cannot contact specified host. the host may not be available on the network, a network configuration problem may exist, or the management services on this host may not be responding.
Cannot contact the specified host. The host may not be available on the network, a network configuration problem may exist, or the management service on this host is not responding . This is because, with 5.5 U3b SSLv3 is disabled, however, on a vCenter that is on a version lower than 5.5 U3b has SSLv3 enabled. To resolve this, the best method would be to upgrade your vCenter to 5.5 U3b. If you do not want to upgrade vCenter, then you can enable SSLv3 on that upgraded ESXi host.