Oracle, Inc. maintains hardware compatibility guides for various versions of Oracle Solaris 10* and Oracle Solaris 11 Express*. However, you should contact your system hardware vendor directly before adding an Intel® Ethernet Adapter to a certified system.
Check the I/O Compatibility Guide for your version of Oracle Solaris:
Oracle Solaris OS: Hardware Compatibility Guides
Drivers certified for use with Oracle Solaris are included in the Oracle Solaris operating system software.
Intel does not provide technical support for Oracle Solaris operating system issues.