Individual Route vs Summarized Route

cara konfigurasi :
ROUTER 1

Router>en
Router#conf tEnter configuration commands, one per line. End with CNTL/Z.
Router(config)#hostname R1-tina
R1-tina(config)#int fa0/0
R1-tina(config-if)#ip add 172.18.0.1 255.255.0.0
R1-tina(config-if)#no shut%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
R1-tina(config-if)#exit
R1-tina(config)#int fa0/1
R1-tina(config-if)#ip add 172.19.0.1 255.255.0.0
R1-tina(config-if)#no shut
%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up
R1-tina(config-if)#exitR1-tina(config)#int s0/0/0
R1-tina(config-if)#ip add 172.17.0.1 255.255.0.0
R1-tina(config-if)#clock rate 9600
R1-tina(config-if)#no shut
%LINK-5-CHANGED: Interface Serial0/0/0, changed state to down
R1-tina(config-if)#exitR1-tina(config)#ip route 172.16.0.0 255.255.0.0 172.17.0.0
R1-tina(config)#ip route 192.168.0.0 255.255.0.0 172.17.0.0
R1-tina(config)#ip route 10.1.0.0 255.255.0.0 172.17.0.0
R1-tina(config)#^Z
%SYS-5-CONFIG_I: Configured from console by console
R1-tina#wr mem
Building configuration...[OK]
R1-tina#

ROUTER 2

Router>enRouter#conf tEnter configuration commands, one per line. End with CNTL/Z.
Router(config)#ho
Router(config)#hostname R2-novi
R2-novi(config)#int f0/0R2-novi(config-if)#ip add 172.16.0.1 255.255.0.0
R2-novi(config-if)#no shut
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
R2-novi(config-if)#exit
R2-novi(config)#int s0/0/0
R2-novi(config-if)#ip add 172.17.0.2 255.255.0.0R2-novi(config-if)#exit
R2-novi(config)#R2-novi(config)#exitR2-novi(config)#ip add 172.17.0.2 255.255.0.0R2-novi(config)#int s0/0/01
R2-novi(config-if)#ip add 192.168.0.2255.255.0.0R2-novi(config-if)#clock rate 9600
R2-novi(config-if)#no shut

%LINK-5-CHANGED: Interface Serial0/0/1, changed state to down
R2-novi(config-if)#exit
R2-novi(config)#R2-novi(config)#interface Serial0/0/0R2-novi(config-if)#clock rate 9600
R2-novi(config-if)#
%LINK-5-CHANGED: Interface Serial0/0/0, changed state to upno shutdown
R2-novi(config-if)#%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0, changed state to up
R2-novi(config-if)#exit
R2-novi(config)#ip rouR2-novi(config)#ip route 172.18.0.0 255.255.0.0 172.17.0.0
R2-novi(config)#ip route 172.19.0.0 255.255.0.0 172.17.0.0
R2-novi(config)#ip route 10.1.0.0 255.255.0.0 192.168.0.0
R2-novi(config)#^Z
%SYS-5-CONFIG_I: Configured from console by console
R2-novi#wr memBuilding configuration...[OK]

ROUTER 3

Router>en
Router#conf t
Enter configuration commands, one per line. End with CNTL/Z.Router(config)#ho
Router(config)#hostname R3-lovaR3-lova(config)#int fa0/0
R3-lova(config-if)#ip add 10.1.0.1 255.255.0.0
R3-lova(config-if)#no shut
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
R3-lova(config-if)#exit
R3-lova(config)#int s0/0/1
R3-lova(config-if)#ip add 192.168.0.1 255.255.0.0
R3-lova(config-if)#no shut
%LINK-5-CHANGED: Interface Serial0/0/1, changed state to upR3-lova(config-if)#%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/1, changed state to up
R3-lova(config-if)#exit
R3-lova(config)#ip roR3-lova(config)#ip route 172.16.0.0 255.255.0.0 192.168.0.0
R3-lova(config)#^Z
%SYS-5-CONFIG_I: Configured from console by consoleR3-lova#wr mem
Building configuration...[OK]
R3-lova#

pembahasan dari router summary diatas :

<!--[if gte mso 9]> Normal 0 false false false IN X-NONE X-NONE

Menyederhanakan network menjadi single address dan subnet mask bisa dilakukan dengan tiga langkah. Lihatlah 4 network address berikut :

• 172.16.0.0/16
• 172.17.0.0/16
• 172.18.0.0/16
• 172.19.0.0/16
• 172.16.0.0 -> 10101100 00010000 00000000 00000000
  172.17.0.0 -> 10101100 00010001 00000000 00000000
  172.18.0.0 -> 10101100 00010010 00000000 00000000
  172.19.0.0 -> 10101100 00010011 00000000 00000000
  
• Langkah pertama adalah menampilkan biny format dari masing-masing network address
  
  Langkah kedua, hitung jumlah bit yang sama dari semua network address tersebut dimulai dari bit yang paling kiri.
• 
• menghitung jumlah bit yang cocok paling kiri untuk menentukan subnet mask. 14 bit yang cocok, /14 atau 255.252.0.0
  Anda bisa lihat bahwa ada 14 bit yang sama dari semua network address, jadi prefixnya adalah /14 atau 255.252.0.0
  Langkah ketiga adalah copy semuat bit yang sama dan kemudian tambahkan “bit 0” sampai dengan berjumlah 32 bit address. Maka ini kemudian dijadikan network address.
  
  Langkah ketiga, menyalin atau mengcopy bit yang cocok dan menambahkan nol bit untuk menentukan alamat jaringan
• 
  
• Gambar diatas menunjukkan bahwa keempat network 172.16.0.0 , 172.17.0.0 , 172.18.0.0 , 172.19.0.0 dapat di sederhanakan kedalam single network address dan profix 172.16.0.0/14.