HP ProLiant Network Adapter Software and Configuration Guide

Configuration and diagnostics 7
• Flow Control. The Flow Control property allows the user to enable or disable the receipt or transmission
of PAUSE frames. PAUSE frames enable the adapter and the switch to control the transmit rate. The side
that is receiving the PAUSE frame will momentarily stop transmitting. The recommended selection is
Auto and it is the default setting. To disable Flow Control, select Disable from the Value list on the
Advanced tab.
o Disable. PAUSE frame receipt and transmission is disabled
o Tx Enable. PAUSE frame transmission is enabled
o Rx Enable. PAUSE frame receipt is enabled
o Rx/Tx Enable (Default). PAUSE frame receipt and transmission is enabled
• Ethernet @ WireSpeed. Enables linking at 100 Mbps when using a cable that does not support Gigabit
speed.
o Default = Enabled
o Range = Disabled; Enabled
• Optimize Interrupt moderation. If enabled, helps to reduce number of interrupts per packet, which
reduces CPU utilization, while maintaining the same throughput. This feature is useful under heavy
network traffic conditions.
o Default = L2 and L4
o Range = L2 and L4; L2 only; Manual
• WOL Speed. Specifies the speed at which the adapter connects to the network during Wake-on-LAN
mode.
o Default = Auto
o Range = Auto; 10 Mb; 100 Mb
• Number of Transmit Descriptors: Minimum/Maximum. Specifies the number of descriptors to allocate
per Transmit Control Block (TCB). This value directly affects the number of map registers allocated for the
adapter (the higher the number, the more map registers are allocated).
o Default = 200
o Range = 100 — 512
• Target DPC Rate. Determines the desired DPC rate. The driver adjusts the adapter's interrupt moderation
setting dynamically based on network conditions to achieve the desired DPC rate. This configuration is
valid only when "Optimized Interrupt Moderation" is set to manual.
o Default = 4425
o Range = 1500 — 6000
• Number of Receive Descriptors: Minimum/Maximum. In high network load situations, increasing
receive descriptors can increase performance. The tradeoff is that this also increases the amount of
system memory used by the driver. If too few receive descriptors are used, performance suffers. If too
many receive descriptors are used, the driver unnecessarily consumes memory resources.
o Default = 200
o Range = 100 — 512
• IPv4 Checksum Offload. Describes whether the device enabled or disabled the calculation of IPv4
checksums.
o Default = Rx/Tx Enabled
o Range = Cannot be disabled