At 1:00 AM +0200 26/5/14, Johnny Billquist wrote: Well, that is not the full story... :-) 10.1>NCP SHO NOD 10.2 COU Node counters as of 30-MAR-82 00:21:30 Remote node = 10.2 (SNAKE) 1266 Seconds since last zeroed 272319 Bytes received 1723 Bytes sent 821 Messages received 373 Messages sent 1 Connects received 4 Connects sent 0 Response timeouts 0 Received connect resource errors 2 Node maximum logical links active 10.2>NCP SHO NOD 10.1 COU Node counters as of 30-MAR-82 01:10:34 Remote node = 10.1 (SHARK) 4212 Seconds since last zeroed 13475 Bytes received 1382813 Bytes sent 2626 Messages received 5177 Messages sent 26 Connects received 2 Connects sent 73 Response timeouts 0 Received connect resource errors 3 Node maximum logical links active Summary of my last experiments: Node A & node B inside VirtualBox (Linux) : that's the configuration i am running since the beginning of this discussion. Node A & node B on a same MacMini (BSD). VirtualBox out of the loop. => same problem. Node A on a MacPro, node B on the MacMini. VirtualBox out of the loop again. => same problem. Node A inside VirtualBox Linux (MacPro), node B on the MacMini (BSD). => same problem. We can rule out VirtualBox. We can rule out a Linux/BSD/pcap problem. We can rule out running multiple nodes on the same host (MAC addresses, etc). Two versions of simh were used, 3.6 and 3.9, in Mac and Linux build. [ Note: since simh 3.7, set console pchar=37777777777 if you want to use EDT/RMD/NTD at the console, took me an hour to figure. ] -- Jean-Yves Bernier