bridging two ethernet devices on openmosix == doubles network speed ?

Hello i was thinking to connect all my nodes by cross over cable,
I would put two ethernet cards in each and bridge them.
Would look like that

 +--------+  |
 |   /eth0|---
 |br0     |
 |   \eth1|---c
 +--------+  |r
             |o
 +--------+  |s
 |   /eth0|---s
 |br0     |
 |   \eth1|---
 +--------+  |
             |
 +--------+  |
 |   /eth0|---
 |br0     |
 |   \eth1|---
 +--------+  |
             |
 +--------+  |
 |   /eth0|---
 |br0     |
 |   \eth1|---
 +--------+  |


Does this increase the network speed to the double ?
I was not realy sure so befor i start working on it maybe someone
has tried this experiment and can give me some stats.

I'm not sure what happens to all the arp ( frame forwarding ) traffic
since i had allready problems in a simular situation
( instead of ethernet i used wifi ).

Is it possibill that the bridges need to be configured to work proper,
equal thinks like the Spanning Tree Protocol ?

thanx

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