bridging 3 interfaces

[Donatas]

i would like to ask if it is possible to bridge in such way:

ngeth0 ------> em <-------ngeth1
(sysctl net.link.ether.bridge.config=ngeth0,em0,ngeth1)

such bridge actualy works, but allows only one session at time
that is:
ngeth0<----->em0, ngeth1 dropped
ngeth1<----->em0, ngeth0 dropped

i've also tried the following way:
sysctl net.link.ether.bridge.config=ngeth0:1,em0:1,ngeth1:2,em0:2
this time only one session works, even if ping is canceled, other session seems to be down.

how to solve this problem?

ng_bridge maybe?

thank you

      Donatas Gendvilas
      SC Lithuanian Radio And Television Center

      Data Transfers Department - N.O.C. 

      Phone: +370 5 2040444, +370 652 37580
      Sausio 13-osios st. 10, 04347 Vilnius, Lithuania