Dynamic Routing Protocols – Lab Exercise

 Dynamic Routing Protocols – Lab Exercise


Pada lab ini anda akan meneliti fitur dimana ini adalah umum untuk semua Interior Gateway Protocols. Termasuk konfigurasi dasar dari variasi IGP tetapi tidak menjadi focus pada lab exercise ini. Konfigurasi untuk setiap IGP akan dilakukan secara detail nantinya. 


Lab Topology



Routing Protocol Updates


1) Enter the commands below on each router to provision a basic RIPv1 configuration and enable RIP on every interface.

router rip 

network 10.0.0.0 

no auto-summary

R1(config)#router rip 

R1(config-router)#network 10.0.0.0 

R1(config-router)#no auto-summary


R2(config)#router rip 

R2(config-router)#network 10.0.0.0 

R2(config-router)#no auto-summary


R3(config)#router rip 

R3(config-router)#network 10.0.0.0 

R3(config-router)#no auto-summary


R4(config)#router rip 

R4(config-router)#network 10.0.0.0 

R4(config-router)#no auto-summary


R5(config)#router rip 

R5(config-router)#network 10.0.0.0 

R5(config-router)#no auto-summary


2) Debug the routing protocol updates on R1 with the ‘debug ip rip’ command. Observe the updates being sent and received. What kind of traffic is used (unicast, broadcast or multicast)?

R1#debug ip rip

RIP: sending v1 update to 255.255.255.255 via FastEthernet1/0 (10.0.2.1)

RIP: build update entries

      network 10.0.0.0 metric 1

      network 10.0.1.0 metric 1

      network 10.0.3.0 metric 1

      network 10.1.0.0 metric 2

      network 10.1.1.0 metric 3

      network 10.1.2.0 metric 3

      network 10.1.3.0 metric 2 


Update routing dikirimkan menggunakan broadcast address 255.255.255.255. Seluruh host pada subnet harus memproses packet.


3) Enter the commands below to enable RIPv2 on every router.

router rip

version 2

R1(config)#router rip

R1(config-router)#version 2


R2(config)#router rip

R2(config-router)#version 2


R3(config)#router rip

R3(config-router)#version 2


R4(config)#router rip

R4(config-router)#version 2


R5(config)#router rip

R5(config-router)#version 2


4) What kind of traffic is used for the updates now?

RIP: sending  v2 update to 224.0.0.9 via FastEthernet0/0 (10.1.3.2)

RIP: build update entries

      10.0.0.0/24 via 0.0.0.0, metric 2, tag 0

      10.0.1.0/24 via 0.0.0.0, metric 2, tag 0

      10.0.2.0/24 via 0.0.0.0, metric 2, tag 0

      10.0.3.0/24 via 0.0.0.0, metric 1, tag 0

RIP: sending  v2 update to 224.0.0.9 via FastEthernet0/1 (10.0.3.2)

RIP: build update entries

      10.1.1.0/24 via 0.0.0.0, metric 2, tag 0

      10.1.2.0/24 via 0.0.0.0, metric 2, tag 0

      10.1.3.0/24 via 0.0.0.0, metric 1, tag 0

Dengan RIP versi 2, update routing dilakukan dengan menggunakan multicast address 224.0.0.9.


5) Turn off all debugging on R1.

R1(config)#no debug ip rip


6) Check that RIP routes have been added to R1 and it has a route to every subnet in the lab.

R1#show ip route | begin Gate

Gateway of last resort is not set


     10.0.0.0/8 is variably subnetted, 12 subnets, 2 masks

C       10.0.0.0/24 is directly connected, FastEthernet0/0

L       10.0.0.1/32 is directly connected, FastEthernet0/0

C       10.0.1.0/24 is directly connected, FastEthernet0/1

L       10.0.1.1/32 is directly connected, FastEthernet0/1

C       10.0.2.0/24 is directly connected, FastEthernet1/0

L       10.0.2.1/32 is directly connected, FastEthernet1/0

C       10.0.3.0/24 is directly connected, FastEthernet1/1

L       10.0.3.1/32 is directly connected, FastEthernet1/1

R       10.1.0.0/24 [120/1] via 10.0.0.2, 00:00:30, FastEthernet0/0

R       10.1.1.0/24 [120/2] via 10.0.0.2, 00:00:30, FastEthernet0/0

                    [120/2] via 10.0.3.2, 00:00:08, FastEthernet1/1

R       10.1.2.0/24 [120/2] via 10.0.3.2, 00:00:08, FastEthernet1/1

R       10.1.3.0/24 [120/1] via 10.0.3.2, 00:00:08, FastEthernet1/1


7) Why are there two routes to the 10.1.1.0/24 network in the routing table?

