configuring passive interface in eigrp

Passive interface in Eigrp

Configuring passive interface in eigrp does not work like rip. However in eigrp, inorder to send unicast updates we need to add the neighbour router interface ip address under interface mode.


router1>en
router1#conf terminal
router1(conf)#interface s 0/0
router1(conf-if)#neighbor 10.0.0.2 s0/0

similar is the configuration for router2
and u will have unicast updates send across the neighbor routers.


Route summerization.

Summerization is done inorder to decrease the size of routing table...
so as to save bandwidth and to stop sending updates due to flapping of any network.


Scenario:

A router with 3 loopbacks and and serial interface...
objective:Sending of summerized route through the interface

Configuration
router>en
router#configure terminal
router(config)#int serial interface 0/0
router(config-if)#ip address 10.0.0.1 255.0.0.0
router(config-if)#no shutdown


router(config)#int loopback 0
router(config-if)#ip address 1.1.1.1 255.255.255.0
!
router(config)#int loopback 1
router(config-if)#ip address 1.1.2.1 255.255.255.0
!
router(config)#int loopback 2
router(config-if)#ip address 1.1.3.1 255.255.255.0
!
router(config)#router eigrp 10
router(config-router)#net 10.0.0.0
router(config-router)#net 1.1.1.0
router(config-router)#no auto-summary
router(config-router)#exit
router(config)#int s 0/0
router(config-if)#ip summary-address eigrp 10 1.1.1.0 255.255.252.0