Release Notes PN 93000571_D

			   Digi Connect ES

			    82001234_D EOS

                            April 30, 2008


INTRODUCTION

    This is a production release of firmware for the Digi Connect ES.

SUPPORTED PRODUCTS

    Digi Connect ES

ENHANCEMENTS

    - New network stack that provides greater stability and functionality

    - Many new features that are documented in the various Digi Connect
      Family manuals available from the Digi web site

BUG FIXES

    - The Connect ES would sometimes fall off of the network and required
      a reboot to begin functioning correcly.

    - The Connect ES would sometimes introduce data errors while processing
      high volumes of data at high speeds

RealPort Keepalive

    The RealPort protocol has an optional mechanism that uses an
    internal "keepalive" packet to cause periodic guaranteed traffic
    on a link.  This packet however may cause issues in environments
    that are metered for traffic or do not require this type of
    mechanism.  The "set realport" command can be used to turn off
    this behavior with "set realport keepalive=off".

RealPort Exclusive

    In normal operation, the RealPort protocol will allow multiple
    connections from a single IP since that IP may be masking multiple
    servers through a NAT firewall.  However, if network problems occur,
    port status may become locked open until the unit can detect that its
    socket connection is bad.  To aid in fast recovery, the "set
    realport exclusive" option can be turned on.  This will only allow a
    single session from an IP.  A duplicate connection will cause the
    first connection to be terminated.  If it can be guaranteed that each
    driver will appear to have a unique IP, this will allow the driver to
    recover device resources much sooner.

KNOWN ISSUES

    Use of SNMP V2 is not recommended.  Problems may be encountered
    with MIB traversal.

    It is not currently possible to configure the escape
    characters used by client applications (connect, telnet,
    and rlogin).

    For the most consistent experience with the user interface,
    it is suggested that you clear your Internet cache.

    Microsoft Internet Explorer 6 Service Pack 1 (SP1) has a known 
    problem where it displays the error message "Internet Explorer 
    Cannot Open" when you use an HTTPS URL to access this Digi 
    product.  The following Microsoft article explains the problem:

        http://support.microsoft.com/default.aspx?kbid=812935


IP ADDRESS ASSIGNMENT NOTES

    The Digi Connect ES supports three IP assignment methods:

        * Static IP address
        * DHCP
        * Auto-IP

    If a static address is enabled, it will be used.

    If a static address is not enabled, and DHCP is enabled, the
    unit will use an address supplied by a DHCP server regardless
    of the state of Auto-IP configuration.

    If a static address is not enabled, and Auto-IP is enabled,
    it will be used to generate an address ONLY if DHCP is
    disabled, or if DHCP is enabled and a DHCP server has not
    responded to the DHCP query.  If both are enabled, Auto-IP
    has assigned an address, and then a DHCP server responds, the
    Auto-IP address will be discarded and the DHCP address will
    be used.

RESETTING THE UNIT

    One feature of the Digi Connect ES firmware is an ability
    for a user to both soft reset the unit as well as reset
    the unit to its factory defaults.

    Both functions may be invoked via the "reset" hole between the
    power switch and the ethernet ports

        * If the unit is running, holding the button for
          a second and then releasing it will soft reset
          the unit.

        * If the button is pressed for more than 10 seconds
          from the power on of the unit, it will prepare
	  to reset the unit to its factory default state.
	  Once the unit is prepared to reset, it will blink
	  "1-5-1" on the red LED.  Releasing the button
	  will then reset the configuration.

ENABLING THE WEB USER INTERFACE

    The embedded web user interface is ALWAYS available at the
    following URL:

        http://ip-address-of-device/home.htm

    It is also available as the default configuration interface
    at the following URL:

        http://ip-address-of-device

ADDITIONAL INFORMATION 

    The configuration save and restore tools will save every
    configurable parameter (including IP configuration) except
    for some related to password authentication.

HISTORY

    82001234_B1

      - RealPort keepalive is now configurable through the 
        'set realport' command
      - RealPort exclusive feature added

    82001234_A2
      - Added 'set serial closewait' parameter which allows the user to
        select how long the port will wait for data to drain before flushing
        any remaining data and closing anyway.
      - Allow Keep-alive ACKs to be properly managed even when the TCP
        window is full.
      - Fix a memory leak when an Ethernet to serial connection is closed 
        repeatedly.

    82001234_A1
    
        Initial production release