Karena jarak R1 menuju subnet 10.1.1.0 dengan via 10.0.0.2 dan 10.0.3.2 sama-sama melewati 2 hop.


Comparing Routing Protocols


8) View the RIP database on R1.

R1#show ip rip database 

10.0.0.0/24    auto-summary

10.0.0.0/24    directly connected, FastEthernet0/0

10.0.1.0/24    auto-summary

10.0.1.0/24    directly connected, FastEthernet0/1

10.0.2.0/24    auto-summary

10.0.2.0/24    directly connected, FastEthernet1/0

10.0.3.0/24    auto-summary

10.0.3.0/24    directly connected, FastEthernet1/1

10.1.0.0/24    auto-summary

10.1.0.0/24

    [1] via 10.0.0.2, 00:00:03, FastEthernet0/0

10.1.1.0/24    auto-summary

10.1.1.0/24

    [2] via 10.0.0.2, 00:00:03, FastEthernet0/0    [2] via 10.0.3.2, 00:00:09, FastEthernet1/1

10.1.2.0/24    auto-summary

10.1.2.0/24

    [2] via 10.0.3.2, 00:00:09, FastEthernet1/1

10.1.3.0/24    auto-summary

10.1.3.0/24

    [1] via 10.0.3.2, 00:00:09, FastEthernet1/1


9) Enter the commands below on each router to provision a basic OSPF configuration and enable OSPF on every interface.

router ospf 1

network 10.0.0.0 0.255.255.255 area 0

R1(config)#router ospf 1

R1(config-router)#network 10.0.0.0 0.255.255.255 area 0


R2(config)#router ospf 1

R2(config-router)#network 10.0.0.0 0.255.255.255 area 0


R3(config)#router ospf 1

R3(config-router)#network 10.0.0.0 0.255.255.255 area 0


R4(config)#router ospf 1

R4(config-router)#network 10.0.0.0 0.255.255.255 area 0


R5(config)#router ospf 1

R5(config-router)#network 10.0.0.0 0.255.255.255 area 0


10) Give OSPF time to converge. Are RIP routes included in the routing table on R1 now? Why or why not?

R1#show ip route | begin Gate

Gateway of last resort is not set


     10.0.0.0/8 is variably subnetted, 12 subnets, 2 masks

C       10.0.0.0/24 is directly connected, FastEthernet0/0

L       10.0.0.1/32 is directly connected, FastEthernet0/0

C       10.0.1.0/24 is directly connected, FastEthernet0/1

L       10.0.1.1/32 is directly connected, FastEthernet0/1

C       10.0.2.0/24 is directly connected, FastEthernet1/0

L       10.0.2.1/32 is directly connected, FastEthernet1/0

C       10.0.3.0/24 is directly connected, FastEthernet1/1

L       10.0.3.1/32 is directly connected, FastEthernet1/1

O       10.1.0.0/24 [110/2] via 10.0.0.2, 00:01:27, FastEthernet0/0

O       10.1.1.0/24 [110/3] via 10.0.0.2, 00:01:10, FastEthernet0/0

O       10.1.2.0/24 [110/4] via 10.0.0.2, 00:01:10, FastEthernet0/0

O       10.1.3.0/24 [110/13] via 10.0.0.2, 00:01:10, FastEthernet0/0


Routing tabel yang semula protocolnya RIP tergantikan oleh OSPF. Karena Administrative Distance OSPF (110) lebih baik dibandingkan RIP (120). Maka secara otomatis, router akan memprioritaskan routing protocol OSPF sebagai routing utamanya.


