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APPENDIX C
Configuring the Quad FastEthernet
Device Driver Parameters
The qfe device driver controls the Sun Quad FastEthernet PCI adapter’s SUNW,qfe
Ethernet devices. You can manually configure the qfe device driver parameters to
customize each SUNW,qfe device in your system. This appendix provides an
overview of the internal transceiver used in the adapter, lists the available qfe
device driver parameters, and describes how you can configure these parameters.
Internal Transceiver
The four SUNW,qfe channels provide 10BASE-TX or 100BASE-T networking
interfaces using the PCI Fast Ethernet and Expansion (PFEX) ASIC and an internal
transceiver. The driver automatically sets the link speed to 10 or 100 Mbps and
conforms to the 100BASE-T IEEE 802.3u Ethernet standard. The PFEX ASIC provides
the PCI interface and Media Access Control (MAC) functions. The internal
transceiver, which connects to an RJ-45 connector, provides the physical layer
functions.
The internal transceiver is capable of all the operating speeds and modes listed in the
section, “Auto-Negotiation” on page 16. The internal transceiver performs
auto-negotiation with the remote end of the link (link partner) to select a common
mode of operation.
The internal transceiver also supports a forced mode of operation. You can select the
speed and mode using the ndd utility, by editing the /etc/system file, or creating
a qfe.conf file.
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