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Installing SunSwift SBus Adapter Software On Solaris 2.4 and 2.5 Systems 3-11
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3.6.2 Configuring Driver Parameters
The hme device driver, which is loaded from the CD-ROM, controls the
SUNW,hme Ethernet device. The device driver automatically selects the link
speed using the auto-negotiation protocol with the link partner. (See
Section 3.6.5, “Auto-Negotiation.”)
You can manually configure the hme device driver parameters to customize
each SUNW,hme device in your system in one of three ways:
• Configure the hme driver parameters generally for all devices in the system
by entering the parameter variables in the /etc/system file.
• Set a parameter on a per-device basis by creating the hme.conf file in the
/kernel/drv directory.
• Use the ndd utility to temporarily change a parameter. This change is lost
when you reboot the system.
3.6.3 Increasing 100BASE-T Performance
The 100BASE-T performance of the SunSwift SBus Adapter can be increased by
changing the TCP hiwater marks to 64K. This can be done with the ndd utility
as follows.
1. As superuser type:
The changes will take effect immediately.
# ndd -set /dev/tcp tcp_xmit_hiwat 65535
# ndd -set /dev/tcp tcp_recv_hiwat 65535
# ndd -set /dev/tcp tcp_cwnd_max 65534