Ethernet Networking- P10

Ethernet Networking- P10:One of the biggest problems when discussing networking is knowing whereto start. The subject of computer networks is one of those areas for whichyou have to "know everything to do anything." Usually, the easiest way toease into the topic is to begin with some basic networking terminology andthen look at exactly what it means when we use the word Ethernet.
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Ethernet Networking- P10258 Network Design and Simulation SoftwareFigure 11-6: Vendor-specific devices in the icon well One of the most important parts of a network device are its ports. Device properties therefore include a separate listing of all ports supplied with or added to a device, as in Figure 11-10. Each port can then be configured in- dividually (see Figure 11-11). ConceptDraw doesnt include predefined device properties sheets. Howev- er, you can define any number of custom properties to apply to specific device icons. For example, in Figure 11-12 you can see the setup for the custom properties of a network interconnection device. The definitions produce the dialog box in Figure 11-13. Once defined and given values, custom properties are accessible to ConceptDraws programming lan- guage and can therefore be included in any variety of reports, including network inventories and bills of materials.The Network Hierarchy 259 Figure 11-7 ConceptDrawimage libraries palette Figure 11-8 Generaldevice properties260 Network Design and Simulation Software Figure 11-9: Price/support properties Figure 11-10: Device port listThe Network Hierarchy 261 Figure 11-1 l Port properties Figure 11-12: Creating custom properties262 Network Design and Simulation Software Figure 11-13: A dialog box for entering custom property valuesCustom-Built Icons NetCrackers Device Factory lets you create devices that do not appear in the database. For example, NetCracker 1.5, the version from which the ex- amples in this chapter were taken, did not include any Gigabit Ethernet NICs. However, the network needed those devices in its servers. The Device Factory is actually a Windows Wizard that takes you through the process of configuring a new device. For the Gigabit Ethernet NIC, you would begin by choosing the type of device (Figure 11-14) and then giving the custom device a name (Figure 11-15). This name will be used to iden- tify the device in a database of user-created devices. The new device can therefore be used as often as needed in the network design. What happens after a device is named depends on the type of device. In the case of a NIC, the only other configuration necessary is the type of bus in which the card will fit (see Figure 11-16). If, however, you are creating a PC or workstation, you will need to specify ports, hard drives, removable media drives, RAM, and so on. Because ConceptDraw doesnt attach custom property sheets to images by default, you can use a variety of the programs genetic drawing shapes to create icons for devices that dont appear in the libraries. If you have a cus- tom icon that you need to use repeatedly, you can add it to an appropriate library to make it accessible throughout the program.The Network Hierarchy 263 Figure 11-14: Choosing the general type for a custom device Figure 11-15: Giving a custom device a nameLinking Network Devices Because NetCracker is basically container-oriented, it uses a method for setting up links between network devices that is somewhat different from that of ConceptDraw. To establish links between NetCracker network de- vices, you click on a pair of devices to be linked with a linking tool. If the264 Network Design and Simulation Software Figure 11-16: Choosing bus types for a custom NIC two devices are within the same container, then the process is simple You click twice and then configure the link. However, if the two devices are in different l o c a t i o n s ~ s u c h as a workstation in a specific room and a switch in a wiring c l o s e t ~ t h e n linking is a four-step process: Click on the containers in which the devices to be linked are found. The software draws a dashed line between the containers to indicate that there is an incomplete link (Figure 11-17). Figure 11-17 Linking containersThe Network Hierarchy 265 2. Open one of the containers. You will see a small square that represents the link. Click on the square and the device being linked with the link- ing tool. Because the link is still incomplete, the line between the square and the device is dashed (Figure 11-18). 3. Open the second container. Click on the square representing the link and the device being linked with the linking tool. 4. The Link Assistant dialog box appears (Figure 11-19). The software chooses a pair of compatible ports for the link. If there are other com- patible ports, you can change the selection. Then you click the Link button and close the dialog box. Because the link is complete, all lines representing the link are now solid, as in Figure ...