Updating the
Checksum
Offload Property
Usually, the Checksum Offload function is computed by the protocol stack. By selecting one of the Checksum Offload properties, the adapter can compute the checksum.
To change the Checksum Offload setting, do the following:
1.Access the Advanced tab:
For Windows Server 2003 Operating systems, see “Selecting the Advanced Tab in Windows Server 2003” on page 100.
For Windows Server 2008, Windows Server 2008 R2 or Windows 7 Operating systems, see “Selecting the Advanced Tab in Windows Server 2008, Windows Server 2008 R2, and Windows 7” on page 103.
For Windows Operating systems, see “Selecting the Advanced Tab in Windows Vista” on page 104.
The Advanced tab is shown in Figure 19 on page 102.
2.From the Property list under the Advanced tab, select IPv4 Checksum Offload or IPv6 Checksum Offload.
3.From the Value list on the Advanced tab, select one of the following:
None - Disables checksum offloading.
Rx TCP/IP Checksum - Enables receive TCP, IP, and UDP checksum offloading.
Tx TCP/IP Checksum - Enables transmit TCP, IP, and UDP checksum offloading.
Tx/Rx TCP/IP Checksum (default) - Enables transmit and receive TCP, IP, and UDP checksum offloading.
4.Click OK.
5.If prompted to restart your computer, click Yes.
Although it is not necessary to reboot the system for new adapter properties to take effect, rebooting is recommended to reinitialize all registers.
6.Verify that the port LED operates correctly. See one of the following descriptions:
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