5. •네트워크변경은어렵고, 위험하고, 느림
•트래픽의증가에대한대처가느림
•새로운서비스를추가하기위해서는비싼새로운기술추가
•막대한돈소요
계층적구조
일반적인네트워크구조
단일구조
폐쇄적
유연하지않음
Problem of Present Network Architecture
상하
트래픽중심설계
6. Heavy Increases of Network Traffic
Visual Networking Index Forecast, 2012-2017
Busy vsAverage Internet Traffic Growth
per Month of IP Traffic in 2017
네트워크트래픽증가
네트워크장비비용증가
7. Alternative ?
1. H/W 와S/W 분리
2. H/W 는x86
3. Software networking
4. Virtual Networking
네트워크장비비용을줄이자!!
8. Decoupling Hardware From Software
Custom Network OS
Custom ASIC HW
Standard Server
Network OS
Reduce $
Reduce $$
9. Software Virtual Network
유연성과확장성증대
소유/운영비용절감
필요에따른손쉬운Scale up / Down
프로그래밍으로네트워크추가/삭제/변경/업그레이드
Scale Up
& Down
Users
Speed
X86 H/W발전에따른성능강화
손쉬운운영과장애처리
VM 으로동작( 자원이동용이)
자동화(부하조절)
11. SDN ?
“ Software Defined Networking(SDN) is an emerging network architecture where network control is decoupled from forwarding and is directly programmable.. “
SDN의정의
Control 과Data Plane 분리
API 지원
x86
네트웍기능가상화
프로그램으로제어
SDN 의특징
12. •Configuration Interfaces
•CLI, GUI, REST API
•Policies
•RoutingFW/ NAT
•PolicyQoS
•VPN TerminationNetwork
•BridgingInterface Drivers
Separating Control From Data Planes
13. NFV ?
“Network design must be more agile and able to respond on-demand to the dynamic needs of the traffic and services running over it, Key enabling technologies for this include SDN (Software Defined Networking) and NFV (Network Functions Virtualization)“
NFV의정의
European Telecommunications Standards Institute
14. NFV & SDN
(Network Functions Virtualization)
NFV
SDN
(Software Defined Network)
네트워크장비에서H/W, S/W 분리
범용서버의가상화기반
네트워크기능가상화제공
Data 와Control Plane
프로그램으로제어
네트워크장비에서H/W, S/W 분리
Protocol
15. Difference between SDNandNFV
Software
Custom HardwarePurpose-built dedicateddevice
정형화된x86 서버의가상화환경내에다양하며융합적인네트워크장비를사용가능하게하는기술.
(firewall, switching, routing, ADC, BRAS, EPC, etc. )
능동, 신속성증대그리고투자비감소
NFV
SDN
Software Software
Hypervisor
x86 HardwareIndustry-standardserver
기존의Control-plane과Data-plane을분리하여지능적이며프로그래밍가능한Controller에서Control-plane을관장하는기술.
SDN Controller
Control plane
프로그래밍에따른혁신및자동화
16. NFV & SDN
Application, Policy
Network OS
Hardware Abstraction Layer
Hardware
(OF Switch)
SDN
Vyatta
Physical servers VMs
Orchestration
35. New Network Architecture
Vendor A
Vendor B
Vendor C
Open Source
SDN
Controller
Northbound API
Industry Standard
Control Protocols
Standard
Modeling
Language
CLI/API
EMS/NMS
Vendor A
CLI/API
EMS/NMS
Vendor B
Vendor C
CLI/API
EMS/NMS
Vendor
Specific
Management
Captive
Control
Plane
Industry
Standard
Protocols
36. H/W to Orchestration
Connection Services
Structural Services
Functional Orchestration
SERVICES
CONTROL
ORCHESTRATION
REST
Neutron
DNRM
Congress
Hydrogen
Helium
vADX
Service
Chains
ARB
Virtual
HARDWARE
Distributed
NETCONF/YANG,
OpenFlow
vVPN
vFW
…….
VYATTA
Services Layer
vRouter