The machine appears to already be configured but I assume that it is configured incorrectly for your environment. If you're moving to a totally different environment (where everything is likely to be wrong), probably the easiest approach is to run sys-unconfig and answer the questions which pop up after rebooting the system. The sys-unconfig command causes Solaris to forget its configuration and prompt you for configuration information on the next reboot. It should know about the le0 interface so you don't have to worry about it. You will be asked to enter things like the machine name, IP addresss, subnet information, name service information, default router, time zone, root password, etc. so you should have that information at hand.
The sys-unconfig command does tweak a lot of files. If you can, it would be a good idea to back up the system before running this just in case something goes amiss. I've not had problems with it but just in case...
Thanks for your response.
But, I need configure VLAN. Now, I have a correct LAN configuration (le0), working ok. My problem is what is the method to configure vlan on this type of driver (le).
Any person, write in a forum: "interface types that support VLANs are: ce, bge, xge, e1000g". le is not in the list.
For bge, in a v240 (modern) machine, I need to apply a patch. The problem is: I need know if I can configure vlan in le driver before to do it, to include the method in the plan of migration of all lan.