Network Troubleshooting and Design

This assignment delves into the crucial aspects of network troubleshooting and design. It begins by explaining the fundamentals of network diagrams, their importance in IT infrastructure management, and how to create detailed ones. The document further explores physical network designs across different floors, emphasizing the significance of floor-specific diagrams for efficient troubleshooting. It also covers essential software tools like Microsoft Visio used for network design visualization. Finally, it outlines basic troubleshooting procedures involving IP addresses, DNS servers, and network maps.

Network Troubleshooting with Network Diagram

Table of Contents
1. Introduction.........................................................................................................................................2
2. Basics of Network Diagram.................................................................................................................2
3. Detailed Network Diagram..................................................................................................................3
4. Physical Design in each floor..............................................................................................................4
5. Network Designing Software...............................................................................................................6
6. Basic Troubleshooting.........................................................................................................................6
7. Conclusion...........................................................................................................................................6
8. References...........................................................................................................................................7
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1. Introduction
Network troubleshooting is a difficult task in IT infrastructure management. Having a detailed
network diagram is a first and very important procedure in IT infrastructure management.
Here how to have a detailed network diagram and how to split the entire network diagram into
small segments are explained. This will be very helpful in troubleshooting any IT infrastructure
failure error. Basics of Network diagram will be studied. Detailed network design will be studied
with the help of detailed network diagram. Physical network design in each floor will studied
with the help of relevant diagrams. Network designing software details will be studied briefly.
Basic network troubleshooting procedure will be studied briefly.
2. Basics of Network Diagram
Any IT infrastructure will be having lot of devices ("Network design checklist: How to design a
LAN", 2017) like computers, IP Phones, Printers. These devices will be connected with switches
in LAN. All these switches will be connected with a main switch called core switch. This core
switch will be connected with router. The router connects the entire LAN with outside WAN.
Switch is a junction point that can connect multiple devices based on switching table. Router is a
routing device that guides the data from one network to another network based on routing tables.
All the devices are connected with each other using wireless media or wired media. 801.11n is
the governing wireless technology. Ethernet is the governing wired technology. In wired
technology each device will be having a NIC (Network Interface Card). LAN cables like Cat5,
Cat5e, Cat6 connects the NICs of two devices. The ends of the cables are crimped with RJ-45
connectors. These connectors are used to plug in the cables into the NICs of the network devices.
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Each network device will be configured with IP address. IP address is a logical address. Each
network device will be having host names. Human mind can understand and remember only host
names well. DNS is the IT infrastructure service that maps the host names with corresponding IP
addresses. Network design will be based on OSI layer system and TOP-Down approach will be
used in the network design (Oppenheimer, 2011). Any network design will start with end user
requirements.
3. Detailed Network Diagram
Detailed network diagram (Cisco Systems, 2017) ("Five Things to Be Considered in
Designing a Network", 2017) is shown below. The diagram is self-explanatory.
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4. Physical Design in each floor
Troubleshooting network issue should be done in a phased manner ("Five Things to Be
Considered in Designing a Network", 2017). Most of the universities, offices will be having
multiple floors. Having a separate physical design in each floor will be very useful in a quick
network troubleshooting. The following diagram shows the physical design of each floor.
4.1 First Floor Network Design Diagram
4.2 Second Floor Network Design Diagram
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4.3 Third Floor Network Design Diagram
4.4 Fourth Floor Network Design Diagram
5. Network Designing Software
Microsoft Visio ("Flowchart Maker & Diagramming Software, Microsoft Visio", 2017) is
mainly used for drawing network design diagrams. The LAN design drawn in Microsoft Visio is
attached below.
6. Basic Troubleshooting
Each network device will be configured with separate IP address ("Network Design &
Implementation | Network Planning | Systems Engineering", 2017). By referring the DNS server,
the physical name of the network device can be found out. By referring the main network design
diagram the location of the network device can be found out. By referring the corresponding
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floor network design diagram the faulty device will be found out. Suitable steps can be made to
troubleshoot or replace the faulty device.
7. Conclusion
Basics of Network diagram are studied. Detailed network design is studied with the help of
detailed network diagram. Physical network design in each floor is studied with the help of
relevant diagrams. Network designing software details is studied briefly. Basic network
troubleshooting procedure is studied briefly.
8. References
Cisco Systems, I. (2017). Introduction to Cisco Network Design > Designing Campus
Networks.Ciscopress.com. Retrieved 15 October 2017, from
http://www.ciscopress.com/articles/article.asp?p=25259
Five Things to Be Considered in Designing a Network. (2017). Smallbusiness.chron.com.
Retrieved 15 October 2017, from http://smallbusiness.chron.com/five-things-considered-
designing-network-35911.html
Flowchart Maker & Diagramming Software, Microsoft Visio. (2017). Products.office.com.
Retrieved 15 October 2017, from https://products.office.com/en-us/visio/flowchart-
software?tab=tabs-1
Network Design & Implementation | Network Planning | Systems Engineering. (2017). Systems
Engineering. Retrieved 15 October 2017, from https://www.syseng.com/it-consulting-
services/network-design-implementation/
Network design checklist: How to design a LAN. (2017). SearchITChannel. Retrieved 15
October 2017, from http://searchitchannel.techtarget.com/feature/Network-design-checklist-
Six-factors-to-consider-when-designing-LANs
Oppenheimer, P. (2011). Top-down network design. Indianapolis, Ind.: Cisco Press.
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