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Rev.A Wake On LAN Appendix 3-5
Developer's Guide SR-600
Confidential
Function Details
Wake on LAN Sequence
The descriptions of the Client Wakeup Sequence from the Wake on LAN is listed below:
1)Wakeup Frame (such as Magic Packet) is sent to the Network from the host.
2)The client Network Adapter receives Wakeup Frame.
3) The client defines whether its Wake on LAN setting is enable or not.
If it set at disable, the rest of the process is not operated.
Also, this setting is normally stored in CMOS.
4) Decode the destination of the Wakeup Frame received
MAC Address, that is a specific address provided to the each client, is used for the decode.
If this address is included in the received Wakeup Frame, it means that the client requested
the Wakeup.
5) Wakeup Signal issue
If the Wakeup Frame is found, it issues Wakeup Signal. If it’s not found, the process is not
peformed.
6) Client Power On
7) Normal Bootup
The normal POST(BIOS bootup) is performed like Power On by Front Switch.
Wakeup Frame
It is a Network data to wakeup the client from the host using the Wake on LAN function. The
special Data Field different from the Packet Data transmitted on the normal Network is
included. Wakeup Frame is decoded by the client’s Network Adapter compliant with the Wake
on LAN and defined as event issued by the Wakeup Signal. The Wakeup Frame Format is
shown in the table below.
In addition, the Data Field is defined as special that the Client MAC Address is repeated for 16
times in the Address Field after the Hardware Synchonism Field. For example, the Client
Wakeup Frame that carries that carries [11h, 22h, 33h, 44h, 55h and 66h] MAC address is a
Packet Data as explained in the table below.
Data Field
DA SA MISC-1 Synchronism Field Addr ••••• Addr MISC-2 CRC