Introduction to feature

Wake-on-LAN (WOL) is an Ethernet computer networking standard that allows a computer to be turned on or awakened by a network message. The message is sent by a program executed on the same local area network. Messages can also be initiated from another network by using subnet directed broadcasts or a WOL gateway service. WOL is implemented using specially designed packet called magic packet. WOL is enabled on the switch by using a ip directed-broadcast command with an IPv4 configuration, which can be used to specify an access-list name, thus avoiding unnecessary administrative overhead.

IP directed-broadcasts would only be forwarded if permitted by the associated access-list. An implicit deny at the end of an access list drops all IP directed-broadcasts that are not authorized according to the access list entries.