11) Why is there now only one route to the 10.1.1.0/24 network?

 Karena OSPF menggunakan cost sebagai metric-nya. Interface R5 yaitu jalur yang ada di bawah terkonfigurasi dengan bandwidth 10Mbps. Semua interface router pada jalur atas pada topologi adalah default bandwidth 100Mbps. Maka jalur inilah yang diprioritaskan untuk menjadi jalur OSPF dan seluruh trafficnya melalui via 10.0.0.2.

R5#show run | section interface

interface FastEthernet0/0

 bandwidth 10000

 ip address 10.1.3.2 255.255.255.0

 duplex auto

 speed auto

interface FastEthernet0/1

 bandwidth 10000

 ip address 10.0.3.2 255.255.255.0

 duplex auto

 speed auto


R2#show run | section interface

interface FastEthernet0/0

 ip address 10.0.0.2 255.255.255.0

 duplex auto

 speed auto

interface FastEthernet0/1

 ip address 10.1.0.2 255.255.255.0

 duplex auto

 speed auto


12) Disable interface FastEthernet 0/0 on R2. What do you expect to happen to R1’s routing table?

R2(config)#int f0/0

R2(config-if)#shut


Jalur routing yang seluruhnya melalui hop via 10.0.0.2 berubah menjadi 10.0.3.2. Karena jalur bagian atas terputus di bagian interface dari R2. Dikarenakan jalur di bawah masih ada konfigurasi dari OSPF. Maka secara otomatis rute akan dialihkan melalui jalur bawah.


13) Verify your expected changes to R1’s routing table.

R1#show ip route | begin Gate

Gateway of last resort is not set


     10.0.0.0/8 is variably subnetted, 10 subnets, 2 masks

C       10.0.1.0/24 is directly connected, FastEthernet0/1

L       10.0.1.1/32 is directly connected, FastEthernet0/1

C       10.0.2.0/24 is directly connected, FastEthernet1/0

L       10.0.2.1/32 is directly connected, FastEthernet1/0

C       10.0.3.0/24 is directly connected, FastEthernet1/1

L       10.0.3.1/32 is directly connected, FastEthernet1/1

O       10.1.0.0/24 [110/22] via 10.0.3.2, 00:00:35, FastEthernet1/1

O       10.1.1.0/24 [110/21] via 10.0.3.2, 00:00:35, FastEthernet1/1

O       10.1.2.0/24 [110/21] via 10.0.3.2, 00:00:35, FastEthernet1/1

O       10.1.3.0/24 [110/20] via 10.0.3.2, 00:00:35, FastEthernet1/1


14) Aside from the next hop address, what else has changed on the routing table?

Rute yang baru memiliki metric lebih tinggi. Inilah mengapa rute ini sebelumnya tidak muncul disaat jalur via R2 masih bekerja.


15) View the OSPF database on R1 with the ‘show ip ospf database’ command. What is different between it and the RIP database? Why?

RIP adalah routing protocol dengan Distance Vector. Maka dia hanya tahu neighbors dengan directly connected dan daftar network tetangga yang sudah advertised.

Sementara OSPF adalah routing protocol dengan Link State. Maka dia bisa tahu status dari seluruh link pada router-router yang ada di areanya

R1#show ip ospf database

OSPF Router with ID (10.0.3.1) (Process ID 1)


                Router Link States (Area 0)


Link ID ADV Router Age Seq# Checksum Link count

10.0.3.1        10.0.3.1 628 0x80000007 0x00775c 3

10.1.0.2        10.1.0.2 628 0x80000005 0x00c15c 1

10.1.1.2        10.1.1.2 299 0x80000005 0x003ab7 2

203.0.113.1     203.0.113.1 296 0x80000006 0x00dd86 3

10.1.3.2        10.1.3.2 294 0x80000005 0x00824f 2


                Net Link States (Area 0)

Link ID         ADV Router      Age Seq# Checksum

10.1.0.1        10.1.1.2        307 0x80000002 0x00f4d8

10.1.1.1        203.0.113.1     301 0x80000003 0x00207c

10.1.3.1        203.0.113.1     296 0x80000004 0x0055ff

10.0.3.2        10.1.3.2        296 0x80000002 0x00b93e



Routing Protocol Metrics and Administrative Distance



16) Enter the command below to remove OSPF on every router

no router ospf 1

R1(config)#no router ospf 1


R2(config)#no router ospf 1


R3(config)#no router ospf 1


R4(config)#no router ospf 1


R5(config)#no router ospf 1


17) Will R1 still have connectivity to R4?

