On Wed, Mar 03, 2004 at 04:15:31PM +0530, Bhojani, Komel (IE03x) wrote: > I am using Linux-2.4-24/RTAI-3.0/comedi-0.7.67 and I need to know > some things about RTnet. Plzz clarify on these things. > -Am I able to send data using tcp/ip to any other machine on the network or > is it necessary to have rtnet on the other side??
tcp/ip is by design not realtime capable, thus RTnet provides a udp/ip hard realtime stack only. if you don't use RTmac there are true udp/ip packets on the wire, but the resulting network has no hard realtime qualities due to possible collision in shared (hub) environments or congestions in switched ones. with the help of the legacy proxy modul, the tcp/ip traffic comming from normal linux is sent though the realtime NIC. but this results in even worse realtime qualities... > -I compiled and installed rtnet but I am not able to figure out what > should be my configuration ? I am confused abt TDMA and rtmac ? > r they necessary for just sending and receiving tcp/ip packets over the > network. If you want to connect 2 or more RTnet boxes you should use RTmac. With the vnic modul you have the whole traffic generated under linux tunnled trough the net w/o disturbing the realtime packets generated within RTnet's udp/ip stack. > -I loaded modules for loopback and 8139too-rt but not able to ping to > either 127.0.0.1 or ip which I had set thru /etc/rtnet.conf > What is missing?? If you setup your system w/o RTmac your RTnet box can only answer to pings, but not send one because we have not written a ping utility that uses our stack yet. Have a look into the examples dirs for roundtriptime measuring examples.... hth marc -- #!/bin/sh set - `type $0` 'tr "[a-zA-Z]" "[n-za-mN-ZA-M]"';while [ "$2" != "" ];do \ shift;done; echo 'frq -a -rc '`echo "$0"| $1 `'>$UBZR/.`rpub signature|'`\ echo $1|$1`'`;rpub "Jr ner fvtangher bs obet. Erfvfgnapr vf shgvyr!"'|$1|sh ------------------------------------------------------- SF.Net is sponsored by: Speed Start Your Linux Apps Now. Build and deploy apps & Web services for Linux with a free DVD software kit from IBM. Click Now! http://ads.osdn.com/?ad_id=1356&alloc_id=3438&op=click _______________________________________________ RTnet-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/rtnet-users
