Note: Any changes made with ndd will be lost when you reboot the system. To make configuration changes survive reboot, store driver settings in the /etc/rc2.d/S99itialt file (see Saving Driver Parameters Beyond Reboot).

Link Negotiation

The default configuration for link negotiation of the Gigabit Ethernet link is auto . With this setting the ITI-5100G/GF adapter will use IEEE 802.3- 1998 auto negotiation.

If you are connecting the adapter to Gigabit Ethernet equipment that does not support auto negotiation, or if there is a problem establishing a link between the two devices, auto negotiation can be turned off (see Available Parameters).

Increasing TCP/IP Performance

The TCP/IP performance of the ITI-5100G/GF PCI adapter can be increased by changing the TCP/IP ndd values. This can be done with the ndd (1M) utility, as described below.

Enter the following ndd commands to increase TCP/IP performance:

#ndd -set /dev/tcp tcp_recv_hiwat 65535

#ndd -set /dev/tcp tcp_xmit_hiwat 65535

#ndd -set /dev/udp udp_recv_hiwat 65535

#ndd -set /dev/udp udp_xmit_hiwat 65535

To avoid losing these settings when reboot occurs, add your ndd parameter settings to the start-up file as described in the following section, Saving Driver Parameters Beyond Reboot.

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