When I use option io-pkt-v4 -de1000 -pqnet -tcpip mclbytes=8192,pagesize=8192 qnet will not work.  I can see the other 
machines in /net, the other machines can see them machine. Any operation like pidin or ls will never return (even after 
5 minutes)

Even weirder is that the program that is block on the other machine, being ls or pidin is not in a REPLY stated but in a
 RUNNING stated ???

If I get rid of the mclbytwes options everything is fine. All this time tcpip works ok.

- Mario