Cisco routers basic networking application with three-layer switch OSPF

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OSPF Networking Basic configuration:

1. Three-layer switch

Switch>enable

Switch#configure Terminal

Enter configuration commands, one per line. End withcntl/z.

Switch (config) #vlan// creating VLANs

Switch (Config-vlan) #interface VLAN// creating VLAN Virtual interfaces

%link-5-changed:interface Vlan10, CHANGED state-to-up

Switch (config-if) #ip address 192.168.10.254255.255.255.0// Set VLAN Virtual interface address

Switch (config-if) #interface FA0/1

Switch (config-if) #switchport access VLAN// set interface VLAN ID

%lineproto-5-updown:line protocol on INTERFACEVLAN10, changed

Switch (config-if) #interface fa0/24// Enter interface configuration mode

Router (config-if) #no shutdown// Enable/Open Interface

Switch (config-if) #no switchport // switch mode to route mode

Switch (config-if) #ip address 192.168.20.1255.255.255.0// set the interface IP address

Switch (config-if) #exit

Switch (config) #ip routing// Enable routing features

Switch (config) #router OSPF 1 // creating an OSPF process 1

Switch (Config-router) #network192.168.20.0 0.0.0.255 Area 1 // set subnet number and zone ID

Switch (config-router) #redistribute connected// Publish direct links to Lsdb

Switch (Config-router) #exit

Switch (config) #exit

switch#write// Save the current configuration to the system configuration file so that the next time you start using

2. Router R0

Router>enable

Router#configure Terminal

Enter configuration commands, one per line. End withcntl/z.

Router (config) #hostname R1// Modify Device Name

R1 (config) #interface fastethernet 0/0// Enter interface configuration mode

R1 (config-if) #ip address 192.168.20.2 255.255.255.0// set the interface IP address

R1 (config-if) #no shutdown// Enable/Open Interface

R1 (config-if) #interface fastethernet 0/1

R1 (config-if) #ip address 192.168.30.1 255.255.255.0

R1 (config-if) #no shutdown

R1 (config-if) #exit

R1 (config) # router OSPF 1// creating an OSPF process 1

R1 (config-router) #network 192.168. 0 0.0.0.255area 1 // set subnet number and zone ID

R1 (config-router) #network 192.168. 0 0.0.0.255area 0 // set subnet number and zone ID

R1 (Config-router) #exit

Router (config) #exit

Router#write

3. Router R1

Router>enable

Router#configure Terminal

Enter configuration commands, one per line. End withcntl/z.

Router (config) #hostname R1

R1 (config) #interface fastethernet 0/0

R1 (config-if) #ip address 192.168.30.2 255.255.255.0

R1 (config-if) #no shutdown

R1 (config-if) #interface fastethernet 0/1

R1 (config-if) #ip address 192.168.40.1 255.255.255.0

R1 (config-if) #no shutdown

R1 (config-if) #exit

R1 (config) #router OSPF 1

R1 (config-router) #network 192.168.30.0 0.0.0.255area 0

R1 (config-router) #network 192.168.40.0 0.0.0.255area 2

R1 (Config-router) #exit

R1 (config) #exit

R1#write

4. Router R2

Router>enable

Router#confiure Terminal

Enter configuration commands, one per line. End withcntl/z.

Router (config) #hostname R2

R2 (config) #interface fastethernet 0/0

R2 (config-if) #ip address 192.168.40.2 255.255.255.0

R2 (config-if) #no shutdown

R2 (config-if) #interface fastethernet 0/1

R2 (config-if) #ip address 192.168.50.254 255.255.255.0

R2 (config-if) #no shutdown

R2 (config-if) #exit

R2 (config) #router OSPF 1

R2 (config-router) #network 192.168.40.0 0.0.0.255area 2

R2 (config-router) #network 192.168.50.0 0.0.0.255area 2

R2 (Config-router) #exit

R2 (config) #exit

R2#write

View OSPF Routing table:

1. Three-layer switch

Switch#show IP route

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 nssaexternal 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 are not set

C 192.168.10.0/24 is directly connected, VLAN10

C 192.168.20.0/24 is directly connected,fastethernet0/24

O IA 192.168.30.0/24 [110/2] via 192.168.20.2,00:07:08, fastethernet0/24

O IA 192.168.40.0/24 [110/3] via 192.168.20.2,00:05:31, fastethernet0/24

OIA 192.168.50.0/24 [110/4] via 192.168.20.2, 00:03:34, fastethernet0/24

2. Router R2

R2#show IP route

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 Externaltype 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 are not set

O E2 192.168.10.0/24 [110/20] via 192.168.40.1,00:00:39, fastethernet0/0

O IA 192.168.20.0/24 [110/3] via 192.168.40.1,00:03:57, fastethernet0/0

O ia192.168.30.0/24 [110/2] via 192.168.40.1, 00:03:57, fastethernet0/0

C 192.168.40.0/24 is directly connected, fastethernet0/0

C 192.168.50.0/24 is directlyconnected, FASTETHERNET0/1

Network Connectivity Testing:

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Cisco routers basic networking application with three-layer switch OSPF