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

[Tom Gundersen]

On Tue, Mar 18, 2014 at 10:00 AM, Henrik /KaarPoSoft
<henrik at kaarposoft.dk> wrote:
> On 03/18/2014 09:18 AM, Henrik /KaarPoSoft wrote:
>>
>> On 03/17/2014 10:32 PM, Tom Gundersen wrote:
>>>
>>> On Mon, Mar 17, 2014 at 10:21 PM, Henrik /KaarPoSoft
>>> <henrik at kaarposoft.dk> wrote:
>>>>
>>>> Hi Tom,
>>>>
>>>> Thanks for your feedback...
>>>>
>>>> I was briefly looking through git commits after 211 without finding
>>>> anything
>>>> related. But then again I did not look into too much detail.
>>>>
>>>> Do you know which commit would solve this?
>>>
>>>
>>> Ah, this was not obvious at all. This was almost certainly fixed as a
>>> side-effect of refactoring the rtnl_message_read_*() code, so if you
>>> pull in 9842de0d93d and the commits it relies on that should do it (I
>>> haven't verified that that's the culprit, but it seems likely from
>>> looking at it).
>>>
>>> Cheers,
>>>
>>> Tom
>>>
>> Tom,
>> As far as I can see, 9842de0d93d was already included in 211.
>> I have rebuild my systemd from the head of git 4dd5da7f.
>> And the problem remains )))-:
>> /Henrik
>
>
> As a quick hack, I tried this:
>
> cat > /etc/systemd/network/42-br0.link<<EOF
> [Match]
> Type=bridge
> [Link]
> MACAddress=10:bf:48:d7:68:e1
> EOF
>
> And now I get an IP address by DHCP, and I have connectivity.
>
> But hard-coding the MAC is hardly a viable long-term solution...

Yeah, that's not going to fly.

Could you attach the full debug output of a failing run? To get it,
you probably want to stop systemd-networkd, "ip link del" the bridge,
and start networkd from the commandline:

# SYSTEMD_LOG_LEVEL=debug /lib/systemd/systemd-networkd

I think I understand what's going on, but I'd like to have it verified
before changing anything.

Cheers,

Tom