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Gemini G3 - User Manual
76
Appendix 5 - Ethernet Configuration - Recommendation
The contents of this appendix are extracted from Technical Instruction Sheet 052 (TIS052), dated Decem-
ber 06, 2006.
Overview
The recommendation in TIS052, intended for maintenance technicians and for end-users, addresses an
issue where communication fails when trying to connect, or attempting to FTP files to upgrade a unit.
Ethernet Network Port Setting
For GeminiG3 radiomodems, Dataradio recommends setting to half duplex and 10 BaseT.
FTP Connection Failure Indication
FTP transfer stops on one of the transfer steps and displays a message similar to:
>Netout: Connection reset by peer
Connection closed by remote host.
ftp>
FTP Recommendation
Certain Ethernet cards have
(as default)
the option to calculate the Rx/Tx checksum through the hardware
on the Ethernet card instead of the OS. These cards can have bugs and sometimes get the wrong CRC re-
sult, resulting in dropped packets and connectivity failure. If having connectivity problems configuring an
Ethernet card, change the following parameters to “Disable”:
♦
Rx Checksum Offload
♦
Tx Checksum Offload
Even though this Ethernet card issue occurred when running Windows XP Professional SP2, as well as
Windows 2000, we believe it could manifest itself under other (or older) operating systems, with a variety
of network cards, and on other Dataradio radiomodem products.
DATARADIO and VIS are registered trademarks, GeminiG3, Paragon3, PARALLEL DECODE, and TRUSTED
WIRELESS DATA are trademarks of Dataradio Inc