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NFV/SDN: Managing and implementing Network Function Virtualization with intelligent OSS
By Michiel NuytemansOSS Consultant, Comarch
Comarch Telco Brunch, Brussels, Friday October 23rd
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Copyright Comarch 2015
NFV SDN evolution 1/3: No virtualization in the network
Data Center
EPC
PDN
eNodeB
eNodeB
RAN
eNodeB
App App
SGW PGW
App
VIP
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NFV SDN evolution 2/3: Virtualization in the network - NFV
Data Center
EPC
PDN
eNodeB
eNodeB
RAN
eNodeB
AppvPGWvSGW
BBUBBU
vBBU
App AppPGWSGW SGW PGW
eNodeB
VIP
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NFV SDN evolution 3/3: Network nodes as micro-data centers
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NFV - BSS/OSS
OSS – traditional role
Real-time OSS -
part of NVFIOSS for
SDN
ETSI Ref Arch - Comarch OSS
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SDN – BSS/OSS
SDN architecture – vision
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Gi-LAN vs. Mobile Edge Computing based services
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Gi-LAN Services
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Mobile Edge Computing
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Gi-LAN vs. MEC
EPCGi-LAN
eNodeB
RAN
eNodeB
vPGWvSGW
SGWBBUBBU
vBBU
PGW PGWSGWDPI SGW PGW
Video Optimizer
DPI DNS
DPI DPI
App...
Video Optimizer
Video Optimizer
DNS DNS
eNodeB
eNodeB
Not virtulized RAN
eNodeB
eNodeB
Not virtulized RAN
Backhaul aggregation
SGW PGW DPI Video Optimizer DNS
VIP
VIP
Video Optimizer DNS App App
VIP
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Network as distributed Cloud: Gi-LAN vs. MEC
Benefits• Services are deployed „in the network” not on MEC or in Gi-LAN
• Dynamic, policy-driven decision to allocate resources either at:
• Edge, close-edge, core, (Gi-LAN)
• Dynamic MEC Service capabilities creation – no „hardcoding”
• MEC capabilities creation is to be perceived as NFV functions instantiation at the edge
• Ability to de-allocate MEC from overloaded „edge”
• Offloading „edge” for applications less sensitive for „network latency”
• „Edge” can be dynamically re-allocated to „aggregation” (close edge)
• These dynamic decision are taken based on „virtualized” real-time OSS
Better customer experience at lower costs
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VPN-based services for enterprise customers.Service chaining, orchestration
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VPN example – traditional implementation
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How to implement services?
NFV-centric approach: Firewall example
• Firewall as VNF hosted by NFVI
• SDN forwards packets to/from Internet via port with an accessible vFirewall
• The ‚main’ functionality is implemented in vFirewall
SDN approach: CPE Router example
• vCPE implementation split into:
Control plane: vCPE_CP SDN controller applications
• Manages Flow entries of OFP Switches leveraging Network Topology from OSS Network Inventory
Data Plane – flow entries at OFP Switch at customer premises – move closer to the customer
• Simple packet forwarding based on packet header
• Controlled by vCPE_CP
• The ‚main’ functionality is implemented by controller applications affecting the traffic flow
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VPN – based on SDN and NFV
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VPN – access to business applications and Internet
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VPN – implementation details
CPE:Control Plane – SDN
controller applications
Firewall as VNF on NFVI
CPE:Data Plane – Flow
entries in OFP Switch
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VPN – catalog-driven fulfillment class Domain Objects
«CFS»
VPN
«CFS»
SiteManagedLAN
- IPSubnetwork :int
«CFS»
SiteAccess
- bandwidth
«CFS»
BusinessApplications
- IPAddress
- MAC
«CFS»
Host
- MAC
- IPAddress
«CFS»
InternetAccess «CFS»
Firewall
RFS Firewall
«R»
v Firewall
«R»
VM
«RFS»
SiteAccessFlow
«R»
CPE_OFPSwitch
«R»
PE_OFPSwitch«R»
OFPSwitchFlowEntries
«R»
OFPSwitch_FlowEntries
«RFS»
InternetAccessFlow
«R»
InternetGateway
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VPN – access to business applications and Internet
1. Enterprise Customer, issue and order for an extra
Business Application at Site2
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VPN – Fulfillment example
2. The customer order updates data in Network and Service
Inventory
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VPN – Fulfillment example
3. Network is „reprogrammed” based on data -> Data flows are
updateda
3
3
3
3 3
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VPN – Service Assurance example
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VPN – Service Assurance example
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SDN / NFV
QUIZ
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1. What is a driver for Mobile Edge Computing?
a) There is a need for low-latency, high-bandwidth applications
b) It is cheaper to deploy applications in the edge then in a datacenter
c) There is a need for decentralizing the computing to provide high-availability applications
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2. What is Openflow?
a) An algorithm to perform network routing optimization
b) A platform architecture designed to manage an SDN network
c) A standardized protocol used to configure SDN routers
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3. What is the role of OSS systems in SDN / NFV environment
a) An SDN / NFV environment does not need OSS functions
b) OSS systems need to support legacy infrastructure and network
c) OSS systems can be used to manage both the physical and virtual network resources
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Thank [email protected]