Ethernet I/O Module User's Guide

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Checksum Offload Normally, the checksum function is computed by the protocol stack.
When you select one of the Checksum Offload property values (other than
None), the checksum can be computed by the network adapter.
• Rx TCP/IP Checksum
Enables receive TCP/IP/UDP checksum offload.
• Tx TCP/IP Checksum
Enables transmit TCP/IP/UDP checksum offload.
• Tx/Rx TCP/IP Checksum (default)
Enables transmit and receive TCP/IP/UDP checksum offload.
•None
Disables checksum offload.
Flow Control The Flow Control property enables or disables the receipt or transmission
of PAUSE frames. PAUSE frames enable the network adapter and a
switch to control the transmit rate. The side that is receiving the PAUSE
frame momentarily stops transmitting.
• Auto (default)
PAUSE frame receipt and transmission are optimized.
• Disable
PAUSE frame receipt and transmission are disabled.
•Rx PAUSE
PAUSE frame receipt is enabled.
•Rx/Tx PAUSE
PAUSE frame receipt and transmission are enabled.
• Tx PAUSE
PAUSE frame transmission is enabled.
Large Send Offload Normally the TCP segmentation is done by the protocol stack. When you
enable the Large Send Offload property, the TCP segmentation can be
done by the network adapter.
• Disable
Disables Large Send Offload
• Enable. (default)
Enables Large Send Offload
Item Description