Saturday, January 25, 2020

WoL and dynamic VLAN assignment

How do you handle Wake-On-LAN with port authentication and dynamic VLAN assignment?

You don't know which station is currently connected where, if it is switched off and currently no auth session is open (which is the point of having WoL in the first place -> switching it on).

At most you could have static "WoL-VLANs" on the ports per location (which defies the dynamic nature of device roaming or dynamically assigned VLANs). However, and assuming WoL traffic needs to be routed, you'd have to send a directed broadcast to a different broadcast address than the usual one for the devices in question. Not sure which configuration mgmt tools allow that...



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