Tcp Checksum Offload Function; Setup Method In Each Os; Windows 2008 R2 - Hitachi CN7741-Y Instruction Manual

TCP Checksum Offload function

Even though the LAN Card has a function to calculate the TCP/IP checksum, it
is recommended to use the operating system's standard TCP/IP checksum
calculation function instead of the LAN Card's function. If the TCP/IP checksum
is set to be calculated by the operating system, the operating system checks
integrity of the packet data received from the network at the final phase of
protocol processing. This helps to configure a more reliable system.

Setup method in each OS

Windows 2008 R2

Click Hardware of Control Panel and then click Device Manager of Devices
and Printers. In the Device Manager window, double-click Broadcom
NetXtreme Gigabit Ethernet under Network Adapter. Click to Detail tab.
When a setting item is displayed on the following list, please change setting
according to a list.
Table 6-1 Settings
IPv4 Checksum Offload
TCP/UDP Checksum Offload (IPv4)
TCP/UDP Checksum Offload (IPv6)
Large Send Offload (IPv4)
Large Send Offload v2 (IPv4)
Large Send Offload v2 (IPv6)
Receive Side Scaling
When you finish setting the above items, click [OK] and restart the OS.
6-2
Item
Supplementary Note on LAN Card Function
PCI-Express Quad Port Gigabit LAN Card Instruction Manual
Configuration
Broadcom Advanced Control
Suite 4 not installed
Rx & Tx Enabled→None
Rx & Tx Enabled→None
Rx & Tx Enabled→None
Enable→Disable
Enable→Disable
Enable→Disable
Enable→Disable
Broadcom Advanced Control
Suite 4 installed
Rx & Tx Enabled→None
Rx & Tx Enabled→None
Rx & Tx Enabled→None
Enable→Disable
Enable→Disable
Enable→Disable
Enable→Disable