Linux Ethernet Bridging - Apr 2009 - [Bridge] Building a Raw Bridge

I'm having trouble figuring out how to make a bridge that does not block 
forwarding of packets when there is no receive channel in the same 
bridge. The reason I want to do this is that the return path is via 
another circuit. The two directions are on two different radios. I would 
think this would be like the response given to someone in July 2007 
about setting a "hub" mode by setting the aging timer to 0. I tried
that
and it did not work.

I also tried a few schemes with ebtables without success either. Is 
there some relatively easy way to make the bridge forward everything and 
not cut off the transmit after a single packet?

/ Here is what one end of the link looks like.
//
//                   +-------------+
// ///      /// + eth0 +---+   bridge 1  +---+ wan0 ---> Transmit
//        |          +-------------+ 
//        |                          
//switch--+                          
//        |          +-------------+ 
//        + eth0 +---+   bridge 2  +---+ wan0 <--- Receive
//                   +-------------+
/
The WAN side uses a synchronous serial interface to the radios for 
satellite communications. The other end uses a single radio and bridge.

Mike Boutte

Hi All,
I think the little diagram of the circuit became a mess when 
transmitted. How about this attempt? This is the hub of a hub and spoke 
topology and there is normally only one transmit and multiple receivers

Here is what one end of the link looks like.

                   +-------------+

        + eth0 +---+   bridge 1  +---+ wan0 ---> Transmit

        |          +-------------+ 
        |                          
switch--+                          
        |          +-------------+ 
        + eth0 +---+   bridge 2  +---+ wan0 <--- Receive

                   +-------------+


Mike Boutte

What you described is a different interface for tx and rx.  What you've
drawn is separate tx and rx radios which are melded in the driver and expose
a single interface "wan0".  Which is it?  (If the drawing is correct,
I
don't think you have a problem at all, aside from trying to use two bridges
when you need only one)

On Sat, Apr 11, 2009 at 12:56 AM, Michael Boutte <maboutte at
pacbell.net>wrote:
> I'm having trouble figuring out how to make a bridge that does not
block
> forwarding of packets when there is no receive channel in the same
> bridge. The reason I want to do this is that the return path is via
> another circuit. The two directions are on two different radios. I would
> think this would be like the response given to someone in July 2007
> about setting a "hub" mode by setting the aging timer to 0. I
tried that
> and it did not work.
>
> I also tried a few schemes with ebtables without success either. Is
> there some relatively easy way to make the bridge forward everything and
> not cut off the transmit after a single packet?
>
> / Here is what one end of the link looks like.
> //
> //                   +-------------+
> // ///      /// + eth0 +---+   bridge 1  +---+ wan0 ---> Transmit
> //        |          +-------------+
> //        |
> //switch--+
> //        |          +-------------+
> //        + eth0 +---+   bridge 2  +---+ wan0 <--- Receive
> //                   +-------------+
> /
> The WAN side uses a synchronous serial interface to the radios for
> satellite communications. The other end uses a single radio and bridge.
>
> Mike Boutte
>
> _______________________________________________
> Bridge mailing list
> Bridge at lists.linux-foundation.org
> https://lists.linux-foundation.org/mailman/listinfo/bridge
>
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