In SunVTS 3.0 the sunlink test runs on HSI SBus and PCI type cards, however the SunVTS 3.0 Test Reference Manual only refers to the HSI SBus test capabilities.
A valid sunlink command line example is shown below:
# /opt/SUNWvts/bin/sunlink -o dev=hih0,P=0+1+2+3
This command line tests the internal loopback for ports 0, 1, 2, and 3. The internal loopback should not be run in the port to port loopback setting.