Solaris/SunOS
Solaris/SunOS

On Solaris and SunOS systems, the ethernet device is typically called le0 or ie0. In order to find the MAC address of the ethernet device, you must first become root, through the use of su. Then, type ifconfig -a and look up the relevant info. For example:
# ifconfig -a
le0: flags=863<UP,BROADCAST,NOTRAILERS,RUNNING,MULTICAST> mtu 1500
        inet 131.225.80.209 netmask fffff800 broadcast 131.225.87.255
        ether 8:0:20:10:d2:ae 

Note: Solaris and SunOS strip off the leading 0 commonly included in the MAC address. In the case of this machine, the MAC address is 08:00:20:10:d2:ae