error 596

I have four nodes, three are old HP server, the 4th is a new Dell server. I just added the Dell to the cluster, it seemed fine for a few days, but now I'm getting storage disconnects and the proxy detected vanished client connection errors. The GUI is slow/buggy on that server as well. I can't...

I have two nodes in on location, third in second, ttl 1 ms, but all the time i got communication error 596 with third node.