ETSI NFV Management and Orchestration - An Overview - IETF

14 Pages·2014·0.78 MB·English

by  Maddy Conner

ETSI NFV Management and
Orchestration -
An Overview

Mehmet Ersue
ETSI NFV MANO WG Co-chair
([email protected])

IETF #88, Vancouver, Canada
Virtualization as a Paradigm
Virtual Network Functions (VNF)

Virtual Virtual Virtual Virtual
Examples of VNFs:
Machine Machine Machine Machine

Virtualiz •  Switching: BNG, CG-NAT, routers.
Guest Guest Guest Guest
ation
OS OS OS OS and •  Mobile network nodes: HLR/HSS,
Applicati
MME, SGSN, GGSN/PDN-GW, RNC.
on

Guest Guest Guest Guest Manage •  Home routers and set top boxes.
Appli c Appli c Appli c Appli c ment
ation ation ation ation
•  Tunnelling gateway elements.

•  Traffic analysis: DPI.

•  Signalling: SBCs, IMS.

•  Network-wide functions: AAA servers,
IaaS

policy control.
NaaS Hyperviso r CAloPuI d •  Application-level optimisation: CDNs,
VNF NF
VNC Load Balancers.
Host OS

NC NF VN VN VN Cloud •  Security functions: Firewalls, intrusion
Hardware Stack,
Open detection systems.
Stack

NF: Network Function
VNF: Virtual Network Function
NC: Network Controller
VN: Virtual Network
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Network Function Virtualization
Components
E2E Network Service
End End
Network Service
Point Point
Logical
VNF Forwarding
VNF VNF
Abstractions
Graph aka.
Service Chain
VNF VNF VNF
Logical Links
VNF Instances
SW Instances
VNF VNF VNF VNF
VNF : Virtualized Network Function
NFV Infrastructure (NFVI)
Virtual Virtual Virtual
Virtual Resources
Compute Storage Network
Virtualization SW Virtualization Layer
HW Resources Compute Storage Network
3
Example of an E2E Network Service with
VNFs and nested VNF Forwarding Graphs
End-to-end network service
VNF-FG
VNF-FG-2
VNF-
VNF-
2B
2A
PNF-3 End
VNF-1
Point
End VNF-
Point 2C
Virtualisation Layer
Hardware
Legend Resources
in Physical
Locations
NFVI-PoP
Physical link
Logical link
Virtualisation
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Source: ETSI NFV E2E Architectural Framework
MANO Functional Blocks
•  NFV Orchestrator:
–  on-boarding of new Network Service (NS), VNF-FG and VNF Packages
–  NS lifecycle management (including instantiation, scale-out/in,
performance measurements, event correlation, termination)
–  global resource management, validation and authorization of NFVI
resource requests
–  policy management for NS instances
•  VNF Manager:
–  lifecycle management of VNF instances
–  overall coordination and adaptation role for configuration and event
reporting between NFVI and the E/NMS
•  Virtualised Infrastructure Manager (VIM):
–  controlling and managing the NFVI compute, storage and network
resources, within one operator’s infrastructure sub-domain
–  collection and forwarding of performance measurements and events

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NFV Management and Orchestration Architecture
Os-Nfvo

OSS/BSS NFV Orchestrator (NFVO)

Or-Vnfm
NS VNF NFV NFVI
Catalog Catalog Instances Resources
VeEn-Vnfm

EMS
VNF Manager

(VNFM)
VeNf-Vnfm

VNF
Vnfm-Vi

Vn-Nf Or-Vi
Virtualised
Infrastructure
Nf-Vi
NFVI Manager
(VIM)
NFV-MANO

Execution reference points Other reference points Main NFV reference points
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Source: ETSI NFV MANO WI document (ongoing work)
NFV Entities to deploy and manage
•  Network Service (NS):
– described by its descriptor file, orchestrated by NFVO,
– may cover 1 or more VNF Graphs, VNFs and PNFs.
•  VNF Forwarding Graph (VNF-FG):
– described by its descriptor file, orchestrated by NFVO,
– may cover VNF-FGs, VNFs and NFs
•  VNF:
NetworkService
– described by its descriptor file, instantiated by
the VNF Manager,
– covers VNF components (VNFC) each mapped 1
to a VM described with the Virtual Deployment
Unit descriptor.
1..n
VNF VNF Forwarding Graph
1..n
0..n
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Overview of MANO Descriptor Files
Service
 order
 with
 parameters
NSIDs VNFFGID VNFIDs VVLIDs
Service
 Instance

