(C)Copyright 1998-2003 3Com Corporation.All rights reserved
(C)Copyright 1998-2003 Marvell.All rights reserved


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3Com 3C2000-T Adapter  
NDIS5 Miniport Driver for Windows 2000 (x86)


This file contains 
1  Overview 
2  Required Files 
3  Installation 

3.1  Installing the driver 
3.2  Updating the driver 

4  Parameters 

4.1  General driver options 
4.2  Advanced driver options 

5  Troubleshooting 



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1  Overview 
EL2K_2K.SYS is the NDIS5 32-bit Miniport driver for the
3Com 3C2000-T Adapter  .

This README file explains how to install the Miniport driver on a machine
running Windows 2000 (x86).

This driver supports only Windows 2000 (x86).


2  Required Files 
To install the driver, the following files are required:

3Com 3C2000-T Adapter  
el2k_2k.sys NDIS5 Miniport driver
el2000x.inf   installation setup script

3  Installation 

3.1  Installing the driver 

Read the installation instructions in the adapter manual carefully.
Follow these instructions to install the adapter in your computer.

With PCI adapters, due to the plug & play facility of PCI, the Windows 2000 (x86)
system is able to find, identify, and configure an adapter automatically.

If you install another 3C2000-T adapter , Windows 2000 (x86) 
will ask for a new driver. Insert the installation disk and follow the
instructions from Windows 2000 (x86).

If you install Windows 2000 (x86) with another 3C2000-T adapter
already inserted, Windows 2000 (x86) will not ask for a driver. The adapter is 
installed as "Ethernet Controller" under "Other Devices". To install 
the driver you have to perform a driver update as described in the next 
section.


3.2  Updating the driver 

To update the driver, proceed as follows:

1.  On the desktop right click on MY COMPUTER.
2.  Select MANAGE.
3.  In the "Device Manager" select the adapter you wish to update.
4.  Double click. 
5.  Select DRIVER.
6.  Click UPDATE DRIVER ... .
7.  Follow the instructions given by Windows 2000 (x86) to locate the driver.
9.  If the driver which is found to be the latest is not the one you want 
    to install, select the checkbox "Install one of the other drivers".
9.  Click NEXT. 
10. Select the driver to be installed in the next listbox.
11. Click NEXT.
    A message will be displayed that the driver is not digitally signed by
    Microsoft.
12. Click YES.
    The message "Windows has finished installing the software for this 
    device" is displayed.
13. Click FINISH to complete the installation.



4  Parameters 

4.1  General driver options 

The EL2K_2K.SYS driver allows you to modify several options
in order to optimize the operation of your 3Com 3C2000-T Adapter  .

To set the driver options, proceed as follows:
1.  In "Network and Dial-up Connections" right click on the adapter you 
    want to configure.
2.  Select "Properties". 
3.  Click "Configure".
4.  Click "Advanced".
5.  In the "Property" box, select the option that you want to change.
6.  Enter the desired value in the "Value" box.
7.  When finished, click OK .
    Windows 2000 (x86) will reload the driver with the changed settings.

The parameters supported by the driver are described below.

Preferred Port
--------------
Default value:  "A"
Valid range:    "A" or "B"

NOTE: This parameter is only available for dual link adapters.

Use this parameter to set the preferred port the RLMT (Redundant
Link Management Technology) will use for all network traffic, if more than
one port has an active link to the network.

RLMT Mode
---------
Default value:  "CLS"
Valid range:    "CLS"
                "CLP"
                "CLPSS"

NOTE: This parameter is only available for dual link adapters.

Use this parameter to set the operational mode for the RLMT:

- "CLS" (Check Link State): RLMT uses the link state reported by the
      adapter hardware for each individual port to determine whether a 
      port can be used for all network traffic or not.

- "CLP" (Check Local Port): In this mode, RLMT monitors the network path
      between the two ports of an adapter by regularly exchanging packets 
      between them. This mode requires a network configuration in which 
      the two ports "see" each other (i.e. there must not be any router 
      between the ports).

- "CLPSS" (Check Local Ports and Segmentation Status): This mode supports 
      the same functions as the CLP mode and additionally checks network 
      segmentation by sending BPDU hello packets. Thus, this mode is only 
      to be used if Gigabit Ethernet switches are installed on the network
      that have been configured to use the Spanning Tree protocol.

NOTE: RLMT modes "CLP" and "CLPSS" are designed to operate in 
      configurations where a network path between the ports on one adapter
      exists. Moreover, they are not designed to work where adapters are
      connected back-to-back.

Network Address
---------------
Default value:  burned-in adapter address
Valid range:    0y-00-00-00-00-01 to FE-FF-FF-FF-FF-FF (hexadecimal), 
                where at least the "locally administered" bit 2h 
                (i.e. bit #1) in the 'y' nibble must be set and the 
                multicast" bit 1h (i.e. bit #0) must not be set

CAUTION: Each individual network MAC address can only be used once in a
         network. Assigning the same address to more than one adapter in 
         the same network is not allowed and can cause serious network 
         problems.

To use a network MAC address other than the one burned into the adapter,
enter the network address in the following hexadecimal format:

    XX-XX-XX-XX-XX-XX (e.g. 02-00-5A-98-12-34).

If the network address field blank is left blank (or a different number of
digits is specified), the network address burned into the adapter will 
be used.

MaxFrameSize
------------
Default value:  1514 (decimal)
Valid range:    12..9014 (decimal)

This parameter specifies the maximum frame size in bytes that the driver
will support. The performance of your network usually increases when
a large packet size is used. Do not use values larger than 1514 if you
are not sure if your network supports jumbo frames.

