Hi, > > I have to do some ATM traffic switching > > I'm not sure what you mean by "traffic switching." The 603 core > needs to be involved for some management of the connections. I've > done custom Ethernet bridging applications over ATM using the AAL5 > and it has worked well.
Management is fine, but I do not want core to process traffic. In case of AAL2, itcan be programmed to do switching and switching will happen automatically in CPM. For AAL0 this is from 8260 manual: "Automatic data forwardingcan be used to switch AAL0 cells from one ATM port to another without core intervention". (29.9.8 ATM-to-ATM Data Forwarding). No mention of AAL5, though. > > With AAL5 you just hand the CPM a PDU for transmit, and the receiver > returns the PDU in the receive buffer. The CPM does all of the cell > fragmentation, CRC and length checks, and header processing. > > There are many nice features of this ATM controller, including things > like bit rate and cell scheduling. I suspect the whole of > the Linux ATM > software can be done by the CPM (and then some), all we need is a data > path and control interface. Yes, ATM controller is very powerful and flexible. Motorola did a good job! Rudolf ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