R1 masih bisa terhubung karena masih ada jalur bawah atau R5 yang terkonfigurasi dengan protocol routing RIP.

R1#show ip route | begin Gate

Gateway of last resort is not set


     10.0.0.0/8 is variably subnetted, 10 subnets, 2 masks

C       10.0.1.0/24 is directly connected, FastEthernet0/1

L       10.0.1.1/32 is directly connected, FastEthernet0/1

C       10.0.2.0/24 is directly connected, FastEthernet1/0

L       10.0.2.1/32 is directly connected, FastEthernet1/0

C       10.0.3.0/24 is directly connected, FastEthernet1/1

L       10.0.3.1/32 is directly connected, FastEthernet1/1

R       10.1.0.0/24 [120/3] via 10.0.3.2, 00:00:13, FastEthernet1/1

R       10.1.1.0/24 [120/2] via 10.0.3.2, 00:00:13, FastEthernet1/1

R       10.1.2.0/24 [120/2] via 10.0.3.2, 00:00:13, FastEthernet1/1

R       10.1.3.0/24 [120/1] via 10.0.3.2, 00:00:13, FastEthernet1/1



18) What is the metric to the 10.1.1.0/24 network on R1?

Metric dengan 2 hop


19) Why is there only one route on R1 to the 10.1.1.0/24 network now?

Karena link R1 menuju R2 masih terputus


20) Make the required change so that there are two routes to the 10.1.1.0/24 network in the routing table on R1.

R2(config)#int f0/0

R2(config-if)#no shut

R1#show ip route | begin Gate

Gateway of last resort is not set


     10.0.0.0/8 is variably subnetted, 12 subnets, 2 masks

C       10.0.0.0/24 is directly connected, FastEthernet0/0

L       10.0.0.1/32 is directly connected, FastEthernet0/0

C       10.0.1.0/24 is directly connected, FastEthernet0/1

L       10.0.1.1/32 is directly connected, FastEthernet0/1

C       10.0.2.0/24 is directly connected, FastEthernet1/0

L       10.0.2.1/32 is directly connected, FastEthernet1/0

C       10.0.3.0/24 is directly connected, FastEthernet1/1

L       10.0.3.1/32 is directly connected, FastEthernet1/1

R       10.1.0.0/24 [120/1] via 10.0.0.2, 00:00:24, FastEthernet0/0

R       10.1.1.0/24 [120/2] via 10.0.3.2, 00:00:04, FastEthernet1/1

                    [120/2] via 10.0.0.2, 00:00:24, FastEthernet0/0

R       10.1.2.0/24 [120/2] via 10.0.3.2, 00:00:04, FastEthernet1/1

R       10.1.3.0/24 [120/1] via 10.0.3.2, 00:00:04, FastEthernet1/1



21) Enter the commands below on each router to provision a basic EIGRP configuration and enable EIGRP on every interface.

router eigrp 100 

no auto-summary

network 10.0.0.0 0.255.255.255

R1(config)#router eigrp 100 

R1(config-router)#no auto-summary

R1(config-router)#network 10.0.0.0 0.255.255.255


R2(config)#router eigrp 100 

R2(config-router)#no auto-summary

R2(config-router)#network 10.0.0.0 0.255.255.255


R3(config)#router eigrp 100 

R3(config-router)#no auto-summary

R3(config-router)#network 10.0.0.0 0.255.255.255


R4(config)#router eigrp 100 

R4(config-router)#no auto-summary

R4(config-router)#network 10.0.0.0 0.255.255.255


R5(config)#router eigrp 100 

R5(config-router)#no auto-summary

R5(config-router)#network 10.0.0.0 0.255.255.255


22) What changes do you expect to see in the routing tables? Why?

