Network Functions Virtualization (NFV) & Software Defined-WAN
Transcript of Network Functions Virtualization (NFV) & Software Defined-WAN
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Network Functions Virtualization
(NFV) & Software Defined-WAN
New trends in IT
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Virtualization & Software Defined Network
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AT&T keynote at Open Network Summit
“By 2020, we plan to virtualize and control over 75 percent of our network using this new software-defined architecture to meet the growing demands of data and video-hungry users.”
John Donovan , CEO – AT&T Communications
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Network Demand
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Traditional Network Device
Specialized Packet Forwarding Hardware
OperatingSystem
App App App……
• closed & complex vendor specific architecture• expensive network operation
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Router Architecture
Adjacent Router Router
Management plane
Configuration / CLI / GUI
Control plane
OSPF
Neighbor table
Link state database
IP routing table
Forwarding tableData planeData plane
Control plane
OSPF
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Software Defined Network (SDN) concepts
Fast Switches
Smart Controller
API
Control Plane
Data Plane
• Open
• Simple
• Scalable
• Secure
• Agile
• More Reliable
• Flexible
• Cost effective
Application Application
Application Plane
API
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transform closed architecture …
Specialized Packet Forwarding Hardware
OperatingSystem
App App App...........
• independent, distributed systems and applications
network operators
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… into SDN
Network OS
Network OSControl Layer
Infrastructure Layer
APIs
Open protocol
Application LayerBusiness APPBusiness APPBusiness APP
Open interface
Pkt. ForwardingHW
“whitebox switch”
network users
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OpenFlow
Open Flow Controller
OpenFlow
Flow Table
“whitebox switch”
Data Frame
port Ethernet IP transport
1. forward frame to port2. send to controller3. process4. drop
counters
Flow Table Entry
rule action stats
FT
OF
FT
OF
Flow Table entries
State Info
FT
OFX
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Network Functions
Router WAN Accelerator Firewall
Switch CDNSession Border Controller
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Network Functions
vendors HW functions
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Virtualization concepts
HW vs. SW virtualization in commodity HW cloud vs. premise based
SW
HW
x86 server
SW
VM
SWSW
VM VM
AT&T Integrated cloudAIC
AT&T FlexWare device
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NFV - Network Functions Virtualization
download App from App store download VNF from Catalogue on Demand
FlexWareSmartphone
AIC
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NFV at AT&T
vendors commodity HW AT&T Services
AT&T NoDvRoutervFWvWANXvWLCvHNFvDNSv…..
AT&T FlexWare
AT&T FlexWaredevice
AT&T Integrated Cloud
SW
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Customer Premises
Transformation to NFV
AT&T Integrated CloudFlexWare device
Router LAN FW WANX
No
n-v
irtu
aliz
ed
Vir
tua
lize
d
DNS
hosting
Data Center
security
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AT&T FlexWare device
Presentation title here—edit on Slide MasterAT&T FlexWare device architecture
vRouter
Customer Software Layer
Linux/ KVM/Orchestration APIs
Software Switch
PnP Client
Platform Software Layer
DDR
ChipSetEx (c602) SSD
L2/L2 HW Switch ( Merchant Silicon
e.g. Broadcom)
SATA
X86 CPU
GigE Chipset (SR-IOV)
8x 1GE LAN Ports
2 Fiber/Copper WAN Ports
2x USB PortsLTE
Hardware Layer
VNF2 VNFX
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Guest LAN/ DMZ
vRouter vFW
L2-vswitch
Internet
MPLS
WAN1
WAN2
WA
N1
WA
N2
LAN
_INTERNET_ IVI IVI
VPN Name
WA
N2
WA
N1
FlexWare Device
INTERNAL LANINTERNAL WAN
LAN
LAN
1
LAN
2
LAN
3
LAN
4
LAN
5
LAN
6
LAN
7
LAN
8
VPN LAN Conn. FW LAN Conn.
PassThrough Conn.
VLANID
VLA
NID
VLA
NID
untrustedLAN
PREMISESROUTER
IVI IVI
privateLAN
vWANx
Service Chaining (inside AT&T FlexWare device)
Presentation title here—edit on Slide MasterYANG + NetConf (configuration of NFV)
Device Configurations
Service Models
Network ModelsLogical Network Model
ServiceModelInstance
APIs
Config
Yang
Netconf
ApplicationLayer
InfrastructureLayer
ControlLayer
• YANG - abstraction between customer function and network implementation.
• NETCONF is a standard device configurations protocolControl plane remains in forwarding layer, accommodates distributed networks
ServiceModelInstance
ServiceModelInstance
Device Model
Instance
Device Model
Instance
Device Model
Instance
Device Model
Instance
Device Model
Instance
ServiceModel
Instance
ServiceModel
Instance
ServiceModel
Instance
ServiceModel
Instance
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AT&T ECOMP – Network OS
ECOMP
Enhanced Control, Orchestration, Management & Policy
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ECOMP (ONAP)
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… is a specific application of software-defined networking (SDN) technology applied to WAN connections, which are used to connect enterprise networks – including branch offices and data centers –over large geographic distances
SD-WAN (Software Defined WAN)
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DMPO – Dynamic Multipath Optimization• automatic link monitoring, autodetection of provider and auto-configuration of link characteristics, routing and
QOS settings• Ondemand, Per-packet link steering based on the measured performance metric, intelligent application learning,
business priority of the application, and link cost• Delivers sub-second protection to improve application availability• Remediates link degradation through forward error correction, activating jitter buffering and synthetic packet
production.
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Internet-based SD-WAN
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SD-WAN over FlexWare
Virtual Gatewayrunning on AT&T AIC
VeloCloud Orchestratorrunning on AT&T AIC
Virtual Edge running on AT&T FlexWare device
Virtual Gatewayrunning on AT&T AIC
Virtual Edge running on AT&T FlexWare device
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SD-WAN orchestrator
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