User manual D-LINK DES-818

[. . . ] 02 (Aug. , 1997) 6DES810. . . 02 Printed In Taiwan RECYCLABLE Wichtige Sicherheitshinweise 1. Um eine Beschädigung des Gerätes zu vermeiden sollten Sie nur Zubehörteile verwenden, die vom Hersteller zugelassen sind. Verwenden Sie nur sichere Standorte und beachten Sie die Aufstellhinweise des Herstellers. Die Belüftungsöffnungen dienen zur Luftzirkulation die das Gerät vor Überhitzung schützt. [. . . ] These translations are necessary when connecting various network media to the same collision domain, such as when combining two wire-pair 100BASE-TX media with four wire-pair 100BASE-T4 media. Only one Class I hub can exist within the same collision domain, thus this type of hub cannot be cascaded. A Class II repeater, on the other hand, immediately repeats all incoming line signals on one port to the other ports; no translations are performed. This type of hub connects identical media to the same collision domain; for example, TX to TX. At most, two Class II hubs can exist within the same collision domain. The cable used to cascade these hubs is called an inter-repeater link (IRL). As mentioned earlier, stackable hubs can be used to increase the number of available nodes in a collision domain. An entire hub stack counts as a single repeater. Connectivity Rules · The maximum length of a twisted-pair segment (that is, distance between a port in the hub to a single-address network device such as a PC, server, or LAN switch) is 100 meters. The maximum diameter in a collision domain is about 205 meters using two Class II hubs (or hub stacks) and 200 meters using one Class I hub. Between any two end-stations in a collision domain, there may be up to three segments and two Class II hubs or two segments and one Class I hub. · · 4 Overview 10/100 Fast Ethernet Switch User's Guide Switching Technology Switching is fast becoming the industry standard for pushing the limits of existing Ethernet networks. A switch bridges Ethernet packets between Ethernet and Fast Ethernet LAN segments at the MAC address level of the Ethernet protocol. The difference between switched Ethernet (10Mbps, 100Mbps, or both) and traditional Ethernet is analogous to the difference between a private phone line and a party line. With switched Ethernet, each workgroup has a "private line" so that transmitted packets don't have to wait as long to gain access to the network. When connected to a switched port, each Ethernet segment has full "wire-speed" access, so a switch effectively divides a single Ethernet LAN into bridged multiple LAN segments. Each segment can support a workgroup or even provide a dedicated connection for a key workstation or server. The result of dividing an Ethernet LAN into multiple segments is a multiplication of internal bandwidth available to all stations on the LAN and a reduction in latency rates during peak-use periods. Benefits of Switching Ethernet switching technology drastically increases the total bandwidth of a LAN. It also provides configuration flexibility to local workgroups which allows the network administrator to better control how network resources are distributed against network load. Switching helps reduce the congestion problems inherent in the contention-oriented CSMA/CD protocol, thereby improving network response during high utilization periods. Also, currently popular distributed client/server applications often require higher bandwidth and tighter client-to-server integration. Legacy 10Mbps Ethernet often is unable to provide a sufficiently sophisticated platform for users to be able to take full advantage of such client/server applications. Fast Ethernet switching not only satisfies both technical and business needs, it also preserves the current investment in the huge 10BASE-T Ethernet Overview 5 installed base. Compatibility with 10Mbps Ethernet ensures that users will be able to migrate to Fast Ethernet at a pace appropriate to their installation and needs. 10/100 Switching Technology An integral extension of Fast Ethernet, 10/100 switching provides not only a 100Mbps high-speed connection for carrying aggregated 10Mbps traffic, it also handles the necessary conversion of MAC between 10BASE-T and 100BASE-TX. [. . . ] Set the duplex mode through the duplex mode switch at the rear of the device. To set a port to full-duplex operation, slide the corresponding duplex Installation 17 switch up. To set either or both ports 1 and 2 to auto duplex mode detect, set the corresponding switch down. Figure 6 Setting the Duplex Mode Note: Full-duplex mode can only be used for connections to other switches, network servers, or network stations. Connections to hubs must use half-duplex mode only. Network Configuration Examples This section provides sample configurations showing ways you might use the 10/100 Fast Ethernet Switch. 18 Installation 10/100 Fast Ethernet Switch User's Guide LAN Microsegmentation Perhaps the principal purpose for the 10/100 Fast Ethernet Switch is to microsegment an existing LAN to improve network latency rates and increase overall performance. [. . . ]