEthernet0/4

---resumido---

!

interface FastEthernet0/23

 switchport access vlan 2

 switchport mode access

!

interface FastEthernet0/24

 switchport access vlan 3

 switchport mode access

!

interface GigabitEthernet0/1

!

interface GigabitEthernet0/2

!

interface Vlan1

 ip address 192.168.1.1 255.255.255.0

!

interface Vlan2

 ip address 192.168.2.1 255.255.255.0

!

interface Vlan3

 ip address 192.168.3.1 255.255.255.0

!

ip http server

ip http secure-server

!

line con 0

line vty 0 4

 password cisco

line vty 5 15

 password cisco

 login

!

end

 

SW_arriba#

 

(2014) Networking may be insane

Rosario, Argentina