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Understanding OPNFV

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Understanding OPNFV 70 reliability and scalability. Ceph's foundation is the Reliable Autonomic Distributed Object Store (RADOS), which provides your applications with object, block, and file system storage in a single unified storage cluster – making Ceph flexible, highly reliable and easy for you to manage. With cloud native architectures, the need for persistent block storage should diminish with database-as-a-service and filesystem-as-a-service; however, as VNFs are not cloud native yet, persistent block storage is useful for high availability where a pair of active-active or active- passive VNFs may want to access the same state. NFVI Virtual Switching These virtual switch and router elements provide the virtual networking or overlay layer to connect virtual machines or containers. These elements are managed by the SDN controllers. OVS The Open vSwitch (OVS) project is a Linux Foundation project. It was started in 2009 and is broadly used in the industry. It implements a virtual switch that runs in the host Linux operating system to provide virtual networking between virtual machines. OVS is a multilayer virtual switch that can be distributed across multiple physical machines, and includes security, monitoring, QoS, VLAN, VXLAN, GRE, NetFlow, sFlow, NIC bonding and automated control features. The reference implementation can be managed via OpenFlow. OpenStack Neutron, ONOS, and ODL all support OVS. vRouter OpenContrail comes with its own virtual networking technology, a vRouter, that runs in the hypervisor. It is similar to OVS, except that it can perform forwarding too, hence the name vRouter. Instead of OpenFlow, OpenContrail relies on XMPP to manage the vRouter. FD.io A high-performance alternative to OVS, the core engine of the Fast Data project (FD.io) is a vector packet processing engine (VPP) that came from Cisco.

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