Beginning with the Solaris 2.6 Hardware: 5/98 release, the Sun Quad FastEthernet driver is bundled with the Solaris operating environment. This version of the Sun Quad FastEthernet driver is more current than the one shipped on the Sun Quad FastEthernet 2.1 CD-ROM.
If your system is running the Solaris 2.6 Hardware: 5/98 environment, or future compatible Solaris releases, do not install the software from the Sun Quad FastEthernet 2.1 CD-ROM.
If your system is running the Solaris 2.6 operating environment, and you are unsure if it is running the Hardware: 5/98 release, check the contents of the /etc/release file.
% cat /etc/release Solaris 2.6 5/98 build_id_name SPARC Copyright 1998 Sun Microsystems, Inc. All Rights Reserved. Assembled on 24 April 1998
If this file exists, and it contains Solaris 2.6 5/98, your system is running the Solaris 2.6 Hardware: 5/98 release. See "Installing the Required Quad FastEthernet Software Patches" for patch information.