Hardware Checksumming
---------------------
Default value:  "On"
Valid values:   "On"
                "Off"

This parameter is used to disable the hardware checksum offload for 
TCP/IP. There should be no need to disable checksum offload.

Wake Up Capabilities 
--------------------
 
Default value:  "All"
Valid values:   "None"
                "Magic Packet"
                "Pattern Match"
                "Link Change"
		"All"

- "None"            wake on LAN capabilities are disabled
- "Magic Packet"    wake up computer with MagicPacket(TM)
- "Pattern Match"   wake up with a packet containing a special pattern
- "Link Change"     wake up with link change

Link Speed 
----------
 
Default value:  "Auto"
Valid values:   "Auto"
                "10"
                "100"
                "1000"

- "Auto"        Auto-negotiate Speed
- "10"          Force Speed to 10 MBit
- "100"         Force Speed to 100 MBit
- "1000"        Force Speed to 1000 MBit


Number of Receive Buffers
-------------------------
Default value:  50 (decimal)
Valid range:    3..500 (decimal)

This parameters defines the number of receive buffers allocated by the
driver. If the system does not have enough resources the driver will fail 
to load. Increasing this value may improve performance.

Number of Transmit Buffers
-------------------------
Default value:  50 (decimal)
Valid range:    4..200 (decimal)

This parameters defines the number of transmit buffers allocated by the
driver. If the system does not have enough resources the driver will 
fail to load. Increasing this value may improve performance.

Interrupt Moderation
--------------------
Default value:  "On"
Valid values:   "On"
                "Off"

If more than the specified rate of interrupts occur, the function 
Interrupt Moderation groups these interrupts so that several data packets 
can be handled per interrupt. This will lead to lower CPU utilization 
but may increase the latency.

Max IRQ per Sec
---------------
Default value:  5000 (decimal)
Valid range:    1000..30000 (decimal)

This parameter specifies the interrupt rate for Interrupt Moderation. If
Interrupt Moderation is set to "Off" it will be ignored.

Log Status Messages
-------------------
Default value:  "Status Messages"
Valid values:   "All Messages"
                "Status Messages"
                "Warnings"
                "Errors"
                "None"

This parameter specifies the messages, which are to be logged in the 
Event Log.

- "All Messages":    This option should only be used for test purposes.
- "Status Messages": In this mode the driver will generate an event log 
                     entry every time the link status changes.
- "Warnings":        In this mode you will only receive warning or error 
                     messages.
- "Errors":          In this mode you will only receive error messages.
- "None":            All driver messages will be suppressed. It is not 
                     recommended to use this value.


AutoNegotiation_<n>   <n> = port designator (A or B)
-------------------
Type:           String
Default value:  "On"
Valid range:    "Off"
                "On"
                "Auto-Sense"

NOTE: If this parameter is set to "Off" and 'DuplexCapabilities' is
      set to "half and full duplex" the driver will override the
      setting and use "On" instead.

This parameter defines the auto-negotiation mode and can be set for each 
port individually, which is helpful if the port at the other end of the 
cable is limited in its capabilities. Using the default setting, the
3Com 3C2000-T Adapter   should automatically detect the capabilities of the peer port.

DuplexCapabilities_<n>   <n> = port designator (A or B)
----------------------
Type:           String
Default value:  "half and full duplex"
Valid range:    "half duplex"
                "full duplex"
                "half and full duplex"

NOTE: This parameter is ignored if 'AutoNegotiation' is set to "auto-sense".

This parameter can be used to limit the duplex capabilities the port
reports during auto-negotiation. This parameter can be set for each port
individually, which is helpful if the port at the other end of the cable 
cannot handle all possible combinations. Using the default setting, the
3Com 3C2000-T Adapter   should automatically detect the capabilities of the peer port.

FlowControl_<n>   <n> = port designator (A or B)
---------------
Type:           String
Default value:  "Asymmetrical and Symmetrical Flow Control"
Valid range:    "No Flow Control"
                "Asymmetrical Flow Control"
                "Symmetrical Flow Control"
                "Asymmetrical and Symmetrical Flow Control"

Modes:
- Symmetrical Flow Control: Both link partners are allowed to send 
                            PAUSE frames.

- Asymmetrical and Symmetrical Flow Control: Both or only the remote
                                             link partner are allowed
                                             to send PAUSE frames.

- Asymmetrical Flow Control: Only the local link partner is allowed 
                             to send PAUSE frames.

- No Flow Control: No link partner is allowed to send PAUSE frames.

NOTE: This parameter is ignored if 'AutoNegotiation' is set to "Off".

This parameter can be used to set the flow control capabilities the port 
reports during auto-negotiation. This parameter can be set for each port 
individually, which is helpful if the port at the other end of the cable 
cannot handle all possible combinations. Using the default setting, the
3Com 3C2000-T Adapter   should automatically detect the capabilities of the peer port.


Role_<n>   <n> = port designator (A or B)
--------
Type:           String
Default value:  "Auto"
Valid range:    "Auto"
                "Master"
                "Slave"

 
For two 1000Base-T ports to communicate, one must take the role of the 
master (providing timing information), while the other must be slave.
Usually, this is negotiated between the two ports during link
establishment. If this fails, a port can be forced to a specific setting 
with this parameter.



5  Troubleshooting 
If you should encounter any problems with your 3Com 3C2000-T Adapter,
please re-read the instructions above and the documentation supplied with the
operating system.

If you do not find a solution, please send us a description of the
problem.

Contact 3Com support for further information (for contact
information, please refer to the SUPPORT.HTM file on the installation
medium).

*** End of Readme File ***

