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Title
How does the K1000 Wake on LAN work? -
Description
A device supporting Wake-on-LAN keeps it's network port powered up and is listening for a specific pattern that includes 6 bytes of all hexadecimal FF, followed by the device's MAC address repeated 16 times. Since the device doesn't have an IP address when it is in this state, the typical way to get a wake-up frame delivered is to send a broadcast packet to the subnet that the machine is sitting on. This wake-up frame can be encapsulated in any protocol.
This article briefly discusses how to use the Wake-on-Lan function on a K1000 appliance version 6.xx
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Resolution
The K1000 appliance implementation encapsulates the wake-up frame in a UDP packet sent to port 9 on a number of broadcast addresses. We use the device's last known IP address and loop over the possible subnets from */16 to */32, sending a packet to the broadcast address for each subnet. A lot of these packets will "miss" because they're not correct. The K1000 appliance does it this way to avoid requiring the user to enter the subnet for each address. Note that when we send to the /32 subnet, the K1000 is directly addressing the device.
Here are the steps to issue Wake-on-LAN requests:
1 Log in to the K1000 adminui: http:///admin. Or, if Organization Fast Switching is enabled, select an organization in the drop-down list in the top-right corner of the page.
2 Navigate to: Distribution | Wake-on-LAN. The Wake-on-LAN page appears.
3 To wake multiple devices, select a label in the drop-down list next to Labels.
4 To wake computers individually:
a. From the "Choose Action" drop-down, select New->Simple. Select the system from the "Managed Devices" or "Discovered Devices" drop- downs, or enter the IP or MAC address of the machines you want to wake.
b. To filter the list, enter filter criteria.
5 To wake a network device:
a. In the Wake a Network Device or Discovered Devices section, select the devices you want to wake.
b. To filter the list, enter filter criteria.
6 Click Run Now. The results at the top of the page indicate the number of machines that received the request and the label, if any, to which those machines belong.