Installation guide
AT-2973SX, AT-2973T, AT-2973T/4, and AT-VNC10S Adapters Installation and User’s Guide
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Flow Control Enables or disables the receipt or 
transmission of PAUSE frames. 
PAUSE frames allow the network 
adapter and a switch to control the 
transmit rate. The side that is 
receiving the PAUSE frame 
momentarily stops transmitting. By 
enabling TOE, network 
performance improves, but with 
the increased performance, TOE 
performance is more susceptible 
to packet loss when flow control is 
disabled. Enable flow control to 
reduce the number of packets lost.
1. In Microsoft Windows, right-
click the Network Adapter in 
Network Connections and then 
click Properties.
2. Click the Configure button and 
then the Advanced tab.
3. Set the desired Flow Control 
value.
Interrupt 
Moderation
Enables interrupt moderation, 
which limits the rate of interrupt to 
the CPU during packet 
transmission and packet 
reception. The disabled option 
allows one interrupt for every 
packet transmission and packet 
reception. Enable is the default 
option.
1. In Microsoft Windows, right-
click the Network Adapter in 
Network Connections and then 
click Properties.
2. Click the Configure button and 
then the Advanced tab.
3. Set the desired Interrupt 
Moderation value.
IPv4 Checksum 
Offload
Allows configuring checksum 
offload for the IPv4 protocol:
 Disable - Disables checksum 
offload.
 Rx Enabled - Enables receive 
TCP/IP/UDP checksum 
offload.
 Tx Enabled - Enables transmit 
TCP/IP/UDP checksum 
offload.
 TX & Rx Enabled (default) - 
Enables transmit and receive 
TCP/IP/UDP checks
1. In Microsoft Windows, right-
click the Network Adapter in 
Network Connections and then 
click Properties.
2. Click the Configure button and 
then the Advanced tab.
3. Set the desired IPv4 
Checksum Offload value
Table 13. Advanced Features in Microsoft Windows
Feature Description Configuration Steps










