Enabling Offloads - 3Com EtherLink 10 User Manual

Enabling Offloads Windows 2000 provides the capability to individually enable or disable each of the
four offload features. (The default setting for these features is enabled.)
NOTE: For users running the Beta 3 version of Microsoft Windows 2000, the
Offload function must be globally enabled in Windows 2000 before individual
offload features can be enabled or disabled.
See the readme.txt file in the root of the EtherCD for the latest information about
enabling and disabling offload features in the Beta 3 version of Windows 2000.
To enable or disable individual Offload settings in Windows 2000:
1 Click the My Network Places desktop icon.
The Network and Dial-up Connections screen appears.
2 Click the Local Area Connection icon.
The Local Area Connection Properties screen appears.
3 Click Configure.
The 3Com EtherLink 10/100 NIC with 3XP processor (3CR990-TX-9x)
screen appears.
4 Click the Advanced tab.
5 Select Enable Offloads in the Property list box.
6 Enter the hex number below for the desired offload state in the Value entry box.
7 Close all open windows.
The following table shows the hex values for the offload functions:
NOTE: The default hex value is F: all offloads enabled.
Hex Value Offload Function Enabled
0 Offloads disabled
1 IPSec
2 TCP Segmentation
3 TCP Segmentation
IPSec
4 IP and TCP Checksum
5 IP and TCP Checksum
IPSec
(continued)
6 IP and TCP Checksum
TCP Segmentation
Windows 2000 Offload Features
Hex Value Offload Function Enabled
8 802.1P Packet Priority
9 802.1P Packet Priority
IPSec
A 802.1P Packet Priority
TCP Segmentation
B 802.1P Packet Priority
TCP Segmentation
IPSec
C 802.1P Packet Priority
IP and TCP Checksum
D 802.1P Packet Priority
IP and TCP Checksum
IPSec
E 802.1P Packet Priority
IP and TCP Checksum
TCP Segmentation
19