On Sun, Feb 23, 2014 at 2:33 AM,  <[email protected]> wrote:
>
> Hi,
>
> Recently discovered that embedded Intel 82576 adapters are not functioning
> correctly with the newer igb driver that is included in 3.10.x series of
> kernels (well I tested with versions 3.10.25, .30 and .31) and openvswitch.
>
> Tested on Gentoo host with openvswitch-2.0.0-r3 package installed.
>
> We use the package provided module instead the one embedded with kernel
> sources. Though tested with the kernel provided module with similar results.
>
> Downgrading kernel to 3.4.81 will work fine.
>
> Normally we use the two ports in the 82576 adapter in bonded configuration.
> While testing dropped the bonding configuration and used only one adapter
> connected (without LACP conf) to switch.
>
> While testing we have a simple openvswitch configuration on the host:
>
>     Bridge "br0"
>         Port "enp1s0f1"
>             Interface "enp1s0f1"
>         Port "v70"
>             tag: 70
>             Interface "v70"
>                 type: internal
>
> There is an ip address assigned on internal adapter v70.
>
> With 3.10.x series kernel the interfaces appear just fine, on the switch
> (d-link x-stack) side we can see that v70 MAC address has been registered
> but with tcpdump on enp1s0f1 can see only one way ARP traffic (out). Nothing
> on the receiving side.
>
> Tested also with an other Intel adapter in same host (Intel 82544EI). *This
> worked fine*. I guess this one uses e1000 driver?
>
> Is this a bug in igb driver or something else?

If you think that this a problem with the igb driver then the Intel
driver mailing lists or netdev might be more likely to give you a
useful response. It could also be related to vlan tags - those have
had problems in the past but shouldn't be an issue at this point.
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