13.10. Sample Network Configurations

Next, we'll look at a few sample network configurations to show how the configuration rules work in the real world. The 10 Mbps examples will be the most complex, since the 10 Mbps system has the most complex set of segments and timing rules. Following that we will show a single example for the 100 Mbps system, since the configuration rules are much simpler for Fast Ethernet. There is no need for a Gigabit Ethernet example, as the configuration rules are extremely simple, allowing for only a single repeater hub. In addition, all Gigabit Ethernet equipment being sold today only supports full-duplex mode, which means there are no half-duplex Gigabit Ethernet systems.

13.10.1. Simple 10 Mbps Model 2 Configuration

Let's look at how the 10 Mbps Model 2 calculations work with a very simple example first. Figure 13.7 shows a network with three 10BASE-FL segments connected to a fiber optic repeater. Two of the segments are 2 km (2,000 m) in length, and one is 1.5 km in length.