Re: Fedora 31 Network Strangeness

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On 1/31/20 10:31 AM, Tom Hughes wrote:
> On 31/01/2020 15:29, Tom Hughes wrote:
>> On 31/01/2020 15:23, Steve Dickson wrote:
>>
>>>> I know there was a change with systemd-networkd in a recent release so
>>>> that it now creates a unique but persistent MAC for bridges and maybe
>>>> other systems like NetworkManager have done the same?
>>> Hmm... this seems odd to me... any idea why this was done?
>>
>> I believe this is the relevant NEWS entry:
>>
>>    https://github.com/systemd/systemd/blob/master/NEWS#L926
>>
>> I think the idea is to ensure that a bridge always has the same
>> address, as by default it gets the address of whichever slave
>> happens to join first - that's fine in the common case where
>> there is one address added at boot and then others come and go
>> but may be non-deterministic if multiple addresses are added
>> at boot time.
> 
> Actually thinking about it the MAC address policy comes from a
> link unit so is applied by udev and isn't systemd-networkd specific.
> 
> There is an example in that NEWS entry of a link unit to turn
> this off and go back to the old behaviour.

Thanks for the info!! 

steved.
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