AIX Version 4.3 Differences Guide

7.12.2 Configuration Parameters
The following parameters are user configurable:
Transmit Queue Size (tx_que_size)
The device driver supports a user-configurable transmit queue. This is the queue
the adapter uses (not an extension of the adapter’s queue). It is configurable
among the values of 16, 32, 64, 128, and 256, with a default of 256.
Because of the configurable size of the adapter’s hardware queue, the driver
does not support a software queue.
Receive Queue Size (rx_que_size)
The device driver supports a user-configurable receive queue. This is the queue
the adapter uses (not an extention of the adapter’s queue). It is configurable
among the values of 16, 32, 64, 128, and 256, with a default of 256.
Receive Buffer Pool Size (rxbuf_pool_size)
The device driver supports a user-configurable receive buffer pool size. The
buffer is the number of pre-allocated mbufs for receiving packets. The minimum
size of the buffer is the receive queue size, and the maximum is 2 KB, with a
default value of 384.
Media Speed (media_speed)
The device driver supports speeds of 10 (10 Mbps, half-duplex), 20 (10 Mbps,
full-duplex), 100 (100 Mbps, half-duplex), 200 (100 Mbps, full-duplex), and
auto-negotiate on twisted pair. On the AUI port the device driver will support
speeds of 10 (10 Mbps, half-duplex) and 20 (10 Mbps, full-duplex). The BNC port
will only support 10 (10 Mbps, half-duplex). This attribute is user-configurable,
with a default of auto-negotiate on twisted pair.
Enable Alternate Address (use_alt_addr)
The device driver supports a configuration option to turn on and off use of an
alternate network address. The values are yes and no, with a default of no. When
this value is set to yes, the alt_addr parameter will define the address.
Alternate Network Address (alt_addr)
For the network address, the device driver accepts the adapter’s hardware
address or a configured alternate network address. When the use_alt_addr
configuration option is set to yes, this alternate address is used. Any valid
Individual Address can be used, but a multicast address can not be defined as a
network address.
Inter-Packet Gap (ip_gap)
The inter-packet gap bit rate setting controls the aggressiveness of the adapter
on the network. A smaller number will increase the aggressiveness of the
adapter, while a larger number will decrease the aggressiveness (and increase
the fairness) of the adapter. If the adapter statistics show a large number of
collisions and deferrals, this number should be increased. Valid values range
from 96 to 252, in increments of 4. The default value of 96 results in IPG of 9.6
microseconds for 10 Mb and 0.96 microseconds for 100 Mb media speeds. Each
Networking Enhancements 179