Protocol routing RIP seluruhnya akan digantikan dengan EIGRP. Karena Administrative Distance EIGRP (90) lebih baik dibandingkan dengan RIP (120). Maka secara otomatis protocol routing EIGRP menjadi yang lebih diutamakan.


23) Verify the changes to the routing table on R1.

R1#show ip route | begin Gate

Gateway of last resort is not set


     10.0.0.0/8 is variably subnetted, 12 subnets, 2 masks

C       10.0.0.0/24 is directly connected, FastEthernet0/0

L       10.0.0.1/32 is directly connected, FastEthernet0/0

C       10.0.1.0/24 is directly connected, FastEthernet0/1

L       10.0.1.1/32 is directly connected, FastEthernet0/1

C       10.0.2.0/24 is directly connected, FastEthernet1/0

L       10.0.2.1/32 is directly connected, FastEthernet1/0

C       10.0.3.0/24 is directly connected, FastEthernet1/1

L       10.0.3.1/32 is directly connected, FastEthernet1/1

D       10.1.0.0/24 [90/30720] via 10.0.0.2, 00:01:18, FastEthernet0/0

D       10.1.1.0/24 [90/33280] via 10.0.0.2, 00:01:08, FastEthernet0/0

D       10.1.2.0/24 [90/35840] via 10.0.0.2, 00:01:00, FastEthernet0/0

D       10.1.3.0/24 [90/261120] via 10.0.3.2, 00:00:54, FastEthernet1/1


24) What is the metric to the 10.1.1.0/24 network on R1?

Metricnya adalah 33280. Perhitungannya adalah metric = [K1 * bandwidth + (K2 * bandwidth) / (256 - load) + K3 * delay] * [K5 / (reliability + K4)].


25) Why is there only one route to the 10.1.1.0/24 network on R1?

Perhitungan metric diambil salah satunya dari total bandwidth. Dikarenakan network 10.1.1.0 pada jalur atas nilainya lebih baik dibandingkan dengan jalur bawah, maka jalur yang digunakan hanya jalur atas saja.


26) Disable RIP and EIGRP on R5 with the commands below.

R5(config)#no router rip 

R5(config)#no router eigrp 100

R5(config)#no router rip

R5(config)#no router eigrp 100


27) Configure the network so that there is still connectivity between all subnets if the link between R1 and R2 goes down. Accomplish this with six commands. Do not enable EIGRP on R5 but note that the routing protocol is expected to be enabled there in the future.

Floating static routes perlu ditambahkan sebagai backup dari rute EIGRP. Kita butuh memastikan rute EIGRP sebagai yang utama saat bersedia. Maka kita set AD static route menjadi 95 lebih tinggi daripada AD EIGRP 90.

R1(config)#ip route 10.1.0.0 255.255.0.0 10.0.3.2 95


R2(config)#ip route 10.0.0.0 255.255.0.0 10.1.0.1 95


R3(config)#ip route 10.0.0.0 255.255.0.0 10.1.1.1 95


R4(config)#ip route 10.0.0.0 255.255.0.0 10.1.3.2 95


R5(config)#ip route 10.0.0.0 255.255.0.0 10.0.3.1 95

R5(config)#ip route 10.1.0.0 255.255.0.0 10.1.3.1 95

R5 tidak menjalankan EIGRP sehingga saat ini tidak perlu mengatur Administrative Distance untuk rutenya ke 95. Namun AD tetap diperlukan karena untuk mencegah rute static float menjadi prioritas saat EIGRP diaktifkan nanti.

Summary route perlu digunakan untuk menyelesaikan tugas dalam enam perintah.


28) What changes do you expect to see to the routing table on R1?

Summary route akan ditambahkan ke tabel routing namun tidak akan digunakan karena panjang prefixnya /16 yang dibandingkan dengan EIGRP dengan prefix /24.

Jika floating static route individual ditambahkan ke setiap network tujuan dengan prefix /24. Maka kemudian tidak akan muncul pada routing table karena EIGRP memiliki AD yang lebih baik.


