The rest of this paper will discuss why we have made these choices. First we will talk about why we have used a C class network. Second we will discuss why we have reserved the first 20 IP addresses as static and left the rest set to DDCD. Third we will discuss the extended star topology and why we have chosen that over another. Fourth we will discuss why we are not using multiple Plans for this small office network. This network configuration will use an extended star topology with 2 Catalyst 2960 Plus ETC-S Switches to segment the network into two Plans.
This will support 2 network printers and 45 employees. These catalyst series switches will support up to 8192 MAC address allowing our network to grow as more network devices and employees are added. To enhance our network performance the topology will be micro segmented to eliminate the possibilities of collisions and allow the network to operate at full duplex communications. Each device on a micro switched LANA has a point to point connection and hosts will have dedicated paths between senders and receivers, this will effectively double the bandwidth on our network.
As mentioned we will have 20 static IP addresses and we will use two of them for our printers one will be setup for each of our offices as shown in the diagram. The rest of the static Pips can be used for Email senders, FTP servers and any applications that are needed to be used on a specific port then you need a static IP for each. The work stations for the employees will not need to be static because they do not have the same type of demands that the servers have so they can be setup with the dynamic IP addresses and we will start with 192. 168. 0/24 within range will be 192. 680. 0 through 192. 168. 255. 55 we will get more than enough hosts with the 124 subnet mask and then some for growth. We are using 2 Catalyst 2960-Pious ETC-S Switches for future growth and scalability. Next we will go over the type of topology that we used and why. Using a star topology has its share of positive and negative attributes. The star topology is the easiest topology to setup and to maintain. This alone means setup costs are significantly lower than other topologies. The star topology can also be the easiest to troubleshoot. When an issue occurs the problem can be traced back to the central connecting device, in this specific case a router.
Any issue with a device connected to the central point does not affect the other connected devices. When a new device is connected to the network, it does not affect the status of the network. The biggest disadvantage of a star topology is the central connecting point, in this case the router. If the router goes down it affects all of the connected devices. The size of the network is directly affected by the capacity of the central connecting device. The efficiency of the network is also directly effected by the central connecting device.
If one device on the network is using a large portion of the bandwidth it will affect the other devices connected to the same central connection point. Knowing all of the advantages and disadvantages of the star topology gives the network manager a clear understanding of what is required to keep the network up and running to the fullest efficiency possible. Although the most important use of Plans is management, we have decided to have both floors be in a centralized distribution area with high quality switches, UPS (uninterrupted rower supply) and router.
In our office both floors need to interact with each other. Plans are a way of combining computers and hosts via a subnet. Since hosts that are members of a particular PLAN can talk to one another, this PLAN grouping provides an inherent security. However, to get hosts from different Plans to talk to each Other, we would need to setup inter-PLAN routing. In doing this, it would make the security point of a PLAN debatable. Furthermore, there are administrative costs with PLANS and we ultimately want to keep it simple. We will have a domain controller on our file server.