... My other computer that runs as a Master uses the epro100 driver and never showed any error. However it seems to be doing a inifinite loop printing out the "unknown layer-3 protocol" line
You are no longer able to use some console of that system? What is the rate of that message, one per second or much more? Is it regular?
no i can't open any others because I am not using a GUI interface. When the "rtnet start" is in proccess I can't even "Alt+F2" to other consoles
Then this is actually a crash. What happens if you don't connect the master to the network? Does your system also hang?
The rate of the message if irregular.. sometime it outputs 2 at a time and sometimes none till few secs.
So, these messages are likely triggered only by the non-real-time traffic in your university networks (broadcasts...).
RTcap is just a service layer which creates a read-only linux network device to be used with standard sniffers like tcpdump or Ethereal.
So it won't be in any use if I can't get two machines communicating ? Because currently RTcap is like doing a "rtnet start" outputing "unknown layer-3 protocol"
RTcap will report ANY packet directed to and sent by the host (if in promisc mode: any packet on the wire). But, as it depends on standard sniffers, it will not work if the Linux part of your system crashes...
Did you already verified with some RTAI example if that part is running without problems?
I am not sure what RTAI example you are referring to?
Latency tests or any example from the showroom (RTAI 3.x, earlier version already come with that examples). See RTAI docs.
Ok I will try just doing a loopback. How do you transmit and receive data remotely without having RTmac and RTcfg ? a rt Ethernet driver or a normal one?
RTmac is just an optional layer between the real-time driver and the protocol stack. If you leave it out, you will still be able to transmit and receive data with your real-time applications using the same infrastructure, but you will loose the determinism due to potential collisions and congestions on the network.
RTcfg is used to setup RTmac/TDMA automatically, it is not involved in user data exchange.
I have checked out what that "unknown layer-3 protocol" mean.. But I am not sure how this error can still occur if in the manager it store all the possible protocl in a stack (or is it a queue?) Is this response normal under network is not set up between >=2 stations?
It's "normal" as long as you do not use a dedicated network without any disturbing non-RTnet traffic. You are always free to switch this warning of in the source code, it is just intended to help creating a clean setup.
Jan
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