HP Wireless Wakeup - Technical whitepaper
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Technical white paper | HP Wireless Wakeup
Microsoft introduced a new system power mode, Modern Standby, with Windows® 10. A system that supports Modern
Standby Connected/Disconnected does not expose the power management option of the network adapter to the end
user, so it cannot be congured to support wake using magic packets.
1.5 Network support and conguration
When a notebook client is in a power-saving state, the OS IP network stack is no longer active, so it may not be able
respond to any Address Resolution Protocols (ARPs) from a router. Hence, a wakeup magic packet must be transmitted as
a local subnet broadcast packet addressed with a client’s wireless adapter MAC address. The network administrator must
congure network devices and rewalls so that the wakeup magic packet is not blocked.
A system in a broadcast domain (subnet) can be assigned as a wake server to generate the broadcast wakeup packet.
Generally, there is no issue if the targeted client computer to be awakened is in the same subnet as the server. If the
wake server does not reside in the same broadcast domain, then the network must be congured to enable and forward
directed broadcasts to allow wakeup magic packets to traverse broadcast domains.
Modern enterprise WLAN networks often block broadcast traic to prevent denial-of-service attacks. Directed broadcast
capability is typically disabled by default. The congurations of various network environments and equipment are
beyond the scope of this whitepaper. It is advisable to contact the wireless network infrastructure provider to assist in
the conguration for a specic network design to enable WoWLAN and to limit the direct broadcast traic to only specic
sources, such as the wake server’s IP address.
An example of network conguration:
https://www.cisco.com/c/en/us/support/docs/switches/catalyst-3750-series-switches/91672-catl3-wol-vlans.html