Allied Telesis AT-2874SX - Manual (Page 52)

AT-2874SX Gigabit Ethernet Fiber ExpressCard Installation and User’s Guide
52
IPv4 Checksum Offload
The IPv4 Checksum Offload feature allows the ExpressCard to verify the
IPv4 checksum to enhance IPv4 receive and transmit performance and
reduce CPU utilization.
To enable or disable the IPv4 Checksum Offload feature, do the following:
1. Access the Advanced Properties.
See “Accessing Advanced Properties” on page 47.
2. Select IPv4 Checksum Offload in the Property box.
The IPv4 Checksum Offload page is displayed as shown in Figure 30.
Figure 30. IPv4 Checksum Offload Page
3. Select one of the following options:
 Disabled — The CPU verifies IPv4 checksum.
 Rx & Tx Enabled — The ExpressCard verifies IPv4 Checksum for
both receiving and transmitting packets. This is the default setting.
 Rx Enabled — The ExpressCard verifies IPv4 Checksum only for
receiving packets.
 Tx Enabled — The ExpressCard verifies IPv4 Checksum only for
transmitting packets.
4. Click OK.