29) Verify the changes to the routing table on R1.

R1#show ip route | begin Gate

Gateway of last resort is not set


     10.0.0.0/8 is variably subnetted, 13 subnets, 3 masks

C       10.0.0.0/24 is directly connected, FastEthernet0/0

L       10.0.0.1/32 is directly connected, FastEthernet0/0

C       10.0.1.0/24 is directly connected, FastEthernet0/1

L       10.0.1.1/32 is directly connected, FastEthernet0/1

C       10.0.2.0/24 is directly connected, FastEthernet1/0

L       10.0.2.1/32 is directly connected, FastEthernet1/0

C       10.0.3.0/24 is directly connected, FastEthernet1/1

L       10.0.3.1/32 is directly connected, FastEthernet1/1

S       10.1.0.0/16 [95/0] via 10.0.3.2

D       10.1.0.0/24 [90/30720] via 10.0.0.2, 05:16:22, FastEthernet0/0

D       10.1.1.0/24 [90/33280] via 10.0.0.2, 05:16:22, FastEthernet0/0

D       10.1.2.0/24 [90/35840] via 10.0.0.2, 05:16:22, FastEthernet0/0

D       10.1.3.0/24 [90/266240] via 10.0.0.2, 05:16:22, FastEthernet0/0


30) Verify that traffic from PC1 to PC3 still goes via R2.


31) Shut down interface FastEthernet 0/0 on R2.

R2(config)#int f0/0

R2(config-if)#shutdown


32) What changes do you expect to see on R1’s routing table?

Rute EIGRP akan dihilangkan


33) Verify the changes to the routing table on R1.

R1#show ip route | begin Gate

Gateway of last resort is not set


     10.0.0.0/8 is variably subnetted, 7 subnets, 3 masks

C       10.0.1.0/24 is directly connected, FastEthernet0/1

L       10.0.1.1/32 is directly connected, FastEthernet0/1

C       10.0.2.0/24 is directly connected, FastEthernet1/0

L       10.0.2.1/32 is directly connected, FastEthernet1/0

C       10.0.3.0/24 is directly connected, FastEthernet1/1

L       10.0.3.1/32 is directly connected, FastEthernet1/1

S       10.1.0.0/16 [95/0] via 10.0.3.2


34) Verify connectivity between PC1 and PC3.


35) Verify the traffic goes via R5.


36) Bring interface FastEthernet 0/0 on R2 back up.

R2(config)#int f0/0

R2(config-if)#no shutdown


37) Enter the commands below on R5 to provision a basic EIGRP configuration and enable EIGRP on every interface.

R5(config)#router eigrp 100 

R5(config-router)#no auto-summary

R5(config-router)#network 10.0.0.0 0.255.255.255

R5(config)#router eigrp 100

R5(config-router)#no auto-summary

R5(config-router)#network 10.0.0.0 0.255.255.255


Loopback Interfaces



38) Configure loopback interface 0 on each router. Assign the IP address 192.168.0.x/32, where ‘x’ is the router number (for example 192.168.0.3/32 on R3.)

R1(config)#int lo0

R1(config-if)#ip address 192.168.0.1 255.255.255.255


R2(config)#int lo0

R2(config-if)#ip address 192.168.0.2 255.255.255.255


R3(config)#int lo0

R3(config-if)#ip address 192.168.0.3 255.255.255.255


R4(config)#int lo0

R4(config-if)#ip address 192.168.0.4 255.255.255.255


R5(config)#int lo0

R5(config-if)#ip address 192.168.0.5 255.255.255.255


39) Is there connectivity to the loopback interfaces from the PCs? Why or why not?

PC tidak dapat terkoneksi ke semua interface loopback karena tidak ada pada routing table. Tidak ada pada routing table dikarenakan IP address interface loopback diluar dari network yang sudah dikonfigurasi sebelumnya.

PC hanya dapat terkoneksi dengan interface loopback pada router yang berada pada satu subnet.


40) Enter the commands below on each router to include the loopback interfaces in EIGRP.

