Wake on Lan feature is not availble in symantec.
https://www-secure.symantec.com/connect/forums/how-do-i-make-sep-wake-computer-sleep-scheduled-scan
https://www-secure.symantec.com/connect/forums/whether-wake-lan-available-sepm-12x
#Edit#
Idea has already been raised
https://www-secure.symantec.com/connect/ideas/scan-machines-set-hibernation-mode
https://www-secure.symantec.com/connect/ideas/add-wol-sepm