STATIC DEFAULT ROUTE

Posted in
04.41



RBJ
Title
:
Static Default Route
Issue Date
:
23 Agustus 2016
Prepare By
:
Yada Aulia
Class
:
XII TKJ 2
Teacher
:
Suyatno, S.Kom

SMK AL-BAHRI KOTA BEKASI




STATIC DEFAULT ROUTE
TOPOLOGI



Tabel Addressing
Device
Interface
IP Address
Subnet Mask
Derfault Gateway
R1
Fa0/0
192.168.1.254
255.255.255.0
N/A

Fa0/1
12.12.12.1
255.255.255.0
N/A

Lo1
172.16.1.1
255.255.255.0
N/A

Lo2
172.16.2.2
255.255.255.0
N/A
R2
Fa0/0
192.168.2.254
255.255.255.0
N/A

Fa0/1
12.12.12.2
255.255.255.0
N/A

Lo3
172.16.3.3
255.255.255.0
N/A

Lo4
172.16.4.4
255.255.255.0
N/A
S1
N/A
VLAN 1
N/A
N/A
S2
N/A
VLAN 1
N/A
N/A
Laptop1
NIC
192.168.1.1
255.255.255.0
192.168.1.254
Laptop2
NIC
192.168.2.1
255.255.255.0
192.168.2.254


Tujuan
Setting static default route

Konsep Dasar
Static default route adalah static route dengan network address destination 0.0.0.0 dan subnet
mask 0.0.0.0. Dikenal juga sebagai “quad zero” route. Static default route melakukan identifikasi
gateway yang akan digunakan oleh router untuk mengirimkan semua paket IP untuk network
destination yang tidak diketahui di routing table, sehingga akan diforward ke route 0.0.0.0/0.
 
Untuk konfigurasi static default route dapat menggunakan next-hop ip address atau exit-interface.

Router(config)# ip route 0.0.0.0 0.0.0.0 (ip-address or exit-intf)

Static default route:
  • Default route dapat digunakan ketika network destination tidak diketahui (Internet)
  • Default route dapat digunakan ketika hanya ada satu jalur keluar untuk semua network
    destination
  •  Dapat mengurangi ukuran routing table
  • Jika router tidak menemukan entry network destination di routing table, maka router akan memforward paket ke default route
  •  Menjadi route pilihan terakhir di routing table

Konfigurasi R1

Router>enable
Router#configure terminal 
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#int fa0/0
Router(config)#ip address 192.168.1.254 255.255.255.0
Router(config)#no shut
Router(config-if)#
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
Router(config-if)#int fa0/1
Router(config-if)#ip address 12.12.12.1 255.255.255.0
Router(config-if)#no shut

Router(config-if)#
%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up

Router(config-if)#int lo1

Router(config-if)#
%LINK-5-CHANGED: Interface Loopback3, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback3, changed state to up

Router(config-if)#ip address 172.16.1.1 255.255.255.0
Router(config-if)#int lo2

Router(config-if)#
%LINK-5-CHANGED: Interface Loopback4, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback4, changed state to up

Router(config-if)#ip address 172.16.2.2 255.255.255.0
Router(config-if)#exit
Router(config)#ip route 0.0.0.0 0.0.0.0 12.12.12.1
Router(config)#exit
Router#
%SYS-5-CONFIG_I: Configured from console by console

Router#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is 0.0.0.0 to network 0.0.0.0

     12.0.0.0/24 is subnetted, 1 subnets
C       12.12.12.0 is directly connected, FastEthernet0/1
     172.16.0.0/24 is subnetted, 2 subnets
C       172.16.3.0 is directly connected, Loopback3
C       172.16.4.0 is directly connected, Loopback4
C    192.168.2.0/24 is directly connected, FastEthernet0/0
S*   0.0.0.0/0 [1/0] via 12.12.12.1
               is directly connected, FastEthernet0/1

Konfigurasi R2

Router>enable
Router#configure terminal 
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#int fa0/0
Router(config)#ip address 192.168.2.254 255.255.255.0
Router(config)#no shut
Router(config-if)#
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
Router(config-if)#int fa0/1
Router(config-if)#ip address 12.12.12.2 255.255.255.0
Router(config-if)#no shut

Router(config-if)#
%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up

Router(config-if)#int lo3

Router(config-if)#
%LINK-5-CHANGED: Interface Loopback3, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback3, changed state to up

Router(config-if)#ip address 172.16.3.3 255.255.255.0
Router(config-if)#int lo4

Router(config-if)#
%LINK-5-CHANGED: Interface Loopback4, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback4, changed state to up

Router(config-if)#ip address 172.16.4.4 255.255.255.0
Router(config-if)#exit
Router(config)#ip route 0.0.0.0 0.0.0.0 12.12.12.1
Router(config)#exit
Router#
%SYS-5-CONFIG_I: Configured from console by console

Router#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is 0.0.0.0 to network 0.0.0.0

     12.0.0.0/24 is subnetted, 1 subnets
C       12.12.12.0 is directly connected, FastEthernet0/1
     172.16.0.0/24 is subnetted, 2 subnets
C       172.16.3.0 is directly connected, Loopback3
C       172.16.4.0 is directly connected, Loopback4
C    192.168.2.0/24 is directly connected, FastEthernet0/0
S*   0.0.0.0/0 [1/0] via 12.12.12.1
               is directly connected, FastEthernet0/1

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