Virtualization - Network Functions Virtualization
10 important questions on Virtualization - Network Functions Virtualization
What does the NFVI Virtualized Infrastructure Manager (VIM) do?
As well as Service Chaining, which is the process of chaining VNFs together to provide an NFV service or solution.
What are Element Managers (EMs)?
What are 3 I/O technologies that are used to bypass the CPU for network processing?
2. PCI passthrough
3. Single-root I/O virtualization (SR-IOV)
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How does OVS-DPDK work?
Because it is then already in the User Space it can be directly switched to the VNF.
How does PCI Passthrough work?
Because of this the physical device is dedicated to the single VNF.
How does SR-IOV work?
The emulated PCIe devices are called Virtual Functions (VFs)
And the physical PCIe devices are called Physical Functions (PFs)
What two modes does an SR-IOV enabled physical NIC support for switching traffic between VNFs?
2. Virtual Ethernet Port Aggregator (VEPA) (Traffic between VNFs attached to the same pNIC is switched by an external switch)
What is Cisco Enterprise Network Functions Virtualization (ENFV)
Managed through Cisco DNA Center
What 4 components, based on the ETSI NFV architectural framework, does the Cisco ENFV solution architecture consist of?
2. VNFs (Virtual Network Functions)
3. Network Functions Virtualization Infrastructure Software (NFVIS) An Operations System that provides virtualization capabilities.
4. Hardware resources (x86-based computer resources)
What Cisco x86 based platforms can Cisco Enterprise NFVIS be hosted on?
2. Cisco Cloud Services Platforms
3. Cisco 4000 series ISRs with a Cisco UCS E-Series blade
4. UCS C Series
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