From mboxrd@z Thu Jan 1 00:00:00 1970 Message-Id: <200209051304.IAA10208@lists.linuxppc.org> From: "" To: linuxppc-embedded@lists.linuxppc.org Date: Thu, 05 Sep 2002 21:00:55 +0800 Reply-To: "" Subject: ATM issue: one Host Four Nodes Content-Type: text/plain Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: Hi all, We just have such a system to build. ________ | | RX | ATM |_TX____________________________ |---------------------------->| HOST | | | | | | | |______| | | | | ________ ________ ________ ________ | | | | | | | | | | | | TX | ATM | RX TX| ATM | RX TX| ATM | RX TX| ATM | RX | |------| NODE |<------| NODE |<-------| NODE |<------| NODE |<------| | | | | | | | | |______| |______| |______| |______| A B C D It's used to perform high speed data acqusition. ATM HOST -- a pc with an ATM card ATM NODE -- MPC860 with linux-2.4.4 The ATM HOST is responisble for sending controlling information to ATM NODEs and receiving data from each NODEs. The ATM NODE is responsible for performing data acqusition. As the diagram show,ATM NODEs are connected one after another. we use one VPI/VCI to identify one ATM NODE, so if the ATM HOST send the control message to ATM NODE D, the message will touch ATM NODE A、B、C first, then ATM NODE D. In order to improve the system capacity and efficiency, the ATM NODE A、B、C should ignore this message(not parse it) and send it to the next node, in another words, this message should be bypassed in low level(e.g. PHY level) by ATM NODE A、B、C. How can i get this point? Any advice will be greatly appreciated! Best Regards! Li ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/