All vCloud NFV platform components implement a high availability design by default. In addition, VNF's can take advantage of platform capabilities to extend their availability in compute, storage, and networking.
vSphere High Availability
Redundancy with vSphere uses VM level replicas in conjunction with the VNF high availability architecture. vSphere HA can restart a VM on another host in the event of host failure thus providing redundancy for a VNF and VNFC pair. vSphere HA can be fully automated without the need for manual intervention for failure and recovery.
VMware NSX-T Data Center Availability
NSX-T Data Center by default provides high availability to VNFCs in the overlay network. NIC Teaming and protocols such as Equal-Cost Multipath (ECMP), Graceful Restart, and Link Aggregation Group (LAG), provide redundant connectivity. The NSX-T architecture also separates management, control, and data plane traffic to further optimize service availability.
VMware vSAN
vSAN is fully integrated in vSphere and provides policy-driven fault handling with platform awareness such as chassis and rack affinity to store object replicas. The virtual storage is integrated with vRealize Operations so that in case of failure, the failed VM can be cloned and spun up automatically. Storage vMotion can be used to perform live migration of virtual machine disk files (VMDK) within and across storage arrays by maintaining continuous service availability and complete transaction integrity at the same time.
