Allied Telesis NETEXTREME II AT-2973SX - Manual (Page 111)

AT-2973SX, AT-2973T, and AT-2973T/4 NetExtreme II Family Adapters Installation and User’s Guide
111
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:
 “AT-2973SX Adapter Physical Description” on page 17
 “AT-2973T Adapter Physical Description” on page 18
 “AT-2973T/4 Adapter Physical Description” on page 21