SP Virtualization

Question 1

What is a Network Function?

Answer 1

It is a function that is performed by a physical appliance like a router, switch, firewall, load balancer, IDS, WAN optimizer, etc. Most vendors have proprietary solutions in which hardware and software are tightly coupled.

Question 2

What is a Virtual Network Function (VNF)?

Answer 2

It is the virtual version of a hardware device’s network function. Examples: vEdge Cloud, CSR1000v, ASAV

Question 3

What is the ETSI NFV Architectural Framework?

Answer 3

European Telecommunications Standard Institute – ETSI, defined the framework that describes a standard hardware to run multivendor VNFs

Question 4

Component of ETSI NFV responsible for managing one or more VNFs

Answer 4

Element Manager - Responsible for managing one or more VNFs, it is a VM that manages the VNFs (vCenter?)

Question 5

Layer that abstracts or converts physical hardware into virtual hardware for the VNFs (VMs)

Answer 5

NFVI - Network Function Virtualization Infrastructure

Question 6

Cisco’s hypervisor software, recommended below

Answer 6

NFVIS

Question 7

The families using IOS-XR like A9k or CSR can use the _____________________ to allocate boards to different instances. The connections between SDRs must be external.

Answer 7

Secure domain router

Question 8

Software Isolated Virtual Router -  Software routing instances isolation  Share the same physical hardware • Overlay o Guest OSes run on another OS, does not scale well as it implies resource control (Type 1 Hypervisor) • Kernel o Virtualization support in the kernel allows VMs to directly access the hardware o Introduces instability to the kernel • Application o Virtualizes individual applications (Docker) o Low overhead but complex design

Answer 8

Software Isolated Virtual Router

Question 9

Hardware Isolated Virtual Router -  Dedicated hardware, boards in the chassis, therefore more expensive  Only the chassis, power, cooling are shared  No virtualization of Data or control plane  Higher resilience and security  Better management and performance  HVR is ideal for SP  Secure domain Router

Answer 9

Hardware Isolated Virtual Router