ISP and Customer Network Design Report
Introduction
You are required to write a report to the directors of a newly formed ISP known as ACMEISP. Their priority is to
implement an overlay network, initially capable of securely handling the voice / data applications for two major
customers initially known as Company A and Company B respectively, shown in figure 1 below. The directors of ACMEISP have
asked for you to report on possible technological solutions for the implementation of their core network.
The first issue is the selection of a suitable internal routing protocol capable of handling large quantities of both TCP
and UDP traffic. The second issue for consideration is the selection of a technical solution for the ISP infrastructure
which should be selected from the technologies you have studied within the module (MPLS or ATM). The communications for
the initial two companies are initially inter-site only (VPN), with the exception of email and Web service. This
indicates that security and quality of service is of high importance and the technologies being discussed must be able to
transfer the data between one company’s sites without interference from the other company’s data. Another important issue
is the transfer of real time data such as voice and IPTV internally between sites without the loss of fidelity.
In the first part of the report you are requested to discuss and analyse the operation of possible infrastructure
technologies and routing protocols that can be implemented in the core ACMEISP network stating the advantages and
disadvantages of your chosen technologies culminating in a firm and qualified choice of implementation.
The ISP’s customer Company A has two high profile converged networks with a requirement to communicate in the form of a
virtual private network. Company A has a public class C network address of 195.10.10.0/24, and utilises an internal
private class B addressing scheme of 172.16.0.0/16. It is decided that Company A site 1 will initially be given the
private address range starting with the sub-network 172.16.1.0/24 (other sub-networks in ascending order can be
utilised). You are requested to construct a variable length sub-netting scheme (VSLM) for Company A site 1 as shown in
Figure 2. Also you are required to discuss how internal private addressing can be transferred to the external network
ensuring that no private addresses leave the network. The managing director of company A also wishes you to suggest a
suitable scalable routing protocol for the network giving reasons for your choice.
The next part of the report concerns the secure transmission of applications between the sites. You are to select an
appropriate access method from each site to the ISP utilising secure WAN Technologies and describe how the chosen
technology can route traffic from one site to another securely via a VPN as in the diagram on the next page figure 3.
The directors of ISP ACMEISP also require you to analyse within the report its customer requirements to implement a
secure converged voice, video / data network, this includes the requirement to securely access the ISP internet services.
There is also a need for outside users to have access to the sites e-mail and WWW server but not to any other services.
You need to improve on the network shown in figure 4 on the next page. On behalf of their customer base you are required
to discuss the implementation of the following.
1. The implementation of a converged network discussing your choice of equipment, signalling and codecs.
2. Discuss any security issues may occur from the previous discussions concerning the network and also from the
following diagram (figure 4) you should discuss the use of access lists ACLs. Produce a diagram of your secure
implementation
3. Discuss Quality of service issues within the ISP which could affect the transmission and quality of voice / video
applications and suggest possible remedies in terms of QOS appropriate to your chosen technology for the ACMEISP core
network.
Finally you must ensure your report contains a short introduction and concise conclusion and must be of approximately
6000 words
Information can be gained from Cisco.com, Juniper.com or any CCNA/CCNP publications
Finally you must ensure your report contains a short introduction and concise conclusion and must be of approximately
6000 words excluding diagrams and associated comments.
Information can be gained from Cisco.com, Juniper.com or any CCNA/CCNP publications and suitable research papers. Also
please consult the assessment criteria given on the next page to ensure you have covered all the requirements.
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