Rip Passive interface

passive-interface command is used to block RIP broadcasts on an interface connected to a subnet of a RIP-enabled network. In simple words, Passive-interface command is used in all routing protocols to disable sending updates out from a specific interface. A RIP Passive Interface in a nut shell prevents the RIP routing process from sending multicast/broadcast updates out a specified interface. A RIP Passive interface however does not block unicast updates. Keep in mind a Passive Interface DOES NOT block multicast/broadcast updates therefore the router would still process received RIP updates

Tasks:
Configure IP addresses as per diagram
Configure Rip on all networks
Configure R3 Fast Ethernet 0/0 interface to start Rip unicast
Debug by using following commands.
show ip route
show ip route rip
sh ip protocol
debug ip rip events
debug ip rip database

! R1 Configuration

interface Loopback0
ip address 20.1.2.1 255.255.255.255

interface FastEthernet0/0
ip address 1.1.1.10 255.255.255.0
no shut

router rip
version 2
network 1.0.0.0
network 20.0.0.0
no auto-summary


! R2 Configuration

interface Loopback0
ip address 20.1.1.1 255.255.255.255

interface FastEthernet0/0
ip address 1.1.1.20 255.255.255.0
no shut

router rip
version 2
network 1.0.0.0
network 20.0.0.0
no auto-summary


! R3 Configuration

interface Loopback0
ip address 30.1.1.1 255.255.255.255

interface Loopback1
ip address 30.1.2.1 255.255.255.255

interface FastEthernet0/0
ip address 1.1.1.30 255.255.255.0
no shut

router rip
version 2
passive-interface FastEthernet0/0
network 1.0.0.0
network 30.0.0.0
neighbor 1.1.1.20
no auto-summary

Explanation














































Configuring Passive interface on F0/0 of Router 3