Day 2 - RIP Default Route - Redistribute Static Route

Dalam routing RIP, cara untuk melakukan injeksi default route (0.0.0.0/0) bisa dilakukan dengan 2 cara, yaitu :

1. Dengan command default-information originate
2. Dengan melakukan redistribute static default route

Untuk lab kali ini kita akan membahas bagaimana cara injeksi default route dengan menggunakan redistribute static default route.


Lab 12 - RIP Default Route - Redistribute Static Route

Topologi yang digunakan adalah sbb :

 

Skenario adalah pada router R2 akan melakukan injeksi default route ke RIP yang akan diterima pada R1 dan R3.


Konfigurasi R1 :

interface Loopback0
 ip address 1.1.1.1 255.255.255.255
!
interface FastEthernet0/0
 ip address 12.12.12.1 255.255.255.0
!
router rip
 version 2
 network 1.0.0.0
 network 12.0.0.0
 no auto-summary

Konfigurasi R2 :

interface Loopback0
 ip address 2.2.2.2 255.255.255.255
!
interface FastEthernet0/0
 ip address 12.12.12.2 255.255.255.0
!
interface FastEthernet0/1
 ip address 23.23.23.2 255.255.255.0
!
router rip
 version 2
 network 2.0.0.0
 network 12.0.0.0
 network 23.0.0.0
 no auto-summary

Konfigurasi R3 :

interface Loopback0
 ip address 3.3.3.3 255.255.255.255
!

interface Loopback1
 ip address 33.33.33.33 255.255.255.255
!
interface FastEthernet0/0
 ip address 23.23.23.3 255.255.255.0
!
router rip
 version 2
 network 3.0.0.0
 network 23.0.0.0
 no auto-summary

Kita cek dulu routing table di R1 untuk IP 33.33.33.33/32  :

R1#sh ip route 33.33.33.33
% Network not in table

R1#sh ip route
Gateway of last resort is not set

     1.0.0.0/32 is subnetted, 1 subnets
C       1.1.1.1 is directly connected, Loopback0
     2.0.0.0/32 is subnetted, 1 subnets
R       2.2.2.2 [120/1] via 12.12.12.2, 00:00:24, FastEthernet0/0
     3.0.0.0/32 is subnetted, 1 subnets
R       3.3.3.3 [120/2] via 12.12.12.2, 00:00:24, FastEthernet0/0
     23.0.0.0/24 is subnetted, 1 subnets
R       23.23.23.0 [120/1] via 12.12.12.2, 00:00:24, FastEthernet0/0
     12.0.0.0/24 is subnetted, 1 subnets
C       12.12.12.0 is directly connected, FastEthernet0/0


Terlihat bahwa di routing table R1, tidak mengenali IP 33.33.33.33/32.
Kita coba tambahkan konfigurasi pada R2, agar melakukan injeksi default-route dengan next-hop R3.
Sehingga dari R1 bisa nanti bisa mencapai IP 33.33.33.33/32.

R2(config)#ip route 0.0.0.0 0.0.0.0 23.23.23.3
R2(config)#router rip
R2(config-router)#redistribute static


Kemudian kita cek lagi routing table di R1 :


R1#sh ip route
Gateway of last resort is 12.12.12.2 to network 0.0.0.0

     1.0.0.0/32 is subnetted, 1 subnets
C       1.1.1.1 is directly connected, Loopback0
     2.0.0.0/32 is subnetted, 1 subnets
R       2.2.2.2 [120/1] via 12.12.12.2, 00:00:06, FastEthernet0/0
     3.0.0.0/32 is subnetted, 1 subnets
R       3.3.3.3 [120/2] via 12.12.12.2, 00:00:06, FastEthernet0/0
     23.0.0.0/24 is subnetted, 1 subnets
R       23.23.23.0 [120/1] via 12.12.12.2, 00:00:06, FastEthernet0/0
     12.0.0.0/24 is subnetted, 1 subnets
C       12.12.12.0 is directly connected, FastEthernet0/0
R*   0.0.0.0/0 [120/1] via 12.12.12.2, 00:00:07, FastEthernet0/0


Terlihat bahwa R1 sudah menerima default route dari routing RIP yang di injeksi dari R2.

Kita coba test ping dari R1 ke IP 33.33.33.33 :

R1#ping 33.33.33.33
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 33.33.33.33, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/39/60 ms

Yak, akhirnya R1 bisa mencapai IP 33.33.33.33, melalui default route yang didapat dari routing RIP :)