Lab  6.7.2 EIGRP Interface Summarization 

Objectives:

  • To reduce the number of routes in the EIGRP routing table through interface summarization.

Complete the following steps:

  1. Setup the lab as shown in the diagram. 
  2. Assign IP addresses to each interface. Copy and paste the 14 loopback interfaces on Router C. 
  3. Enable EIGRP as the routing protocol on all routers.
  4. Advertise network 172.16.0.0 on all routers with AS 100

    Verify your configurations are as follows:

    Router A's configuration is:

    hostname router-a
    interface Serial0
    ip address 172.16.1.1 255.255.255.0
    clockrate 56000
    router eigrp 100
    network 172.16.0.0

    Router B's configuration is:

    hostname router-b
    interface FastEthernet0/0
    ip address 172.16.16.1 255.255.255.0
    interface Serial0/0
    ip address 172.16.1.2 255.255.255.0
    router eigrp 100
    network 172.16.0.0

    Router C's configuration is:

    hostname router-c
    interface Loopback0
    ip address 172.16.17.1 255.255.255.0
    interface Loopback1
    ip address 172.16.18.1 255.255.255.0
    interface Loopback2
    ip address 172.16.19.1 255.255.255.0
    interface Loopback3
    ip address 172.16.20.1 255.255.255.0
    interface Loopback4
    ip address 172.16.21.1 255.255.255.0
    interface Loopback5
    ip address 172.16.22.1 255.255.255.0
    interface Loopback6
    ip address 172.16.23.1 255.255.255.0
    interface Loopback7
    ip address 172.16.24.1 255.255.255.0
    interface Loopback8
    ip address 172.16.25.1 255.255.255.0
    interface Loopback9
    ip address 172.16.26.1 255.255.255.0
    interface Loopback10
    ip address 172.16.27.1 255.255.255.0
    interface Loopback11
    ip address 172.16.28.1 255.255.255.0
    interface Loopback12
    ip address 172.16.29.1 255.255.255.0
    interface Loopback13
    ip address 172.16.30.1 255.255.255.0
    interface Loopback14
    ip address 172.16.31.1 255.255.255.0
    interface FastEthernet0/0
    ip address 172.16.16.2 255.255.255.0
    router eigrp 100
    network 172.16.0.0

  5. Issue the command show ip route from all routers in the EIGRP network. Record your findings below:

  6. To reduce the number of routes on Router A. Go to Router B and issue the following command:

    Router-b(config)#interface serial 0/0
    Router-b(config-if)# ip summary-address eigrp 100 172.16.16.0 255.255.240.0
    Router-b(config-if)#control Z

  7. Issue the command show ip route from all routers in the EIGRP network. Record your findings below: