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Although this is the safest setting, the best performance is achieved when the
threshold parameter is as low as possible without producing underruns. To
experiment, set the parameter to 16. Then, if performance drops significantly,
increase the value in small increments.
Coalesce Buffers
The rcommended value is 8 with a range of 1–32. This 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 will
be forced to queue the packet for later transmission. The most effective method
of transmitting data, however, is to use map registers.
Link Speed & Duplex
The recommended setting is Auto Detect (default). This parameter lets the
adapter know what speed to use on the Ethernet wire, and how to send and
receive packets, either full or half duplex. The following options are available:
v Auto Detect
The adapter detects whether its environment can support a speed of
100Mbps, and uses that speed if possible. It also negotiates with the switch
on whether to send and receive packets at full or half duplex.
v 10Mbps/Half Duplex
The adapter uses a speed of 10Mbps and performs one operation at a time.
It either sends or receives.
v 10Mbps/Full Duplex
The adapter uses a speed of 10Mbps and sends and receives packets at the
same time. This improves the performance of your adapter. Select this mode
only if you have a full-duplex switch.
Locally Administered Address (LAA)
You can optionally override the factory default network address of the adapter.
To enter a new network address, type a 12-digit hexadecimal number in this
box. The address entered should be in the range of
000000000000—FFFFFFFFFFFF. Exceptions: Do not use a multicast address (LSB
of the high byte = 1). For example, in the address 0X123456789AB, X cannot be
an odd number. A value of 000000000000 will default to the address set at the
factory.
PCI Bus Efficiency
When enabled, this option causes all transmit packets to be coalesced into a
single buffer before being sent to the network card. Because the entire frame
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PRO/100 SP Mobile Combo Adapter: User’s Guide