Hi, We have a simple bridge setup but the ping (and other network traffic) does not work reliably. After tracing the code, it looks like a software bug. Since bridge software is been running by thousands of people. I guess I am wrong. Anyway, here is the problem. There are 2 boxes and each one has 2 interfaces, 1 ethernet and 1 wifi. STP is enabled for the bridge to avoid the loop. So the box 1 has wifi in the blocking mode. When we ping from box 1 to box 2, lots of packages lost. Ping from box 2 to box 1 does not has this problem. After we tracing the code, we noticed that the box try to using wifi to send the packages which is in blocking mode. This happens because the ath0 is returned from the forwarding database. It's implemented in __br_fdb_get(br, dest). >From the etherreal, I noticed, that the STP package is broadcast from the box 2. From the function br_handle_frame(), if a stp package is received, it will update the forwarding database. Since the STP package is sent/received by both interfaces, the wifi (blocking) received the package and update the forwarding database too. So, __br_fdb_get() will returns the wifi card sometimes. And then, the package is lost. Regards, Dengyi Wang ____________________________________________________________________________________ Moody friends. Drama queens. Your life? Nope! - their life, your story. Play Sims Stories at Yahoo! Games. http://sims.yahoo.com/ _______________________________________________ Bridge mailing list Bridge@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/bridge