Class Project —NETW208
WAN/NETWORK Design Project
Comprehensive Group Project: Widget Corporation Network
This case study is of a small- to mid-sized network. In this project you will evaluate the
existing network and, based on findings and customer requirements, propose a new
Project General Information
You are going to be working in groups of two minimum and no more than three. You are
to start this project in Week 1 by contacting your fellow students through the Week 1
Discussion topic setup for this purpose and choosing the members of your team. Once
you have your team in place, post your group name and members to the threaded
discussion topic provided for that purpose. Should you not be a member of a group by the
end of Week 1, the instructor will create and/or assign people to groups.
Scenario: Widget Corporation Network Redesign
This project involves redesigning the network infrastructure of Widget Corporation, a
fictitious architectural company that designs medium to large office building in Canada,
United States, and other industrial countries.
The company has provided you with a short description of its current situation and future
plans. As a network designer, it is your task to identify the customer requirements that
allow you to provide the most effective solution.
Widget Corporation, a leading architectural firm, headquartered in Toronto, Canada and
offices around the world. Demand for the company’s products is constantly increasing;
therefore, the company must tighten the integration of its customers and partners into its
The company employs approximately 300 people across 10 sites. These sites are located
globally and vary in size from a single part-time person working from a small
office/home office (SOHO) to 150 regular office staff. The company’s headquarters
consists of a building that contains approximately 150 employees. The headquarters also
houses four major departments—Design, Human Resources, Marketing, and Sales.
The company has one international office (Canada) and many remote offices in each
country where it is present. All large remote offices (those that have more than five
employees) within each country are permanently connected to the international office,
while smaller offices (those with fewer than five employees) are connected on-demand
via integrated services digital network (ISDN). Each international office provides
connectivity to the headquarters for all sites within that country.
Most of the time, the employees use universal software that converts all the company’s
business workflows and runs on a mainframe. The e-mail server runs on a separate
Widgets WAN is a typical hierarchical, three-tier aggregation network that uses serial
lines. The links vary from low bandwidth (64 kbps to 128 kbps) between the large remote
offices and the international office to higher bandwidth (up to 2 Mbps) between the
international offices and the headquarters. All remote locations that have more than five
employees are layer 2 switched, while smaller locations use Ethernet hubs.
The current network does not provide any redundancy or backup strategy. Therefore, in
the event of link or network equipment failure, the employees cannot perform their daily
work; this results in lower productivity.
Internet connectivity with the maximum throughput of 1 Mbps is provided via a central
firewall that is located next to the mainframe.
All internal servers (e-commerce, CAD, e-mail, and so on) are located at the
headquarters. Usually (approximately 85% of the time), architects, engineers, and
employees are accessing these servers; the remainder of the traffic is from the Internet.
Architects and engineers use CAD software and computers to design and redesign new
and current buildings.
The current infrastructure contains three 6500 Catalyst switches connected using layer 2
links. Building access switches, WAN routers, Internet firewalls, the mainframe, and
Windows servers all connect to 6,500 switches. Some fast Ethernet hubs are used in the
network. Currently, no redundancy is implemented in the LAN.
Architects, engineers and users repeatedly report low response times and the IT manager
mentions that they experience sporadic network outages several times during the day.
Furthermore, the average WAN utilization between the headquarters and the international
offices is approximately 40% and rarely exceeds 90%. The WAN utilization between
international offices and the remote offices is even lower and does not seem to be the
issue. The administrators are concerned about this problem and believe that it must be
The network is IP-based and uses EIGRP as the routing protocol. One Class C network
from the range 192.168.x.x is allocated to each LAN and WAN link. In locations where
more than 252 IP addresses are required, an additional Class C network is added. Route
summarization is not implemented on any router. Connections to small remote offices
with ISDN connections are implemented with static routes that are redistributed into the
routing protocol at the international offices.
The data traffic is predominantly CAD files, HTTP, and e-mail because the company has
implemented an intranet. In addition, the company has entered into a partnership to
design a new Corporate Headquarters building for an American Software company that
will require it to send CAD files of the new building electronically to their new American
client. These CAD files must be secure and free from competitors hacking them.
