Bridging and stp question

[Jedrzej Kalinowski]

pluknet pisze:
> 2009/5/28 Jedrzej Kalinowski <kalinoj1 at iem.pw.edu.pl>:
>> Hello,
>>
>> I'm using a bridge to connect tap devices used by qemu emulator to an
>> outside world.
>>
>> I run into a bit of problem however, because if I feed qemu virtual
>> machine with two tap interfaces - I need to turn on stp on them when
>> adding to a bridge to prevent a loop .
>>
>> This is probably due to improper qemu behaviour as I suppose, because I
>> does not happen when I run two qemu machines with each of them getting
>> one tap device.
>>
>> As we know from 'man ifconfig' the default behaviour for the interface
>> added to a bridge is to add it with stp protocol disabled and I have to
>> specify stp explicitly.
>>
>> My question is:
>>
>> Is there any way to configure the bridge to add stp protocol to any
>> added (via ifconfig bridgeX addm ifX) member interface - so to change
>> the default behaviour? Or specifying it explicitly is unavoidable?
>>
> 
> Let me clarify some. Did I understand you correctly
> that `ifconfig bridge0 addm ifX stp ifX` doesn't fit you needs?
> 

Well, it works fine.

It just would be more comfortable for me to do just:
ifconfig bridge0 addm ifX

and have bridge0 configured to add stp proto to each member interface as
a default action.

It would allow me to configure spanning tree on specific bridge
globally, with no need to do it for each member interface.


-- 
Jędrzej Kalinowski