Lab 6.2.2 Determining the Number of IP Networks

Task 1: Review Address Block Size

Review and record the total number of hosts to be addressed.

Complete this table with the information determined in Lab 6.2.1.

Network/VLAN Name	#Number of host addresses
Default	14
Voice	254
Management	14
Administrative	62
Support	126
Production	126
Mobile	62
Peripherals	62
Net_admin	14
Web_access	14
Future	126
Null	126
Total	1000

What is the smallest address block size that can potentially satisfy the FilmCompany network needs? __ 1024

Task 2: Choose or Obtain an Address Block

Step 1: Choose public or private addresses?

A block of addresses needs to be acquired to support the addressing scheme. This block of addresses could be private space addresses or public addresses. In most cases, the network users require only outbound connections to the Internet. Only a few hosts, such as web servers, require public addresses. These often exist on the local LAN with private addresses and have static NAT entries on the border router to translate to public addresses. Public address, however, are expensive and often difficult to justify. Can you make a justification of the use public addresses in this network? ___ Tidak

If so, write this justification to forward to the ISP:

Step 2: Ensure that the private space addresses do not conflict

Although you are allowed to use private space addresses any way you choose, you must make sure that the addresses used do not conflict with another private space address to which this network will be connected. You must identify other networks to which you are connected and make sure that you are not using the same private addresses. In this case, you need to examine the addresses used by the StadiumCompany.

What address private space block does the StadiumCompany use?

_________172.18.0.0 /16

What address blocks are used by the WAN links?

_________172.18.0.16/30

_________192.0.2.40 /30

Are there other devices or connections that need to be excluded from use? ___ Ya

What types? _________ servers

What address block? ________172.17.0.0 /16

Step 3: Ensure that the private space addresses are consistent with policy

The company should have a network policy and method of allocating addresses. This is true even when using private addresses. You should contact the FilmCompany network administrators to request a block of addresses. In this case, ask your instructor if there is a preferred set of addresses to use.

Did your instructor assign a block of addresses?

If so, what block?

If your instructor does not assign addresses, you may choose any private space block that does not conflict.

What block of addresses are you using for this FilmCompany Branch? ________192.168.0.0 /22

Task 3: Allocate Addresses for the Network

When assigning addresses to the different networks, start the assignments with the subnet that requires the largest address block and progress to the network that requires the smallest.

Step 1: Order the networks from largest to smallest

Using the information from Lab 6.2.1, list the networks in order of size, from the network that requires the

largest address block to the network that requires the smallest block.

Network/VLAN Name	Number of host addresses
Voice	254
support	126
production	126
Future	126
Null	126
administrative	62
Mobile	62
peripherals	62
Web_access	14
Default	14
management	14
Net_admin	14

Step 2: Assign address blocks to the networks

From the address block chosen in the previous task, begin calculating and assigning the address blocks to these networks. You should use contiguous blocks of addresses when making these assignments.

Network/VLAN Name	Number of host addresses	Network address
Voice	254	192.168.0.0 /24
support	126	192.168.1.0 /25
production	126	192.168.1.128 /25
Future	126	192.168.2.0 /25
Null	126	192.168.2.128 /25
administrative	62	192.168.3.0 /26
Mobile	62	192.168.3.64 /26
Peripherals	62	192.168.3.128 /26
web_access	14	192.168.3.192 /28
Default	14	192.168.3.208 /28
management	14	192.168.3.224 /28
net_admin	14	192.168.3.240 /28

Step 3: Complete the address planning table

Using the addresses you calculated in the previous step, complete this table from Lab 6.2.1. This plan will be used in future labs.

VLAN #	Network/VLAN Name	Number of host addresses	Network Address	Description
1	default	14	192.168.3.208 /28	Default VLAN for the Layer 2 devices
10	voice	254	192.168.0.0 /24	Voice VLAN to support Voice over IP
20	management	14	192.168.3.224 /28	Management hosts and secure peripherals (payroll printer)
30	administrative	62	192.168.3.0 /26	Administrative hosts
40	support	126	192.168.1.0 /25	Support hosts
50	production	126	192.168.1.128 /25	High performance production workstations (stationary)
60	mobile	62	192.168.3.64 /26	Mobile production hosts.
70	net_admin	14	192.168.3.240 /28	Network support
80	servers	65534	172.17.0.0 /16	Servers to support video services and storage.
90	peripherals	62	192.168.3.128 /26	Peripherals for general use (printers, scanners)
100	web_access	14	192.168.3.192 /28	VLAN for server that are publicly accessible
120	future	126	192.168.2.0 /25	VLAN for future services
999	null	126	192.168.2.128 /25	VLAN for terminating unwanted or suspicious traffic
NA	NAT_pool	6	209.165.200.224/29	Addresses for NAT pool for BR4 or interface to ISP4
NA	DSL_Link	2	192.0.2.40 /30	DSL link to the ISP
NA	Frame_link	2	172.18.0.16/30	Address of the FR link to the stadium

Reflection / Challenge

This lab specifically used private IPv4 addresses. Discuss the issues to be considered if it was decided to use public IP addresses throughout the network. Are there any situations that would require this?

Alamat IP versi 4 (sering disebut dengan Alamat IPv4) adalah sebuah jenis pengalamatan jaringan yang digunakan di dalam protokol jaringan TCP/IP yang menggunakan protokol IP versi 4. Panjang totalnya adalah 32-bit, dan secara teoritis dapat mengalamati hingga 4 miliar host komputer atau lebih tepatnya 4.294.967.296 host di seluruh dunia, jumlah host tersebut didapatkan dari 256 (didapatkan dari 8 bit) dipangkat 4(karena terdapat 4 oktet) sehingga nilai maksimal dari alamt IP versi 4 tersebut adalah 255.255.255.255 dimana nilai dihitung dari nol sehingga nilai nilai host yang dapat ditampung adalah 256x256x256x256=4.294.967.296 host. Alamat publik adalah alamat-alamat yang telah ditetapkan oleh InterNIC dan berisi beberapa buahnetwork identifier yang telah dijamin unik (artinya, tidak ada dua host yang menggunakan alamat yang sama) jika intranet tersebut telah terhubung ke Internet. Ketika beberapa alamat publik telah ditetapkan, maka beberapa rute dapat diprogram ke dalam sebuahrouter sehingga lalu lintas data yang menuju alamat publik tersebut dapat mencapai lokasinya.