MAC address of bridge interfaces
I upgraded a Debian machine from stretch to bullseye and see
a change of the IP address of a ethernet bridge interface.
The bridge has a physical LAN interface as one fixed bridge port
and additional ports for kvm virtual machines I may start.
Before the upgrade the bridge interface got its MAC address from
the physical LAN interface. With Bullseye this is no longer the
case. Instead, the MAC address seems to be generated "somehow".
At least, this new address is fixed and doesn't change on each
reboot.
But how is that MAC address generated? Is it stored somewhere?
Can I set it to an address of my own preference?
And why was this changed, why don't we still use the address of
the physical port connected to it?
Steve
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