Intel Express 10/100 Stackable Hub User Guide
This guide covers the following products: Intel Express 10/100 Stackable Hub - 12-port TX hub. Product code EE110TX12. Intel Express 10/100 Stackable Hub - 24-port TX hub. Product code EE110TX24. Copyright © 1997, Intel Corporation. All rights reserved. Intel Corporation, 5200 NE Elam Young Parkway, Hillsboro OR 97124-6497 Intel Corporation assumes no responsibility for errors or omissions in this manual. Nor does Intel make any commitment to update the information contained herein.
Quick Start 1. Install the Express 10/100 Stackable Hub in a rack or on a shelf or table, plug it in, and turn the power on. Rack: Use the four small screws to attach the brackets to the hub. Use the four large screws (not shown) to attach the hub to the rack.
(Optional) Connecting multiple hubs Connecting hubs running at 100 Mbps to hubs running at 10 Mbps Use an Intel Cascade Cable to connect the hubs. Hubs running at 100 Mbps can talk to each other, and hubs running at 10 Mbps can talk to each other. However, hubs running at 100 Mbps can’t talk to hubs running at 10 Mbps without bridging equipment. See pages 5-7 for more information. Optional bridging equipment Hubs 1 and 2 are in one collision domain and share 100 Mbps of bandwidth.
Contents Overview .................................................................................................................................................. 3 Connection Guidelines ............................................................................................................................. 4 Example Configurations .......................................................................................................................... 5 Mixed 10 Mbps and 100 Mbps environment ........
Connection Guidelines Connecting 100BASE-TX devices OK • Use Category 5 twisted-pair Ethernet (CAT 5 TPE) cable. • Always limit the distance between devices connected with TPE cable to 100 meters (the IEEE specification requires this). • Use a crossover cable to connect the hub to a switch. Use a straight-through cable to connect the hub to a server or workstation. See pages 12-13 for more information on cabling.
NOTE You must use an Intel Cascade Cable to connect hubs running at 100 Mbps. Do not daisychain hubs with TPE crossover cabling. Intel Cascade Cable (product code EE110CC) NOTE In a managed stack of hubs, the optional Management Module can communicate with all hubs, regardless of speed. The Ethernet Module acts as a switch port plugged into a hub. It has the added benefit of connecting to a switch or server configured at full-duplex.
The benefits of the switch are its port density (eight base ports expandable to 12), performance, and manageability. Bridging with the Express 10/100 Fast Ethernet Switch A switch with individual ports capable of operating at 10 or 100 Mbps can bridge 10 Mbps and 100 Mbps segments. No configuration of your network operating system is needed.
Here, the 2-port 10/100 Downlink bridges the two 100 Mbps hubs to the two 10 Mbps hubs. The benefits of using the Downlink are its low cost and simplicity. Just plug the hubs into the Downlink; it takes care of the rest. Bridging with the Express 10/100 Downlink The Express 10/100 Downlink has two ports that operate at either 10 or 100 Mbps. Each port automatically senses the speed of the attached device. All you need to do is set the speed of the hubs.
Extending the 100 Mbps network topology You can extend the network topology only by connecting hubs to a switch, bridge, or router. You can’t extend the topology by daisychaining hubs together. In the example below, the network diameter is extended to 400 meters by connecting the two hub stacks to an Intel Express 10/100 Fast Ethernet Switch. Each stack is a separate collision domain.
Extending the 10 Mbps network topology To extend the 10BASE-T network topology, you can attach hubs to a switch or daisy-chain the hubs using TPE cabling. If you attach a stack of hubs to a switch, each stack gets its own 10 Mbps of bandwidth. Attaching hubs to a switch The illustration below shows two stacks of Express 10/100 Stackable Hubs operating at 10 Mbps attached to Intel Express 10/100 Switch ports also operating at 10 Mbps.
Understanding LEDs NOTE Port LEDs If you don’t see the Green LED light immediately, wait. Establishing a link to a device can take up to six seconds. The LEDs above a port provide information about the port’s configuration and status. Amber LED (right side) Green LED (left side) LED Status Meaning Green Solid Blinking Port has a link. Receive activity detected on port. Off No link detected. Amber Solid Port is disabled by management (not applicable without optional Management Module).
NOTE If you change the speed, the hub keeps the setting until you change it again, even if you turn off the hub’s power. Changes the hub speed. The default speed is 100 Mbps. Unit LEDs Unit LEDs indicate the status of a hub’s power supply, hub speed, collision occurrences in a hub or stack of hubs, and whether a hub is managed. Change hub speed 10BASE-T 100BASE-TX Collision Managed Status Power LED Status Meaning 10BASE-T On Hub is operating at 10 Mbps.
Cabling Requirements Incorrect cabling is often the cause of network problems. Read the next two pages if you’re unsure of your requirements. 100BASE-TX requirements The 100BASE-TX Fast Ethernet specification requires you use CAT 5 unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cabling to operate at 100 Mbps (UTP and STP are collectively referred to as TPE). If you use lower grade cabling (CAT 3 or CAT 4 TPE), you may get a connection, but will soon experience data loss or slow performance.
Straight-through vs. crossover cables 8 1 Ports on the hub are wired MDI-X (media dependent interface crossover) so you can use a straight-through cable when connecting to a workstation or server (network adapter cards are wired MDI). For direct connection to another MDI-X port (hub and switch ports), you must use a crossover cable.
Troubleshooting No link (green LED is off). • Remove the cable and plug it in again. Wait up to six seconds for a link. • If you’re using the wrong type of cable, either straight-through or crossover, the green LED above the port will not come on. Use the other type of cable. • Make sure the device you’ve connected to a port is a 10BASE-T or 100BASE-TX device. The Express 10/100 Stackable Hub doesn’t support 100BASE-T4 devices running at 100 Mbps. However, it does support T4 devices running at 10 Mbps.
Frequently Asked Questions I have 10 Mbps and 100 Mbps hubs connected with an Intel Cascade Cable. Can they talk to each other? No. All hubs running at 100 Mbps are in one collision domain (or segment) and all hubs running at 10 Mbps are in a separate collision domain. See pages 5-7 for bridging options. Then why would I connect hubs running at 10 Mbps to hubs running at 100 Mbps? For management purposes.
Can I configure a full-duplex link between the hub and another device? Only to the optional Ethernet Module or Fiber Module. The external ports on the modules are switched ports and are capable of full duplex. The base ports of the hubs aren’t capable of full-duplex operation. Can I connect a 100BASE-T4 device to the hub? If the device is capable of 10 or 100 Mbps operation, you can connect it at 10 Mbps. You need to purchase a 100BASE-T4 hub to connect a 100BASE-T4 device at 100 Mbps.
Limited Hardware Warranty Intel warrants to the original owner that the hardware product delivered in this package will be free from defects in material and workmanship for three (3) years following the latter of: (i) the date of purchase only if you register by returning the registration card as indicated thereon with proof of purchase; or (ii) the date of manufacture; or (iii) the registration date if by electronic means provided such registration occurs within 30 days from purchase.
Federal Communications Commission (FCC) Statement This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
WARNUNG Das System wurde für den Betrieb in einer normalen Büroumgebung entwickelt. Der entwickelt.
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