[systemd-devel] systemd-networkd bridge with DHCP not working

[Umut Tezduyar Lindskog]

On Fri, Mar 21, 2014 at 7:02 PM, Tom Gundersen <teg at jklm.no> wrote:
> On Fri, Mar 21, 2014 at 9:57 AM, Patrik Flykt
> <Patrik.Flykt at linux.intel.com> wrote:
>> On Thu, 2014-03-20 at 20:29 +0100, Tom Gundersen wrote:
>>> My proposal is:
>>>
>>> Whenever the MAC address changes under us networkd calls
>>> sd_{dhcp_client,ipv4ll}_set_mac(), and it is the libs' responsibility
>>> to then do the right thing.
>>>
>>> Currently the libs don't support this and will fail with EBUSY, so I
>>> suggest we change that into letting them restart themselves
>>> internally, and send out notifications that the lease has been lost
>>> (so networkd will drop the addresses correctly, if it has any
>>> assigned).
>>>
>>> Umut, Patrik, what do you think?
>>
>> Yes, let's fix the library to take care of a changing MAC address.
>
> I now made this change in git for both libraries.

Thanks for making the change.

>
> It seems to me that the kernel could behave better when enslaving
> devices to a bridge (i.e., bring down the bridge before changing its
> mac address, rather than first changing the mac address and then bring
> the bridge down/up), but this should be fairly robust from our side,
> regardless of what the kernel does.
>
> Cheers,
>
> Tom
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