Lets get back to the original post.
One server three nodes. Nodes are not able to connect to each other on the same server.
My guess:
1) loopback IP's are getting blocked or miss routed.
2) Server loses integrity over time
2)app_rpt is not reading the node stanza in rpt.conf.
What does Asterisk cmd say when the error presents itself? i.e. when you try to connect one node to another? Verbose should be high.
You can turn on logging. /etc/asterisk/logger.conf
messages => notice,warning,error,debug,verbose
"Be warned that logging could fill your hard drive fast"
Is there any other services on this server?
David
KE6UPI