larryd@bmerh140.bnr.ca (Larry Dunkelman) (02/10/91)
I have setup SLIP between a 3100 and 5810 system. I am able to 'rlogin' and 'telnet', etc. just fine, but after a short time (varies between 10 seconds and 5 minutes), the session seems to hang. This happens with both rlogin and telnet. 'ftp' also hangs. Here is a dump of what I know and what I have tried: After my session hangs, I can re-establish another session which will eventually hang as well. Doing a netstat -i on both systems, I can see the 'sl0' device. I notice that there is a small number of both input and error packets. After I exit a 'hung' session, the 'rlogind' (or 'telnetd') process hangs around, but the 'csh' process is killed. Since the documentation is pretty thin, most of what I have done is via trial and error. I have a 'getty' process running on the port on the slave machine in order for 'slip' to login. But, after it runs /usr/new/slattach, the getty is still running on the port. I get some syslog messages like: '/dev/tty01: mount device busy' -- I assume that the getty process can't get access to the port and fails. So, I set the status of the port to 'off' in /etc/ttys and restarted init (kill -1 1). After this the messages in syslog stop, but I still get hung sessions. My configuration: DEC 3100 Ultrix 3.1 | /dev/tty00 (one of the serial ports) | async - sync converter | 9600 baud sync modem | | (telco supplied sync circuit) | 9600 baud sync modem | async - sync converter | /dev/tty01 (a port on a dmb - 8 port mux) | DEC 5810 Ultrix 4.0 Any clues ? Larry Dunkelman Bell-Northern Research (Montreal) E-mail: larryd%bnrmtl@larry.mcrcim.mcgill.edu