To answer your question 172.x.y.z are not behind a NAT .
Moreover, I check the netstat command on the remote host and it seems like the connection is ok
tcp 0 0 10.160.x.x:39794 172.x.y.z:50858 ESTABLISHED 20956/orted
unix 3 [ ] STREAM CONNECTED 76348311 20956/orted
unix 3 [ ] STREAM CONNECTED 76348310 20956/orted
I hope it'll help
Does anyone run openmpi program in such environment ???
are the 172.x.y.z nodes behind a NAT (hence the communication back
isn't possible - only the stdout from the rsh/ssh is working in this
Actually I dont know exactly , I am asking extra informations to my network architect
Interesting thing to notice is that LAM worked in such kind of network configuration.
I keep you inform as soon as I have more infos.