Increasing Tcp/Ip Performance; To Increase Tcp/Ip Performance; Forcing Network Speed Between 10 Mbps And 100 Mbps; To Force Network Speed Between 10 Mbps And 100 Mbps - Sun Microsystems SunSwift Installation And User Manual

Increasing TCP/IP Performance

You can increase the TCP/IP performance of the SunSwift PCI adapter by changing
the TCP highwater mark to 64K. This can be done with the ndd(1M) utility as
follows.

To Increase TCP/IP Performance

As superuser, type:
# ndd -set /dev/tcp tcp_xmit_hiwat 65535
# ndd -set /dev/tcp tcp_recv_hiwat 65535
# ndd -set /dev/tcp tcp_cwnd_max 65534
The changes will take effect immediately and affect all system networking interfaces.
Forcing Network Speed Between 10 Mbps and
100 Mbps

To Force Network Speed Between 10 Mbps and 100 Mbps

1. At the ok prompt, use the show-devs command to list the system devices.
The full path name of the hme device, similar to this example, should be displayed:
/pci@1f,2000/pci@2/SUNW,hme@0,1
2. Type:
ok nvedit
3. Type the following, pressing the Return key at the end of line 0:
0: probe-all install-console banner
1: apply transfer-speed=10 <full path name of the hme device>
4. Press the Control-C keys after typing <full path name of the hme device>.
Note – In the above example, the speed is forced to 10 Mbps. To force the speed to
100 Mbps, replace with .
10 100
Chapter 3 Using the SunSwift PCI Adapter 17