Windows 10 Random Mac Address

Phil Mayers p.mayers at
Tue Sep 1 17:39:30 CEST 2015

On 01/09/15 13:31, Alan DeKok wrote:

> Yeah.  The client sends a DHCP discover, and the switch ignores it...
> because it's waiting for EAP!
> My suspicion is that most switch vendors hire engineers who know
> nothing about networks, and who don't use the equipment they're
> building.

The weird thing about this is that equipment varies dramatically in how 
it handles this.

For example, the now-ancient 3Com 4400s handled this very well indeed; 
they treated non-EAP traffic as macauth, until the first EAP packet from 
a given source MAC, at which point they toggled a soft-state bit, making 
that MAC/port combo "EAP required", and clearing the state at link-down.

Worked very well.

Juniper handle this poorly - if you force macauth-only they macauth 
straight away, otherwise you wait NxM (N=configurable, M=EAP timeout) 
which is almost always longer than you want to wait for DHCP to complete 
on a non-EAP device :o/

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