Hi,
On Thu, 2015-09-03 at 11:52 +0200, laurent vaudoit wrote:
> Hi all,
> we are working on a board integrating a switch with 2 port.
> We use DSA kernel framework.
>
> On the distribution, we use systemd and connman (version 1.29)
> kernel is a 3.10.17.
>
> when the board boot, we have 3 interfaces appearing with ifconfig,
> the 3 has the same MAC ADRESS
If the three interface have the same MAC address, ConnMan will get
confused latest when saving settings for these networks. If the idea is
that ConnMan sees three different ethernet networks here, they better
have different MAC addresses also.
> eth0, lan1, lan2.
>
> lan1 and lan2 automatically get IP through dhcp.
> Everything works well until we go to suspend.
>
> When we resume, ifconfig only show eth0.
> lan1 and lan2 are not displayed, and we have to manually set lan1/lan2 up.
>
> Is there any reason for this behaviour?
Interfaces are handled entirely by the Linux kernel. ConnMan enumerates
them via rtnetlink messages. At suspend a dellink rtnetlink is received
which removes the interface from ConnMan and at resume a newlink rtnl
message is received, which re-creates the interface in ConnMan. Regular
ethernet interfaces will be connected as soon as a network cable is
connected and carrier detected on the interface.
Start by checking the flags of the interface with 'ip link show' or
'ifocnfig' before and after suspend/resume. Most likely lan1 and lan2
exist, but aren't automatically set UP and RUNNING on a resume. Are lan1
and lan2 interfaces that needed some action to be created in the first
place by the switch? Which/what actions?
Cheers,
Patrik
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