ETSI NFV Management and
Orchestration -
An Overview
Mehmet Ersue
ETSI NFV MANO WG Co-chair
(mehmet.ersue@nsn.com)
IETF #88, Vancouver, Canada
Virtualization as a Paradigm
Virtual Network Functions (VNF)
Virtual Virtual Virtual Virtual
Machine Machine Machine Machine Examples of VNFs:
Guest Guest Guest Guest
Virtualiz
ation
• Switching: BNG, CG-NAT, routers.
OS OS OS OS
and • Mobile network nodes: HLR/HSS,
Applicati
on MME, SGSN, GGSN/PDN-GW, RNC.
Manage
Guest
Applic
ation
Guest
Applic
ation
Guest
Applic
ation
Guest
Applic
ation ment • Home routers and set top boxes.
• Tunnelling gateway elements.
• Traffic analysis: DPI.
• Signalling: SBCs, IMS.
IaaS • Network-wide functions: AAA servers,
Cloud
policy control.
NaaS Hypervisor
VNF NF
API
• Application-level optimisation: CDNs,
VNC
Host OS Load Balancers.
NC NF VN VN VN Cloud
Stack, • Security functions: Firewalls, intrusion
Hardware Open
Stack
detection systems.
NF: Network Function
VNF: Virtual Network Function
NC: Network Controller
VN: Virtual Network
2
Network Function Virtualization
Components E2E Network Service
End End
Point Network Service Point
Logical VNF Forwarding
Abstractions
VNF VNF
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 Resources Virtual Virtual Virtual
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-
2A 2B
VNF-1 PNF-3 End
End VNF- Point
Point 2C
Virtualisation Layer
Hardware
Legend Resources
in Physical
NFVI-PoP Locations
Physical link
Logical link
Virtualisation
4
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
Nf-Vi Infrastructure
NFVI Manager
(VIM)
NFV-MANO
Execution reference points Other reference points Main NFV reference points
5 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
NFV
instances
• Services
customized
from
VNF
Forwarding
Graph: catalog templates
by
-‐ E2E
Service
Description
&
KPIs NFVO
-‐ Info
about
Component
VNFD
,
PNFD,
and
associated
Links
NSD Service
Chain
• Each
service
O
Source: ETSI NFV MANO WI document (ongoing work)
having
-‐ Inter
NF
KPIs
with
dependent
VNFs
Record component
/PNFs
in
service
graph
VNFDs,
service
VNFFG r graph
definition,
and
real
time
c status
of
service
graph
Virtual
VNF
Link
Descriptor:
-‐ Link
type
(eg Point
to
Point
,
h
Multipoint)
,
Inter
VNF,
&
VNF
to
Link
Instance
legacy
network
links,
SAN
VVLD e Virtual
• VNLs
-‐ KPIs
(eg Bandwidth
,
QoS ,
Latency) VNF instantiated
-‐ Network
type
(Hypervisor
vSwitch,
NIC
eSwitch,
Cluster
VEPA
or
s Link
Record
in
NFVI
by
FCoE/IB,
WAN)
NFVO
&
VIM
Element
catalog
t
Virtual
Network
Function
Descriptor:
r VNF
Instance
-‐ VNFs
Virtual
• Compute
requirements
and
SLAs
• For
each
Component
sub
functions,
a Network
instantiated
by
NVFO,
Function
(eg Processing,
memory,
Storage
access
requirements
&
SLAs)
VNFD t Record VNFM
&
• Reliability
SLAs/class VIM
VNF
• Intra
VNF
component
links
catalog
o
r Physical
PNF
Instance
-‐ PNFs
Physical
Network
Function
Descriptor: Network
• Reliability
SLAs/class PNFD Function
incorporated
• Legacy
network
links Record by
NVFO
…
8
Resource
orders
with
parameters
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
8
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.
9
VNF DESCRIPTOR MODEL (ongoing work)
10 11
Current Development in NFV MANO WG
• NFV MANO WG recently developed:
– Network Service and VNF lifecyle management message flows:
• including onboarding, instantiation, scaling and termination,
• yet to do: VNF Forwarding Graph lifecyle management
– Information elements for the entities VNF, VNFFG, NS and their
instances,
• Current focus is on NFV operational management:
– Fault and event management
– planned: capacity planning, migration, etc.
• Provide gap analysis and recommendations to SDOs as well as
open source organizations,
– Collaboration for further development in selected organizations
planned based on a cooperation on working group level.
GS:
Group
Specifica.on
Timeline for ETSI NFV Work Programme
MANO WI MANO WI
Early Stable
Draft Draft
11
Source: ETSI NFV White Paper 2
References
• Published E2E Arch, REQ, Use Case, Terminology documents in
ETSI NFV Open Area:
– http://docbox.etsi.org/ISG/NFV/Open/Published/
• Published ETSI NFV white paper:
– http://portal.etsi.org/NFV/NFV_White_Paper.pdf
– http://portal.etsi.org/NFV/NFV_White_Paper2.pdf
• ETSI member area:
– Current NFV MANO WG WI document: DGS/NFV-MAN001 (ongoing
work)
• http://docbox.etsi.org/ISG/NFV/MAN/70-DRAFT/MAN1/NFV-MAN001v0011.zip
– ETSI NFV ISG portal:
• http://portal.etsi.org/portal/server.pt/community/NFV/367?tbId=789
– NFV MANO WG on ETSI portal:
• http://portal.etsi.org/portal/server.pt/community/NFV/367?tbId=796
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