Service
  • Services

NFV
 instances
customized
 from

VNF
 Forwarding
 Graph: catalog
templates
 by

-­‐ E2E
 Service
 Description
 &
 KPIs
NFVO
-­‐ Info
 about
 Component
 VNFD
 ,
  NSD • Each
 service

PNFD,
 and
 associated

 Links O Service
 Chain
  having
  k)
-­‐ Inter
 NF
 KPIs
 with
 dependent
 VNFs
  Record component
  r
/PNFs
 in
 service
 graph
  o
VNFFG r VNFDs,
 service
  w
graph
 definition,

g
and
 real
 time

c n
status
 of
 service
  i
o
graph
g
Virtual
 VNF
 Link
 Descriptor: h n
-­‐ Link
 type
 (egPoint
 to
 Point
 ,
  o
Multipoint)
 ,
 Inter
 VNF,
 &
 VNF
 to
  Link
 Instance
  (
legacy
 network
 links,
 SAN VVLD e Virtual
  • VNLs
  nt
-­‐ KPIs
 (egBandwidth
 ,
 QoS,
 Latency) VNF e
instantiated

-­‐ Network
 type
 (Hypervisor
 vSwitch,

  s Link
  m
in
 NFVI
 by

NIC
 eSwitch,
 Cluster
 VEPA
 or
  Record u
FCoE/IB,
 WAN)
  Element
  t NFVO
 &
 VIM oc
catalog d

r VNF
 Instance
  WI
Virtual
 Network
 Function
 Descriptor: Virtual
  -­‐ VNFs

• Compute
 requirements
 and
 SLAs a Network
  instantiated
  O
• For
 each
 Component
 sub
 functions,
  Function
  by
 NVFO,
  N
(egProcessing,

 memory,
 Storage
  VNFD A
access
 requirements
 &
 SLAs) t Record VNFM
 &
  M
VIM
• Reliability
 SLAs/class
• Intra
 VNF
 component
 links VNF
  o V
F
catalog
N
r PNF
 Instance

Physical
  I
-­‐PNFs
  S
Physical
 Network
 Function
 Descriptor: PNFD Network
  incorporated
  T
• Reliability
 SLAs/class Function
  E
• Legacy
 network

 links Record by
 NVFO
  :
e
… c
r
8 u
o
Resource
 orders
 with
 parameters S
Overview of MANO Descriptor Files
(ongoing work)
•  Network Service descriptor:
–  E2E service description including supported SLA parameter, references to
covered VNF-FG and VNFs, list of supported service monitoring parameters.
•  VNF Forwarding Graph descriptor:
–  VNFFG description, VNFs and VNFDs needed for orchestration, reference to link
information, description of Physical/Logical interfaces
•  VNF Descriptor:
–  Links to scripts for initiation and termination, description of internal and external
connectivity, dependencies between VNFCs.
–  VDU Description:
•  VM specification, required storage and computation resources, initiation and
termination scripts, high avaliability redundancy model, scale_out/in limits.
•  PNF Descriptor:
–  reference to link information, exposed external interfaces, PNF addresses, PNF
status, systems subscribed for notifications
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Overview of MANO Descriptor Files
(ongoing work) (ctd.)
•  Network Service Instance Descriptor:
–  Network service category , network attachment points, scaling
methodology and policy, list of SLA descriptors, and monitoring
parameter.
•  VNF Instance Descriptor:
–  VNF category, information on external connectivity, scaling
methodology and policy, list of SLAs, and the list of monitoring
parameter.

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