How do this this on a client PC varies according to whether you are using Windows or Unix.
Under Windows, you typically need to go into your network connections (in Control Panel or alternately via Network and Sharing Center in Vista/Windows 7) and choose the network adapter you are interested in. Right click on it to manage its properties. Choose "Configure" button and then select the "Advanced" tab. In that window should be a setting labelled "Speed and Duplex". You specific interface may vary since the exact layout can be modified by the adapter vendors driver files.
Under Solaris OS, use the "ndd" command:
If you have ce or bge interfaces, use kstat ce and kstat bge, respectively, to return NIC settings. All other interfaces may use ndd to determine NIC settings.
ndd example with hme0, assuming "instance" is 0:
# ndd -get /dev/hme link_mode
Interpretation:
0 -- half-duplex
1 -- full-duplex
# ndd -get /dev/hme link_speed
Interpretation:
0 -- 10 Mbit
1 -- 100 Mbit
1000 -- 1 Gbit
To query a different NIC, such as hme1, set the "instance" to 1, and then perform the link_mode and link_speed queries above.
# ndd -set /dev/hme instance 1
Note: the ndd commands above must be run as root. Otherwise, you will receive errors such as "couldn't push module 'hme0', No such device or address."
Of course at the switch end, you can execute "show interface status" from the CLI and get a reply like:
#sh int status
Port Name Status Vlan Duplex Speed Type
Te1/1 notconnect routed full 10G 10GBase-LR
If the duplex or speed were auto, there would be an "a-" in the appropriate column.