R1(config)#router eigrp 100

R1(config-router)#network 192.168.0.0 0.0.0.255

R1(config)#router eigrp 100

R1(config-router)#network 192.168.0.0 0.0.0.255


R2(config)#router eigrp 100

R2(config-router)#network 192.168.0.0 0.0.0.255


R3(config)#router eigrp 100

R3(config-router)#network 192.168.0.0 0.0.0.255


R4(config)#router eigrp 100

R4(config-router)#network 192.168.0.0 0.0.0.255


R5(config)#router eigrp 100

R5(config-router)#network 192.168.0.0 0.0.0.255


41) Verify the loopback interfaces are in the routing table on R1.

R1#show ip route | begin Gate

Gateway of last resort is not set


     10.0.0.0/8 is variably subnetted, 13 subnets, 3 masks

C       10.0.0.0/24 is directly connected, FastEthernet0/0

L       10.0.0.1/32 is directly connected, FastEthernet0/0

C       10.0.1.0/24 is directly connected, FastEthernet0/1

L       10.0.1.1/32 is directly connected, FastEthernet0/1

C       10.0.2.0/24 is directly connected, FastEthernet1/0

L       10.0.2.1/32 is directly connected, FastEthernet1/0

C       10.0.3.0/24 is directly connected, FastEthernet1/1

L       10.0.3.1/32 is directly connected, FastEthernet1/1

S       10.1.0.0/16 [95/0] via 10.0.3.2

D       10.1.0.0/24 [90/30720] via 10.0.0.2, 00:13:00, FastEthernet0/0

D       10.1.1.0/24 [90/33280] via 10.0.0.2, 00:13:00, FastEthernet0/0

D       10.1.2.0/24 [90/35840] via 10.0.0.2, 00:13:00, FastEthernet0/0

D       10.1.3.0/24 [90/261120] via 10.0.3.2, 00:01:36, FastEthernet1/1

     192.168.0.0/32 is subnetted, 5 subnets

C       192.168.0.1/32 is directly connected, Loopback0

D       192.168.0.2/32 [90/156160] via 10.0.0.2, 00:13:00, FastEthernet0/0

D       192.168.0.3/32 [90/158720] via 10.0.0.2, 00:13:00, FastEthernet0/0

D       192.168.0.4/32 [90/161280] via 10.0.0.2, 00:13:00, FastEthernet0/0

D       192.168.0.5/32 [90/386560] via 10.0.3.2, 00:01:36, FastEthernet1/1


42) Verify connectivity from PC1 to the loopback interface on R5.


Adjacencies and Passive Interfaces



43) Enter the command below to verify that R1 has established EIGRP adjacencies with R2 and R5.

R1#show ip eigrp neighbors 

EIGRP-IPv4 Neighbors for AS(100)

H Address Interface Hold Uptime SRTT RTO Q Seq

(sec) (ms) Cnt Num

1 10.0.3.2 Fa1/1 14 00:17:21 33 198 0 16

0 10.0.0.2 Fa0/0 11 00:19:21 36 216 0 32

R1#show ip eigrp neighbors

IP-EIGRP neighbors for process 100

H   Address         Interface      Hold Uptime    SRTT   RTO   Q   Seq

                                   (sec)          (ms)        Cnt  Num

0   10.0.0.2        Fa0/0          11   00:21:42  40     1000  0   22

1   10.0.3.2        Fa1/1          10   00:10:17  40     1000  0   29


44) Verify that traffic from R5 to the directly connected interfaces on R1 goes via the FastEthernet 0/1 interface.