Plans and Requirements
The company urgently needs to resolve the low response time issue and is open to any
The following are things that Widget Corporation would like to accomplish with its
To minimize investment costs, the company would like to include redundancy
while retaining the existing equipment if possible. Redundancy should be
implemented in the headquarters’ LAN and on all WAN links.
The company is aware of potential business risks that periodic network outages
might cause during the solution implementation.
The company would like to optimize its IP addressing because it understands the
disadvantages of its network’s current IP addressing scheme.
The company would like a scalable and manageable solution that would allow for
expansion to new markets by simply adding new remote locations to the system.
The company would like to separate the four departments in the headquarters
campus and possibly deploy security policies among them in the future.
The company wants to go to VoIP for its phone service and to better utilize its
network. However, it is not sure if its existing network could handle the voice
traffic or what equipment upgrades it would need.
The company wants to offer extranet functionality to its new American client that
is fast and secure. It’s considering various connections options for its American
client but is not sure which solution would be best and cost efficient. The
company wants to provide secure and invulnerable access to its external servers,
which should be separated from the internal servers. The internal mainframe
should securely upland and download the data from the external server. This
solution must be universal, regardless of what connectivity option the parties
choose. They want you to determine if using the Internet and a Site-to-Site IPSec
VPN to connect to their new American client is a workable solution.
The company has remote users who travel that must be able to attach remotely to
the corporate headquarters.
The company wants to implement SNMP to monitor network behavior and
particular implement syslog for logging computer and network device messages.
The company wants to redesign it system and data backup policy to provide
increased data redundancy and reduce downtime from a system failure.
Exercise: Propose Your Network Redesign
The following sections are intended to guide you through this customer’s network
1. Propose a campus redesign that solves the current problems reported by the
architects, engineers and users. Consider redundancy when redesigning the LAN.
Write an overview of your redesign and articulate why you selected that solution.
Use the Internet and any other resources to help with this redesign. Cite your
sources in a reference page.
2. WAN Backup Design
• Propose a WAN backup design to improve network reliability. Write an
overview of your design and articulate why you selected that solution.
IP Address Redesign
3. Propose an IP addressing redesign that optimizes IP addressing and IP routing
(Including the use of IP address summarization). Write an overview of your
redesign and articulate why you selected that solution.
Routing Campus Redesign
4. If the existing routing protocol does not fulfill all the requirements, propose a new
one to meet the customer’s needs. If a new routing protocol is not required,
outline any modifications that are required for the existing routing protocol.
Write an overview of your redesign and articulate why you selected that solution.
American Client WAN Connection Design
5. Propose a WAN design that will enable secure access to the internal servers for
Widget Corporation and its new American customer. This connection must allow
for the secure and timely transfer of the large CAD files that need to be transferred
back and forth. You must consider using the Internet and a Site-to-Site IPSec VPN,
but if you choose to go with a different solution you must justify your choice and
explain why the Site-to-Site IPSec VPN would not work.
6. Propose a solution for allowing remote users to reliably and securely connect to the
corporate network while on the road.
Monitoring the Network
7. Explain how using syslog would be capable of logging all computer and network
device generated messages and why having this information would be beneficial.
Group Project Report
The body of the report for this project must be a minimum of five pages in length, but can be as
long as you wish to make it. All seven elements listed previously must be included in the body of
the report. The paper is to contain a title page, table of contents, and reference page, none of
which are part of the five pages minimum required for the body of the report.
Even if your group decides not to go with a Site-to-Site IPSec VPN as the means of connecting to
the new American client for Widget Corporation, include the commands one could use to setup
such a connection (refer to the lab from Week 5). You must also include the commands one
would use to setup syslog on a network (refer to the lab from Week 6).
There needs to be a section in the report where it clearly indicates the student’s name, the
hours that student spent on the project, and exactly what it is they did. It is not to contain
a generic research as what a student spent time working on. It must indicate how many
hours they spent on research, what exactly they researched and what they did with the
research they gathered as well as any other activities they engaged in. This section is also
not part of the body of the report that has to be a minimum of five pages in length.
If your suggested solution requires the purchase of any new equipment on the part of
Widget Corporation, then a cost breakdown must be included that indicates how much
this new equipment will cost. While all costs will be approximations, whatever costs you
find from researching equipment will suffice.
The report is to use APA format. The report is due at the end of the seventh week (Week 7).
If you have any questions, post or e-mail them to your instructor.
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