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CHAPTER 27: VIRTUALIZATION (Network Functions Virtualization …
CHAPTER 27:
VIRTUALIZATION
Virtual Machines
Software emulation of a physical server
Hypervisor
Virtualization software that creates VMs
Type 1:
"Bare-metal" or "Native"
Type 2:
Requires a host OS
Guest OS
OS that runs on the VM
vSwitch
Software-base Layer 2 switch that enables VMs to commmunicate with each other or external networks.
Containers
Isolated environment that contains a application and all the related dependencies needed to run.
Kubernetes
Containter orchestrator system
Network Functions Virtualization
Architectural framework of standards to decouple networf functions from hardware appliances
NFVI
Hardware and software components in which VNF are deployed
Hardware Resources
Compute - Storage - Network
Virtualization Layer
Virtual Compute - Virtual Storage - Virtual Network
Management and Orchestration (MANO)
Virtualized Infraestructured Manager
Manages and controls NFVI hardware resources, lifecycle and service chaining
NFV Orchestrator
Creates, mantains, and tears down VNF
VNF Manager
Manages lifecycle of one or multiple VNFs and FCAPS for the virtual components of a VNF
Element Managers (EM)
Functional management of VNFs
VNF
Virtual or software version of an NF
OVS Data Plane Development Kit (OVS-DPDK)
Libraries to accelerate packet processing workloads running on a wide variety of CPU architectures.
PCI Passthrough
Allows VNF to hace direct arrect to physical PCI
Single-Root I/O Virtualization
Enhancement of PCI Passthrough that allos multiple VNF to share same pNIC
Operations Support System/Business Support System (OBSS/BSS)
Mantain network inventory, provision new services, configure network devices and product management and billing
Cisco ENFV
MANO: DNA Center
VNFs (ISRv, ASAv, NGFWv, vEdge, etc)
NFVIS: Linux, KVM, QEMU, OVS, ESC, PnP, Orchestration (REST, CLI, NETCONF), HTTPS, RBAC
Hardware: UCS, ENCS, ISR 4000
Network Function
Function performed by a physical appliance