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.

Additional information
Solaris Hardware Compatibility Guides
Oracle Solaris support
Oracle Solaris communities

This applies to:

EtherExpress™ 10 ISA adapter EtherExpress™ 16 Adapter EtherExpress™ 32 Adapter EtherExpress™ 32N Adapter EtherExpress™ Classic Adapter EtherExpress™ Flash 32 Adapter EtherExpress™ PRO/10 and PRO/10+ ISA adapters EtherExpress™ PRO/10 PCI Adapter EtherExpress™ PRO/10+ PCI Adapter Intel® 10 Gigabit AF DA Dual Port Server Adapter Intel® 10 Gigabit AT Server Adapter Intel® 10 Gigabit AT2 Server Adapter Intel® 10 Gigabit CX4 Dual Port Server Adapter Intel® 10 Gigabit XF LR Server Adapter Intel® 10 Gigabit XF SR Dual Port Server Adapter Intel® 10 Gigabit XF SR Server Adapter Intel® Ethernet Converged Network Adapter X520 Series Intel® Ethernet Converged Network Adapter X540-T1 Intel® Ethernet Converged Network Adapter X540-T2 Intel® Ethernet Server Adapter I210-T1 Intel® Ethernet Server Adapter I340-F4 Intel® Ethernet Server Adapter I340-T4 Intel® Ethernet Server Adapter I350-F2 Intel® Ethernet Server Adapter I350-F4 Intel® Ethernet Server Adapter I350-T2 Intel® Ethernet Server Adapter I350-T4 Intel® Ethernet Server Adapter X520 Series Intel® Ethernet Server Adapter X520-DA2 Intel® Ethernet Server Adapter X520-LR1 Intel® Ethernet Server Adapter X520-SR1 Intel® Ethernet Server Adapter X520-SR2 Intel® Ethernet Server Adapter X520-T2 Intel® Gigabit CT Desktop Adapter Intel® Gigabit EF Dual Port Server Adapter Intel® Gigabit ET Dual Port Server Adapter Intel® Gigabit ET Quad Port Server Adapter Intel® Gigabit ET2 Quad Port Server Adapter Intel® InBusiness™ 10/100 Adapter Intel® PRO/100 Intelligent Server Adapter Intel® PRO/100 ISA Adapter Intel® PRO/100 M Desktop Adapter Intel® PRO/100 PCI and EISA Adapters Intel® PRO/100 S Desktop Adapter Intel® PRO/100 S Dual Port Server Adapter Intel® PRO/100 S Management Adapter Intel® PRO/100 S Server Adapter Intel® PRO/100 Smart Adapter Intel® PRO/100 VE Desktop Adapter Intel® PRO/100 VE Network Connection Intel® PRO/100 VM Network Connection Intel® PRO/100+ Adapter Intel® PRO/100+ Dual Port Server Adapter Intel® PRO/100+ Management Adapter Intel® PRO/100+ Server Adapter Intel® PRO/1000 CT Network Connection Intel® PRO/1000 F Server Adapter Intel® PRO/1000 Gigabit Server Adapter Intel® PRO/1000 GT Desktop Adapter Intel® PRO/1000 GT Quad Port Server Adapter Intel® PRO/1000 MF Dual Port Server Adapter Intel® PRO/1000 MF Server Adapter Intel® PRO/1000 MF Server Adapter (LX) Intel® PRO/1000 MT Desktop Adapter Intel® PRO/1000 MT Dual Port Server Adapter Intel® PRO/1000 MT Quad Port Server Adapter Intel® PRO/1000 MT Server Adapter Intel® PRO/1000 PF Dual Port Server Adapter Intel® PRO/1000 PF Quad Port Server Adapter Intel® PRO/1000 PF Server Adapter Intel® PRO/1000 PM Network Connection Intel® PRO/1000 PT Desktop Adapter Intel® PRO/1000 PT Dual Port Server Adapter Intel® PRO/1000 PT Quad Port Low Profile Server Adapter Intel® PRO/1000 PT Quad Port Server Adapter Intel® PRO/1000 PT Server Adapter Intel® PRO/1000 T Desktop Adapter Intel® PRO/1000 T Server Adapter Intel® PRO/1000 XF Server Adapter Intel® PRO/1000 XT Low Profile Server Adapter Intel® PRO/1000 XT Server Adapter Intel® PRO/100B Adapter Intel® PRO/10GbE CX4 Server Adapter Intel® PRO/10GbE LR Server Adapter Intel® PRO/10GbE SR Server Adapter NetEffect™ Ethernet Server Cluster Adapters