Hi Dave, It seems multiple TCP sockets are unable to share the same port, but UDP is OK. Is this right? I created one TCP socket, bind with 5060, then try to bind another socket (V4 or V6) to 5060 too. Kernel returns 98(Address already in use). Both sockets have been set with setsockopt(REUSEADDR) before bind() call. Thanks. Guang -- To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html