[Babel-users] Detecting bridges

[Henning Rogge]

On Tue, Dec 15, 2015 at 10:35 AM, Dave Taht <dave.taht at gmail.com> wrote:
> On Mon, Dec 14, 2015 at 8:44 PM, Juliusz Chroboczek
>>> Is there a reliable way of determining that an underlying interface is
>>> a bridge?
>>
>> https://github.com/jech/babeld/blob/master/kernel_netlink.c#L723
>>
>> However, this only works for the Linux software bridge.  It doesn't work
>> for the hardware switches built into your favourite router, and of course
>> it doesn't work for switches connected over Ethernet, which is what the
>> WLAN-SI people are using.
>
> I was basically wondering if there was something like an igmp message that asked
> if this "wire" was bridged to anything.
>
> The default outside of babel towers and the yurtlab is to bridge wifi
> to ethernet.

Maybe something like this?

https://en.wikipedia.org/wiki/Link_Layer_Discovery_Protocol

Not sure how well it is supported by consumer grade switches.

Henning Rogge