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    Troubleshooting Notes for the Express 100BASE-TX Stackable Hub

    
    

    TROUBLESHOOTING NOTES FROM TECH SUPPORT FOR THE EXPRESS 100BASE-TX STACKABLE HUB

    
       Troubleshooting Notes from Tech Support for the Express 100BASE-TX
    
       Stackable Hub
    
    
    
       Connecting to a 10 Mbps segment
    
    
    
         The Express Stackable Hub is a 100 Mbps-only hub. You can't connect a
    
         10 Mbps device directly to the Express Stackable Hub 
    
    
    
         The preferred way to connect the a 10 Mbps segment or device to the
    
         Express Hub is by using the Intel Express 10/100 Downlink to connect
    
         10 Mbps segments or devices to an Express 100BASE-TX Stackable Hub or
    
         Switching Hub. The Express 10/100 Downlink is a 2 port switch with
    
         each port running at 10 Mbps or 100 Mbps.  Another inexpensive
    
         alternative is to using the Express 10/100 Downlink is to connect the
    
         segments through a server. 
    
    
    
         Several adapters on the market (such as the Intel EtherExpress PRO/100
    
         adapter) operate at either 10 or 100 Mbps. By connecting the Express
    
         100BASE-TX Stackable Hub to one server adapter at 100 Mbps and your
    
         10BASE-T hub to a separate adapter at 10 Mbps in the same server, you
    
         can route traffic from the 10 Mbps segment to the 100 Mbps segment
    
         through your Network Operating System (NOS) like Novell NetWare or
    
         Windows NT 3.51. 
    
    
    
         If your NOS doesn't support multi-protocol routing (Windows 95
    
         peer-to-peer and Windows for Workgroups don't), you must use a Fast
    
         Ethernet switch or router that supports both 10 Mbps and 100 Mbps.
    
    
    
         Note:  Window NT* 3.51 doesn't include the multi-protocol router
    
         software by default. You can download it from the Microsoft World Wide
    
         Web site.
    
    
    
       Downloading the Intel MIB (Management Information Base) file
    
    
    
         The MIB filename is HUB1MIB.EXE. You can find the file on Intel's
    
         Customer Support web site (http://www-cs.intel.com) or the Intel BBS
    
         (see the inside back cover of the User Guide for phone numbers). 
    
    
    
         Note: Be sure you assign an IP configuration to the switch before
    
         using it with an SNMP-compliant network management system (NMS). See
    
         the Quick Start section in the User Guide for more information.
    
    
    
         See your NMS documentation for instructions on compiling the MIB for a
    
         new device.
    
    
    
       Troubleshooting the Express Stackable Hub
    
    
    
       If there is an operating problem with the Express Stackable Hub,
    
       incorrect configuration or cabling is probably the cause. Try the
    
       troubleshooting steps below in order:
    
    
    
         1.  Verify that your cables are wired correctly. The most common
    
    
    
         problem is a cabling problem.  Review all link LED's to ensure that
    
         those ports you believe should be functioning are properly attached to
    
         a cable.  It is important to verify that cables are wired correctly.
    
    
    
         2.  Review the Link LEDs of other devices to ensure that those ports
    
         you believe should be functioning are properly attached to the switch
    
         with a Category 5 UTP cable.
    
    
    
         3.  Review the Express Hub's Link LEDS to ensure that ports you
    
         believe should be functioning are properly configured, and not
    
         disabled or partitioned. 
    
    
    
         4.  Make sure that the equipment attached to the switch is properly
    
         configured. If the COL LED is on continuously, you may have a problem
    
         with an adapter on that segment.
    
    
    
       How to order Express 100BASE-TX Hub Cascade Cable
    
    
    
         The Express 100BASE-TX Hub Cascade Cable ( EC100CC) can be ordered
    
         directly from Intel's Pay-for-Spares order line. Customers can call
    
         Pay-for-Spares at 503-222-5393, and order packet number NIO163.
    
    
    
         The cost of the Cascade cable is $35.00 for each cable, plus $7.88 for
    
         shipping and handling. 
    
    

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