VLSM SUBNET

1.      IP  License adalah 172.17.0.0/16

Dibagi menjadi 5 buah subnet network yaitu dengan VLSM :

Misalkan pada network 1 : 200 PC  à router 1

Network 2 : 100 PC à router 1

Network  3 : 50 PC à router 2

Network 4 : 50 PC à router 2

Network 5 : 50 PC à router 2

Network 6 : subnet antar router 1 & 2

Cara perhitungannya adalah :

172.17.0.0/16 à         10101100 10101010 00000000 00000000

subnet              11111111 11111111 00000000 00000000

network 1 : 200 PC  à pangkat yang mendekati adalah 28 = 256

Subnet Name Needed Size Allocated Size Address Mask Dec Mask Assignable Range Broadcast
A 200 254 172.17.0.0 /24 255.255.255.0 172.17.0.1 – 172.17.0.254 172.17.0.255
B 100 126 172.17.1.0 /25 255.255.255.128 172.17.1.1 – 172.17.1.126 172.17.1.127
C 50 62 172.17.1.128 /26 255.255.255.192 172.17.1.129 – 172.17.1.190 172.17.1.191
D 50 62 172.17.1.192 /26 255.255.255.192 172.17.1.193 – 172.17.1.254 172.17.1.255
E 50 62 172.17.2.0 /26 255.255.255.192 172.17.2.1 – 172.17.2.62 172.17.2.63
F 2 2 172.17.2.64 /30 255.255.255.252 172.17.2.65 – 172.17.2.66 172.17.2.67

Dibagi menjadi 9 subnet network dengan mengurutkan mulai dari host terbesar sampai terkecil :

Needed Size Allocated Size Address Mask Dec Mask Assignable Range Broadcast
4000 4094 172.16.0.0 /20 255.255.240.0 172.16.0.1 – 172.16.15.254 172.16.15.255
2000 2046 172.16.16.0 /21 255.255.248.0 172.16.16.1 – 172.16.23.254 172.16.23.255
1000 1022 172.16.24.0 /22 255.255.252.0 172.16.24.1 – 172.16.27.254 172.16.27.255
200 254 172.16.28.0 /24 255.255.255.0 172.16.28.1 – 172.16.28.254 172.16.28.255
100 126 172.16.29.0 /25 255.255.255.128 172.16.29.1 – 172.16.29.126 172.16.29.127
50 62 172.16.29.128 /26 255.255.255.192 172.16.29.129 – 172.16.29.190 172.16.29.191
2 2 172.16.29.192 /30 255.255.255.252 172.16.29.193 – 172.16.29.194 172.16.29.195
2 2 172.16.29.196 /30 255.255.255.252 172.16.29.197 – 172.16.29.198 172.16.29.199
2 2 172.16.29.200 /30 255.255.255.252 172.16.29.201 – 172.16.29.202 172.16.29.203

Subnet mask dihitung berdasarkan jumlah host dalam tabel CIDR dengan rumus 2n

Gateway tiap subnet network adalah :

Network Gateway
172.16.0.0 172.16.0.1
172.16.16.0 172.16.16.1
172.16.24.0 172.16.24.1
172.16.28.0 172.16.28.1
172.16.29.0 172.16.29.0
172.16.29.128 172.16.29.129

TABEL ROUTING

Routeter Wasteville

Network Gateway
172.16.0.0 Directly connected
172.16.16.0 172.16.29.194
172.16.24.0 172.16.29.194
172.16.28.0 172.16.29.194
172.16.29.0 Direclty Connected
172.16.29.128 172.16.29.194
172.16.29.192 Direclty Connected
172.16.29.196 172.16.29.194
172.16.29.200 172.16.29.194
Network Gateway
172.16.0.0 172.16.29.193
172.16.16.0 172.16.29.198
172.16.24.0 172.16.29.198
172.16.28.0 172.16.29.198
172.16.29.0 172.16.29.193
172.16.29.128 Direclty Connected
172.16.29.192 Direclty Connected
172.16.29.196 Direclty Connected
172.16.29.200 172.16.29.198

Router 2

Network Gateway
172.16.0.0 172.16.29.201
172.16.16.0 Directly connected
172.16.24.0 Directly connected
172.16.28.0 172.16.29.201
172.16.29.0 172.16.29.201
172.16.29.128 172.16.29.201
172.16.29.192 172.16.29.201
172.16.29.196 172.16.29.201
172.16.29.200 Directly connected

Router 3

Network Gateway
172.16.0.0 172.16.29.197
172.16.16.0 172.16.29.202
172.16.24.0 172.16.29.202
172.16.28.0 Directly connected
172.16.29.0 172.16.29.197
172.16.29.128 172.16.29.197
172.16.29.192 172.16.29.197
172.16.29.196 Directly connected
172.16.29.200 Directly connected

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