HP Embedded Firewall manual Enabling Offloads, Value Offload Function Enables

Enabling Offloads

•IP and TCP Checksum Offload—reduced CPU utilization by allowing the NIC to perform the checksum calculation of TCP/IP and UDP/IP packets.

•802.1p Packet Priority Offload—reduces CPU utilization by allowing the NIC to perform the insertion of the 802.1Q tag header into the packet.

Enabling Offloads

Windows 2003 and Windows 2000 provide the capability to individually enable or disable each of the four offload features. (The default setting for these features is enabled.)

To enable or disable individual offload settings in Windows 2003 or Windows 2000:

1Right-click the My Network Places desktop icon and select Properties. The Network and Dial-up Connections screen appears.

2Right-click the Local Area Connection icon and select Properties. The Local Area Connection Properties screen appears.

3Click Configure.

The 3Com 10/100 Mbps Secure NIC screen appears.

4Click the Advanced tab.

5Select Enable Offloads in the Property list box.

6Select the appropriate value in the Value entry box (shown in the following table) for the desired offload state.

7Close all open windows.

The following table describes values for the offload functions:

Value	Offload Function Enables
All Offloads Disabled	No offloads
cksum	TCP Checksum
cksum-ipsec	TCP Checksum and IPSec
cksum-tcpseg	TCP Checksum and TCP Segmentation
cksum-tcpseg-ipsec	TCP Checksum and TCP Segmentation and IPSec
ipsec	IP Sec
tcpseg	TCP Segmentation
tcpseg-ipsec	TCP Segmentation and IPSec
802.1p	Packet Priority
802.1p-cksum	Packet Priority and TCP Checksum
802.1p-cksum-ipsec	Packet Priority and TCP Checksum and IPSec
802.1p-cksum-tcpseg	Packet Priority and TCP Checksum and TCP Segmentation
802.1p-cksum-tcpseg-ipsec	Packet Priority and TCP Checksum and TCP Segmentation and
	IPSec
802.1p-ipsec	Packet Priority and IPSec
802.1p-tcpseg	Packet Priority and TCP Segmentation
802.1p-tcpseg-ipsec	Packet Priority and TCP Segmentation and IPSec

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