[OpenWrt-Devel] [PATCH][netifd] Bridge hairpin mode must be off by default

Dmitrijs Ivanovs dmitrijs.ivanovs at ubnt.com
Thu Sep 10 09:50:45 EDT 2015

Hi Linus!

In WDS mode, we have problems with ARP, DHCP and some other protocols
utilizing broadcast frames. So I think it's better to disable
multicast_to_unicast by default in both netifd and script.

On Thu, Sep 10, 2015 at 4:39 PM, Linus Lüssing <linus.luessing at c0d3.blue> wrote:
> Hi Dmitry,
> On Thu, Sep 10, 2015 at 04:00:39PM +0300, Dmitry Ivanov wrote:
>> [...] Enabling this mode leads to broadcast frames such as ARP and DHCP
>> being retransmitted back to AP in WDS configurations.
> Could you eloborate a little more on this? For a normal
> bridge-on-AP setting this should be fine together with the
> ap-isolation. But I'm not that familiar with WDS, I have to admit.
> Do you see duplicate broadcast packets or echoes on the
> transmitter? Or what is the issue?
> Cheers, Linus
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