User manual ZYXEL ES-1016A

[. . . ] Dimension ES-1016A/ES-1024A Unmanaged 16/24-Port Ethernet Switch User's Guide Version 1. 0 April 2004 Dimension ES-1016A/ES-1024A Ethernet Switch Copyright Copyright © 2004 by ZyXEL Communications Corporation The contents of this publication may not be reproduced in any part or as a whole, transcribed, stored in a retrieval system, translated into any language, or transmitted in any form or by any means, electronic, mechanical, magnetic, optical, chemical, photocopying, manual, or otherwise, without the prior written permission of ZyXEL Communications Corporation. Published by ZyXEL Communications Corporation. All rights reserved. Disclaimer ZyXEL does not assume any liability arising out of the application or use of any products, or software described herein. Neither does it convey any license under its patent rights nor the patents rights of others. [. . . ] This improves network efficiency and performance by giving higher priority to outgoing traffic. For example, the lower queue has a priority value in the range of zero to three and the higher queue has a priority value in the range four to seven. 1. 3 · · · · · · Package Contents ES-1016A/ES-1024A Ethernet switch Power cord Quickstart Guide This User's Guide in CD-ROM format. Four rubber feet Rack mount brackets Compare the contents of your ES package with the checklist below. If any item is missing or damaged, please contact your local dealer. 1. 4 Ethernet Switching Technology Ethernet Switching Technology has dramatically boosted the total bandwidth of a network, eliminated congestion problems inherent with CSMA/CD (Carrier Sense multiple access with Collision Detection) protocol, and greatly reduced unnecessary transmissions. This revolutionized networking in a number of ways: By allowing two-way, simultaneous transmissions over the same port (Full-duplex), which essentially doubled the bandwidth. Reducing the collision domain to a single switch-port, which eliminated the need for carrier sensing. Using the store-and-forward technology's approach of inspecting each packet to intercept corrupt or redundant data, switching eliminated unnecessary transmission that slowed the network. By employing address learning, which replaced the inefficient receiving port. 1-2 Getting to Know Your Switch Dimension ES-1016A/ES-1024A Ethernet Switch Auto-negotiation regulates the speed and duplex of each port, based on the capability of both devices. Flowcontrol allows transmission from a 100Mbps node to a 10Mbps node without loss of data. Auto-negotiation and flow-control may require disablement for some networking operations involves legacy equipment. Disabling the auto-negotiation is accomplished by fixing the speed or duplex of a port. Ethernet Switching Technology supplied higher performance at costs lower than other solutions. Wider bandwidth, no congestion, and the reduction in traffic is why switching is replacing expensive routers and inefficient hubs as the ultimate networking solution. 1. 5 1. 5. 1 Applications Standalone Workgroup This section provides two network topology examples in which the switch is used. The switch can be used as a standalone switch to which computers, servers and printer server are directly connected to form a small workgroup. Figure 1-3 Standalone Workgroup Example 1. 5. 2 Bridging With its large address table (4000 MAC address entries) and high performance, the switch is an ideal solution for department networks to connect to the corporate backbone or for connecting network segments. Getting to Know Your Switch 1-3 Dimension ES-1016A/ES-1024A User's Guide The following figure depicts a typical segment bridge application of the switch in an enterprise environment. The two workgroups, the standalone server and the two servers can all communicate with each other and share all network resources. Figure 1-4 Bridging Example 1-4 Getting to Know Your Switch Dimension ES-1016A/ES-1024A Ethernet Switch Chapter 2 Hardware Description and Installation This chapter describes the hardware installation and gives a functional overview of the switch. 2. 1 Installation Option The switch is suitable for an office environment where it can be rack mounted on standard EIA racks or as a standalone. For proper ventilation, allow at least 4 inches (10 cm) of clearance at the front and 3. 4 inches (8 cm) at the back of the switch. This is especially important for enclosed rack installations. Step 2. Desktop Installation Make sure the switch is clean and dry. Set the switch on a smooth, leveled and sturdy flat space strong enough to support the weight of the switch and the connected cables. Make sure there is a power outlet nearby. Step 3. Make sure there is enough clearance around the switch to allow air circulation and the attachment of cables and the power cord. Step 4. Step 5. Remove the adhesive backing from the supplied rubber feet. Attach the rubber feet to each corner on the bottom of the switch. These rubber feet help protect the switch from shock or vibration and ensure space between devices when stacking. Hardware Description and Installation 2-1 Dimension ES-1016A/ES-1024A User's Guide Figure 2-1 Attaching Rubber Feet Do not block the ventilation holes. Leave space between switches when stacking. [. . . ] If you use longer cables than are needed, transmission quality may be affected. The network cables should not be longer than the limit of 100 meters. Too many hubs (or repeaters) between the connected computers in the network may increase the number of network collision or other network problems. Remove unnecessary hubs from the network. [. . . ]