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Hi all, I have got very strange behavior of our installation. Let me describe it: We had some problems on one of Cisco switch boards where is also connected our redirector node. There was discovered these lines in olb log file during the crash of network : Example for one node: 060128 19:09:30 20424 olb_GetLine: Unable to read request; no route to host 060128 19:09:30 20424 olb_Manager: rcas6150:1095 scheduled for removal; not responding This node "rcas6150" didn't recover a connection to the redirector olbd server anymore, but the olbd proccess is stil running on that node. And when someone tried to request the file from that node then he wasn't redirected to that node, even the file is there. If the olbd process is restarted on that node, everything is in on order and the user is redirected to that node and file is opened. You can simulate this strange behavior by giving wrong numbers (means value greater than 100 etc.) of load, io etc. to redirector node. Then node is scheduled for removal .... Thanks for a advice Let me know if you need something Pavel