R5#show ip route | begin Gate

Gateway of last resort is not set


     10.0.0.0/8 is variably subnetted, 12 subnets, 3 masks

S       10.0.0.0/16 [95/0] via 10.0.3.1

D       10.0.0.0/24 [90/261120] via 10.0.3.1, 00:12:21, FastEthernet0/1

D       10.0.1.0/24 [90/261120] via 10.0.3.1, 00:12:21, FastEthernet0/1

D       10.0.2.0/24 [90/261120] via 10.0.3.1, 00:12:21, FastEthernet0/1

C       10.0.3.0/24 is directly connected, FastEthernet0/1

L       10.0.3.2/32 is directly connected, FastEthernet0/1

S       10.1.0.0/16 [95/0] via 10.1.3.1

D       10.1.0.0/24 [90/263680] via 10.0.3.1, 00:12:21, FastEthernet0/1

                    [90/263680] via 10.1.3.1, 00:12:21, FastEthernet0/0

D       10.1.1.0/24 [90/261120] via 10.1.3.1, 00:12:21, FastEthernet0/0

D       10.1.2.0/24 [90/261120] via 10.1.3.1, 00:12:21, FastEthernet0/0

C       10.1.3.0/24 is directly connected, FastEthernet0/0

L       10.1.3.2/32 is directly connected, FastEthernet0/0

     192.168.0.0/32 is subnetted, 5 subnets

D       192.168.0.1/32 [90/386560] via 10.0.3.1, 00:12:21, FastEthernet0/1

D       192.168.0.2/32 [90/389120] via 10.0.3.1, 00:12:21, FastEthernet0/1

D       192.168.0.3/32 [90/389120] via 10.1.3.1, 00:12:21, FastEthernet0/0

D       192.168.0.4/32 [90/386560] via 10.1.3.1, 00:12:21, FastEthernet0/0

C       192.168.0.5/32 is directly connected, Loopback0


45) Enter the commands below to configure the loopback interface and the link to R5 as passive interfaces on R1.

R1(config-if)#router eigrp 100

R1(config-router)#passive-interface loopback0 

R1(config-router)#passive-interface fastethernet1/1

R1(config)#router eigrp 100

R1(config-router)#passive-interface loopback0

R1(config-router)#passive-interface fastEthernet1/1


46) What changes do you expect to see in the routing table on R5 and why?

Adjajency EIGRP antara R1 dan R5 akan down. Semua rute EIGRP via R1 akan dihilangkan dari routing table dan digantikan dengan rute via R4. Mengkonfigurasi interface loopback sebagai passive interface di R1 tidak akan mempengaruhi routing table.

R1(config-router)#

%DUAL-5-NBRCHANGE: IP-EIGRP 100: Neighbor 10.0.3.2 (FastEthernet1/1) is down: holding time expired


47) Verify the expected changes to the routing table on R5.

R5#show ip route | begin Gate

Gateway of last resort is not set


     10.0.0.0/8 is variably subnetted, 12 subnets, 3 masks

S       10.0.0.0/16 [95/0] via 10.0.3.1

D       10.0.0.0/24 [90/266240] via 10.1.3.1, 01:11:44, FastEthernet0/0

D       10.0.1.0/24 [90/268800] via 10.1.3.1, 01:11:44, FastEthernet0/0

D       10.0.2.0/24 [90/268800] via 10.1.3.1, 01:11:44, FastEthernet0/0

C       10.0.3.0/24 is directly connected, FastEthernet0/1

L       10.0.3.2/32 is directly connected, FastEthernet0/1

S       10.1.0.0/16 [95/0] via 10.1.3.1

D       10.1.0.0/24 [90/263680] via 10.1.3.1, 01:11:44, FastEthernet0/0

D       10.1.1.0/24 [90/261120] via 10.1.3.1, 01:11:44, FastEthernet0/0

D       10.1.2.0/24 [90/261120] via 10.1.3.1, 01:11:44, FastEthernet0/0

C       10.1.3.0/24 is directly connected, FastEthernet0/0

L       10.1.3.2/32 is directly connected, FastEthernet0/0

     192.168.0.0/32 is subnetted, 5 subnets

D       192.168.0.1/32 [90/394240] via 10.1.3.1, 01:11:44, FastEthernet0/0

D       192.168.0.2/32 [90/391680] via 10.1.3.1, 01:11:44, FastEthernet0/0

D       192.168.0.3/32 [90/389120] via 10.1.3.1, 01:11:44, FastEthernet0/0

D       192.168.0.4/32 [90/386560] via 10.1.3.1, 01:11:44, FastEthernet0/0

C       192.168.0.5/32 is directly connected, Loopback0


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