
                           8225 Readme
 

The following information became available after the publication of the
IBM 8225 Fast Ethernet Stackable Hub Installation and User's Guide,
  (IBM Document Number GA27-4139-00).

  Code updates:

  8225 Model 002/003

  Version 1.13/1.19  Initial Release 9/30/96

  Version 1.14/1.20  Available 10/15/96
  1.  Corrects problem with Fast Expansion Modules losing the forwarding
      mode configuration setting after a power cycle.

  Version 1.19/1.26 Available 5/2/97
  1.  Fixes TELNET push flag error which cause NetView TELNET client
      hang up.
  2.  Add "Duplex In Use" field to show the Duplex mode determined by
      auto-negotiation.
  3.  Add "Forwarding In Use" field to show the status of "ADAPTIVE CUT-
      THROUGH" mode.
  4.  Add NMM ROM version in hub configuration menu.
  5.  Add "Admin status" in both port and FEM port to distinguish
      between port adminitration status and operational status.
  6.  Add "Status" in backup port configuration to distinguish between
      action and status of backup pairs.
  7.  Fixes IPX frame type AUTO-LEARN mode error.
  8.  Fixes SNMP OBJECT-TYPE parsing error when receiving an object with
      zero length.
  9.  Fixes TELNET hangup problem in IBM RS6000, TN3270 and the Mac PC.
 10.  Adds timeout control when the console lockout function is off.  At
      this  time when the TELNET user keeps in the login screen, the TCP
      session will never be closed.
 11.  Fixes hangup or data corruption problem when user set the
      rptrExtName object of HMI MIB.
 12.  Fixes the bug that Enable the IP protocol when the IP address is
      not available.
 13.  Fixed intrusion detection error bug.
 14.  Fixed the problem that FEM duplex status cannot be saved in the
      EEPROM.
 15.  Fixes TCP maximum segment size handshaking problem when the TCP
      client does not send maximum segment size option in SYN stage.
							
 Version 1.22/1.29 Available 4/1/99
  1. The purpose of this release of code (Model-002 V1.22 and Model-003 V1.29) is 
     to enhance security aspects of the hub's administration interface.  Its use 
     will ensure LAN administrators that unauthorized users cannot gain access to 
     the hub's administration facility and reconfigure it, possibly causing a 
     denial of service condition for authorized users.  No changes have been made 
     to the repeater portions of the code.

________________________________________________________________________________

  In General :

  1. IBM LAN Remon for Windows and IBM 8225 Model 003

     a. When using IBM's LAN Remon for Windows, Version 1.0 application
        with the IBM 8225 Model 003 RMON agent, the Summary View
        provided by this program may not interact correctly with the                   	  
        RMON agent in the 8225.  The interaction may cause the
        application (viewman.exe) to fail.  If the Summary View is used
        and it fails, LAN Remon for Windows can continue to provide all 
        of its other views and applications.  Access to other LAN Remon  
        views and/or applications is available from the "View Type" window 
        and view list.  This window is brought up by the Rmonman application
        (rrmonman.exe).  To activate Rmonman, open the IBM Nways LAN
        Remote Monitor program group and double click on the Rmonman
        program icon.

        Note:  The above applies ONLY to the Windows version of IBM LAN
        Remon.  Usage of other versions with the 8225 Model 003 does not
        cause this problem.

     b. When using LAN Remon for Windows, the creation of a matrix may
        not proceed correctly after the 8225 is powered up.  If when
        attempting to create a matrix, you get the message, "Matrix
        table... does not exist.  Do you wish to create it?"  Press
        "Yes".  Then close Remon for Windows (viewman.exe) and reopen                                  it.  The matrix functions should then work correctly.

  2. Problems downloading microcode (IBM 8225 Models 002 and 003)

     If while downloading new microcode to the hub, you encounter a power
     failure, your hub should enter monitor mode when it powers up
     instead of running its system code.  This monitor mode is signified
     by a NINDY> prompt at the management port interface.  Under these
     circumstances, the normal user interface program is disabled.  It is
     possible to recover from the download failure without using the
     normal user interface.  Please call IBM support at 1-800-772-2227
     for assistance in downloading the microcode.

  3. In the 8225 Installation and User's Guide, please add the following
     text to the section entitled "8225 Hub Replacement" on page 4-6.

     When replacing any of the 8225 hubs with a field service part,
     retain the following parts from the replaced hub for installation on
     the service replacement part:

     1. Power supply(s)
     2. Rack mounting brackets and screws (4)
     3. Any upgraded management agent memory SIMM (Model 003 only).  The
        replacement unit comes with the standard 4 MB SIMM.
     4. Redundant power supply blank cover
     5. Fast Expansion Module blank cover

  4. Additional Sites to get New Microcode

     If you should need to upgrade the microcode in your Model 002 or
     003, there are Internet sites you may access in addition to those
     listed in the Getting New Microcode section on page 3-42 of the 8225
     User's Guide.  The WWW site is:

     http://lansupport.raleigh.ibm.com/82x/82xprod.html

     The anonymous ftp site is:

     with a Web browser -
     ftp://lansupport.raleigh.ibm.com/pub/products/lanprods/hub

     from the command line -
     ftp lansupport.raleigh.ibm.com
     login as anonymous
     cd pub/products/lanprods/hub

  5. Troubleshooting Tip:

     If, after removal of the cover of the 8225 for purposes of adding
     memory, upgrades, etc., the front panel LEDs fail to light, check
     that the connecters of the ribbon cable connecting the LEDs at the
     front of the hub to the front of the circuit board at the bottom of
     the hub are securely fastened.  If this cable were to be jarred
     loose, the LEDs would fail to light.

  6. When performing any work on the interior of the 8225, check the
     following before completing reassembly:

     a. The connecters of the ribbon cable connecting the LEDs at the
        front of the hub to the front of the circuit board at the bottom
        of the hub are securely fastened.
     b. The fan connector is properly connected to its mating connector
        on the lower repeater board (Model 001) or the upper circuit
        board (Models 002, 003)
     c. The memory SIMM (Models 002, 003) is seated correctly in its
        socket on the agent (upper) circuit board.
     d. Be sure that the spring clips are all securely in place at the
        top of the hub frame where the top cover meets the frame and on
        the Fast Expansion Module mounting bracket or blank cover.
