Status: I have reduced my cluster to 2 nodes, Cleaned up all previous install of gfs, re-compiled and installed kernel 2.6.9, re-compiled and installed gfs Still the same problem. Is it because I am using eth1 for cluster communication ? I was using broadcast before on eth1. Here is my cluster.conf: <?xml version="1.0"?> <cluster name="tfsm" config_version="1"> <cman> </cman> <nodes> <node name="l1_oas56_a" votes="1"> <fence> <method name="MCdata"> <device name="switch" port="6"/> </method> </fence> </node> <node name="l1_oas56_b" votes="1"> <fence> <method name="MCdata"> <device name="switch" port="7"/> </method> </fence> </node> </nodes> <fence_devices> <device name="switch" agent="fence_mcdata" ipaddr="192.168.10.208" login="Administrator" passwd="xxxxxx"/> </fence_devices> </cluster> Any idea ? I am lost... -- Arnaud Gauthier 247 Real Media