Re: kern/60592: random Mac address generation in genet Ethernet driver causes problems

The following reply was made to PR kern/60592; it has been noted by GNATS.

From: [email protected] (Michael van Elst)
To: [email protected]
Cc: 
Subject: Re: kern/60592: random Mac address generation in genet Ethernet driver causes problems
Date: Sat, 15 Aug 2026 19:14:49 -0000 (UTC)

 [email protected] ("David H. Gutteridge via gnats") writes:
 
 > I infer this is only exposed with certain firmware versions and the
 > offending bit randomly may or may not be then set, so that's probably
 > why it hasn't been addressed. (I don't have this hardware.)
 
 An RPI has a well defined MAC address even for genet. It's just that
 the loaded UEFI firmware doesn't care.
 
 N.B. the f2:00 "prefix" either needs to be set in the upper bytes
 or both places dealing with the mac address need to be adjusted
 to swap bytes.