0 Replies Latest reply on Jul 7, 2015 3:02 PM by gilberdr

    ESXi 5.5.1 host suddenly missing from vCenter cluster with IVIM


      One of ten ESXi hosts running 5.5.0 dropped off the list of hosts for its cluster as displayed in Orion/NPM 11.5.2 (IVIM 2.1.0). It is polled fine by VMAN 6.3 with its data visible in that console. It can be added as a node to Orion and SNMP creds work but it does not return any resources when doing a list resources for the node. If I do an snmpwalk on the host from somewhere else, it shows the VMware data in the SNMP output. I compared it to another of the ten hosts and the SNMP output is equivalent in terms of content (ignoring instance differences). An IVIM resync or deleting and re-adding the node does not restore it to the cluster list. It can only be added as a node since it does not get detected through the vcenter polling. In vCenter it is operational and fully visible in the cluster. After being added as a node, all its VM guest's data is reported and its ESX host status is OK. Any ideas on what could have happened?