Hi all, Here is the issue with the cluster describing below: The cluster is built with 16 nodes. All rhel5.5 86_64 bit OS. yesterday night two servers were rebooted and after that these two servers are not joining to the cluster. I was not the part of the team when it is built. and my knowledge regarding cluster is also little bit. Here is the scenario: - There is no quorum disks. But the person who has built the cluster he is telling he has executed the quorum from command line, [ i am not sure of that ] - The errors in the message log are showing as ccsd[24182]: Unable to connect to cluster infrastructure after 12060 seconds , it is a continuous error message in the log file The cluster.conf are as follows: <?xml version="1.0"?> <cluster alias="newenvt" config_version="21" name="newenvt"> <fence_daemon clean_start="0" post_fail_delay="0" post_join_delay="3"/> <clusternodes> <clusternode name="host-priv.domain.org" nodeid="1" votes="1"> <fence><method name="1"> <device name="ilo-hostr"/></method> </fence> </clusternode> ................... [ all the other nodes ]................... </clusternodes> <cman/> <dlm plock_ownership="1" plock_rate_limit="0"/> <gfs_controld plock_rate_limit="0"/> <fencedevices> <fencedevice agent="fence_ilo" hostname="hostr" login="Admin" name="hostr" passwd="xxxxxx"/> .............................[ all the fence devices for other nodes ]................ </fencedevices> <rm> <failoverdomains/> <resources/> </rm></cluster> It seems it is a very basic configuration. But at this stage more important is, to attach the two servers in the cluster environment. If more information is needed , i will provide. Any advice is appreciated. Thanks in advance -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster