Fail to up network interface after system boot

Hi!
I have Sun SPARC Enterprise T5140 with Solaris 10 and it unable to up network interface after boot, but after issuing ifconfig interface begins to work... svcs -xv says that service svc:/network/physical:default is failed to start and service log stores something like "service method /lib/svc/method/net-physical exited with exit status 96"... I can't find out what is the reason of this error...

looks like missconfiguration of the files for the interface... check them for typos...

how did you restart or shutdown the system ????

DukeNuke2
I faced with such issues on x86 box, but this problem disappeared without altering interface configuration files. This time I'll check all stuff once again
solaris_user
You can be sure - I make it in the right ways
init 6; reboot; init 0 - boot

hmm

shutdown -y -g0 -i6

this is how computer must me shutdown

where g is time

boot into single user shell and umount root filesystem

and then

fsck /dev/dsk/where solaris is inatalled

solaris_user
Thanks a lot for your help, but I think that the reason is not in the way I reboot the system or filesystem state... I'll check all interface configuration files, as DukeNuke2 said, and post the output...