Cluster : The Cisco UCS cluster is a grouping of hypervisors that can be distributed across multiple hosts. In a KVM system, the cluster is analogous to the distributed virtual switch (DVS) in a VMware ESX system.
In the current Cisco UCS KVM implementation, the cluster defines the scope of the port profile and is the boundary of the migration domain. When multiple KVM hosts are associated to a cluster, you can migrate a VM from one host to another within the cluster.
Note : In the current Cisco UCS implementation of VM-FEX for KVM, only one cluster, the default cluster, is used. Although you can create additional clusters, you can specify only the default cluster for a VM on the KVM host.
Port Profiles : Port profiles contain the properties and settings that are used to configure virtual interfaces in Cisco UCS. The port profiles are created and administered in Cisco UCS Manager. After a port profile is created, assigned to, and actively used by a cluster, any changes made to the networking properties of the port profile in Cisco UCS Manager are immediately applied to the cluster with no need for a host reboot.
Port Profile Client : The port profile client is a cluster to which a port profile is applied.
Note : In the current Cisco UCS implementation of VM-FEX for KVM, the default cluster is the only available port profile client.
