IP addressing scheme

This IP addressing design coursework is intended to develop your understanding of the structure of IP addresses, the role of subnet and supernet masks, how a suitable public IP addressing scheme might be designed for an enterprise, and how this is subsequently used to assign IP addresses to subnets as well as hosts.

Requirement

An enterprise wishes to develop a public IP addressing scheme to allow it to connect to the Internet. Using the company specification and the physical network design given overleaf, develop a suitable fixed-length subnet mask IP addressing scheme and assign addresses to all your subnets and router connections i.e. the routers’ points of attachment. Your answer should contain (i) a clear description of the methodology you have followed (ii) the subnet and supernet masks that arise from your design, and (iii) a list of the subnet and router IP addresses you have created. (Make sure you clearly identify to which subnets and routers these are assigned.) The network address assigned to your company is 150.200.48.0.

Additional Points

-        Note that there is not necessarily a single correct answer.

-        Although this coursework specifies a fixed-length subnet mask IP addressing scheme, you may wish to submit an additional variable-length subnet mask IP addressing scheme. Additional marks can be gained in this way. The requirement, however, is for a fixed length.)

-        If you feel any of the specification below is ambiguous or unclear, feel free to make any sensible assumptions – though remember to write down these assumptions in your report.

-        There are no specific length or word count requirements. However please note the marking criteria listed below.

Marking

The marking scheme will be based on the following criteria:

IP Addressing Scheme

-        30% Subnet and supernet masks

Presentation

-        35% Text that describes your methodology and justifies decisions made.

Assignment of Addresses

-        15% Subnet addresses

-        20% Router addresses

Specification

Blupa Healthcare Ltd has three geographically distant sites. The main administrative centre is in London while the two hospitals are located in Manchester and Glasgow. The Manchester and Glasgow sites have been connected to London by leased lines. All medical records, web pages and e-mail are stored on a central server located at London.

The London building has three floors. The Management suite, the Accounts department and the Advertising team are each housed on a separate floor. Management (the top floor) is divided into a dozen offices. Accounts have 50 administrative staff, while the Advertising team is 120 strong. Each of these employees has a PC. All workgroups use switched-Ethernet linked to a common ATM backbone.

The Manchester hospital has a small Administration building with 40 PCs, each used by an administrator. Forty more PCs or other networked medical devices are used by the doctors and nurses spread between two similar-sized wards. The small Glasgow hospital is located in a single building. It employs 20 people, each with their own PC.