RIPv2 & OSPF Basic Configuration Guide for Cisco Routers

Posted on May 7, 2024 in Language

RIPv2 Basic Configuration

Configuring Router-Switch Connections

R1(config)#interface fa0/0
R1(config-if)#ip address 172.30.1.1 255.255.255.0
R1(config-if)#duplex auto
R1(config-if)#speed auto
R1(config-if)#no shutdown
R1(config)#interface se0/0/0
R1(config-if)#ip address 209.165.200.230 255.255.255.252
R1(config-if)#clock rate 64000
R1(config-if)#no shutdown

Configuring RIPv2

R1(config)#router rip
R1(config-router)#passive-interface fa0/0
R1(config-router)#passive-interface fa0/1
R1(config-router)#network 172.30.0.0
R1(config-router)#network 109.165.200.0
R1(config)#line con 0
R1(config-line)#line vty 0 4
R1(config-line)#login
R2(config)#interface fa0/0
R2(config-if)#ip address 10.1.0.1 255.255.0.0
R2(config-if)#duplex auto
R2(config-if)#speed auto
R2(config-if)#no shutdown
R2(config)#interface serial 0/0/0
R2(config-if)#ip address 109.65.200.229 255.255.255.252
R2(config-if)#no shutdown
R2(config)#interface serial 0/0/1
R2(config-if)#ip address 209.165.200.233 255.255.255.252
R2(config-if)#clock rate 64000
R2(config-if)#no shutdown
R2(config)#router rip
R2(config-router)#passive-interface fastethernet 0/0
R2(config-router)#network 10.0.0.0
R2(config-router)#network 209.165.200.0
R2(config)#line con 0
R2(config-line)#line vty 0 4
R2(config-line)#login
R2#show ip interface brief
R3(config)#interface fa0/0
R3(config-if)#ip address 172.30.100.1 255.255.255.0
R3(config-if)#duplex auto
R3(config-if)#speed auto
R3(config-if)#no shutdown
R3(config)#interface s0/0/1
R3(config-if)#ip address 209.165.200.234 255.255.255.252
R3(config-if)#no shutdown
R3(config)#interface loopback0
R3(config-if)#ip address 172.30.110.1 255.255.255.0
R3(config)#interface loopback1
R3(config-if)#ip address 172.30.200.17 255.255.255.240
R3(config)#router rip
R3(config-router)#passive-interface fa0/0
R3(config-router)#network 172.30.0.0
R3(config-router)#network 209.15.200.0
R3(config)#line con 0
R3(config-line)#line vty 0 4
R3(config-line)#login

Enabling RIP Version 2

R2(config)#router rip
R2(config-router)#version 2
R1(config)#router rip
R1(config-router)#version 2
R3(config)#router rip
R3(config-router)#version 2

Disabling Automatic Summarization

R2(config)#router rip
R2(config-router)#no auto-summary
R1(config)#router rip
R1(config-router)#no auto-summary
R3(config)#router rip
R3(config-router)#no auto-summary

OSPF Basic Configuration

Configuring Router Interfaces

R1(config)#interface fa0/0
R1(config-if)#ip address 172.16.1.17 255.255.255.240
R1(config-if)#no shutdown
R1(config)#interface s0/0/0
R1(config-if)#ip address 192.168.10.1 255.255.255.252
R1(config-if)#no shutdown
R1(config)#interface s0/0/1
R1(config-if)#ip address 192.168.10.5 255.255.255.252
R1(config-if)#no shutdown
R2(config)#interface fa0/0
R2(config-if)#ip address 10.10.10.1 255.255.255.0
R2(config-if)#no shutdown
R2(config-if)#interface s0/0/0
R2(config-if)#ip address 192.168.10.2 255.255.255.252
R2(config-if)#no shutdown
R2(config-if)#interface s0/0/1
R2(config-if)#ip address 192.168.10.9 255.255.255.252
R2(config-if)#no shutdow
R3(config)#interface fa0/0
R3(config-if)#ip address 172.16.1.33 255.255.255.248
R3(config-if)#no shutdown
R3(config-if)#interface s0/0/0
R3(config-if)#ip address 192.168.10.6 255.255.255.252
R3(config-if)#no shutdown
R3(config-if)#interface s0/0/1
R3(config-if)#ip address 192.168.10.10 255.255.255.252
R3(config-if)#no shutdown

Configuring OSPF on Routers

R1(config)#router ospf 1
R1(config-router)#network 172.16.1.16 0.0.0.15 area 0
R1(config-router)#network 192.168.10.0 0.0.0.3 area 0
R1(config-router)#network 192.168.10.4 0.0.0.3 area 0
R2(config)#router ospf 1
R2(config-router)#network 10.10.10.0 0.0.0.255 area 0 
R2(config-router)#network 192.168.10.0 0.0.0.3 area 0 
R2(config-router)#network 192.168.10.8 0.0.0.3 area 0
R3(config)#router ospf 1
R3(config-router)#network 172.16.1.32 0.0.0.7 area 0
R3(config-router)#network 192.168.10.4 0.0.0.3 area 0 
R3(config-router)#network 192.168.10.8 0.0.0.3 area 0

Changing Router IDs with Loopback Addresses

R1(config)#interface loopback 0
R1(config-if)#ip address 10.1.1.1 255.255.255.255
R2(config)#interface loopback 0
R2(config-if)#ip address 10.2.2.2 255.255.255.255
R3(config)#interface loopback 0
R3(config-if)#ip address 10.3.3.3 255.255.255.255

Saving Configuration and Reloading

R1#copy running-config startup-config
R1#reload

Configuring OSPF Cost

Adjusting Serial Interface Bandwidth

R1(config)#interface serial0/0/0
R1(config-if)#bandwidth 64
R1(config-if)#interface serial0/0/1
R1(config-if)#bandwidth 64
R2(config)#interface serial0/0/0
R2(config-if)#bandwidth 64
R2(config)#interface serial0/0/1
R2(config-if)#bandwidth 64

Setting OSPF Cost on R3 Serial Interfaces

R3(config)#interface serial0/0/0
R3(config-if)#ip ospf cost 1562
R3(config-if)#interface serial0/0/1
R3(config-if)#ip ospf cost 1562

Redistributing a Default OSPF Route

Simulating ISP Link with Loopback

R1(config)#interface loopback1
R1(config-if)#ip address 172.30.1.1 255.255.255.252

Creating Default Route

R1(config)#ip route 0.0.0.0 0.0.0.0 loopback1

Redistributing Default Route via OSPF

R1(config)#router ospf 1
R1(config-router)#default-information originate