•Speed/Duplex Setting. Changes the current speed and duplex settings. Be sure this setting is compatible with the link partner (examples: switch, hub).

oDefault

1000BASE-SX or -LX Adapters: 1000/Full

10/100/100 Adapters: Auto/Auto

oRange

1000BASE-SX or -LX Adapters: 1000/Full

10/100/100 Adapters: Auto/Auto; 10/Half; 10/Full; 100/Half; 100/Full; 100/Full

•Maximum Frame Size. Specifies the maximum number of bytes in a single packet. Larger frames can increase throughput and decrease CPU use by putting more data in each packet, thereby sending out fewer packets. This is equivalent to Jumbo Frames and must comply with switch limitations.

oDefault = 1514 Bytes

oRange = 1514 Bytes; 4088 Bytes; 9014 Bytes; 16128 Bytes

NOTE: All Gigabit team members must support maximum frame size for this parameter to be enabled. If any one team member is not supported, then it is disabled for the team. Size of the frame is determined by the lowest value for the team members. The 16128 setting applies for Fiber Gigabit Ethernet server adapters only.

•Number of Coalesce Buffers. Specifies the number of memory buffers available to the driver in case the driver runs out of available map registers. This buffer area is also used when a packet consists of many fragments. If no coalesce buffers or map registers are available, the driver is forced to queue the packet for later transmission. The preferred method of transmitting data is to use map registers, since it is the most efficient method.

o Default = 128

o Range = 16–768 (increments of 8)

•Number of Receive Descriptors: Minimum/Maximum. Specifies the number of descriptors used by the driver when copying data to the protocol memory. 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 = 160 o Range

NC6132, NC6133, and NC6134: 64–768 (increments of 8)

NC6136, NC7131, and NC7132: 64–256 (increments of 8)

•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 = 256 o Range

NC6132, NC6133, and NC6134: 64–768 (increments of 8)

NC6136, NC7131, and NC7132: 64–256 (increments of 8)

Adapter configurations 109