Download - [SoftCon]SDN/IoT 그리고 Testbed
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About me
•한상윤(Sangyun Han)
•경희대학교 컴퓨터공학과 Mobile Convergence Lab
•삼성 소프트웨어 멤버십 23-1기
•연구 및 관심 분야 : CCN, SDN/NFV, 5G Networking
Mobile Convergence Laboratory
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Mobile Convergence Laboratory
출처 : http://www.itdaily.kr/news/articleView.html?idxno=72063
국내 SDN 시장 전망
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Internet: The Beginning
• 1941년 진주만 공습• ENIAC
• 1960년대 미소 냉전시대• 핵전쟁 대비
• 안정적인 통신시스템 필요
Mobile Convergence Laboratory
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Internet: The Beginning
Mobile Convergence Laboratory
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Internet: The Beginning
•컴퓨터 네트워크
•패킷 교환망(Packet Switching)
• UC버클리, 스탠포드 등대학과 연구소에서 개발 착수
•이후 TCP/IP 개발
Mobile Convergence Laboratory
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Mobile Convergence Laboratory
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L1-L3 Forwarding
Mobile Convergence Laboratory
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L1-L3 Forwarding
Mobile Convergence Laboratory
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L1-L3 Forwarding
Mobile Convergence Laboratory
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출처 : http://bradhedlund.s3.amazonaws.com/2011/openflow-scale/switch-control-data-planes.pngMobile Convergence Laboratory
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출처 : http://bradhedlund.s3.amazonaws.com/2011/openflow-scale/switch-control-data-planes.pngMobile Convergence Laboratory
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[Brain/Control Plane]행동을 위한 계산과 판단
(패킷 경로 설정, 제어 기능)
[Body/Data Plane]실제적인 행동
(패킷 송수신/Forwarding)
Mobile Convergence Laboratory
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Mobile Convergence Laboratory
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•정적인 네트워크 구조
•네트워크의 복잡성
•분산된 장치에 대한 재설정이 어려움
•폭발적으로 증가하는 기기의 수를 커버하기 어려움(IoT)
Mobile Convergence Laboratory
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Mobile Convergence Laboratory
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•네트워크를 소프트웨어와 같이 프로그램화하여 중앙에서 제어
• For Programmable Network
•유동적으로 서비스 상황에 따라 변화하기 용이한 네트워크
Mobile Convergence Laboratory
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출처 : Mauricio Tsugawa Tutorial on Software Defined NetworkingMobile Convergence Laboratory
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출처 : Mauricio Tsugawa Tutorial on Software Defined NetworkingMobile Convergence Laboratory
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출처 : https://www.sdxcentral.com/wp-content/uploads/2015/03/sdn-architecture.pngMobile Convergence Laboratory
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출처 :https://en.wikipedia.org/wiki/University_of_California,_Berkeleyhttps://en.wikipedia.org/wiki/Stanford_University
Mobile Convergence Laboratory
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• Open Interface(API)
• SDN Controller와 OF스위치가 통신하기 위한 프로토콜
•중앙집중식 컨트롤러가 네트워크 장비를 제어 가능
Mobile Convergence Laboratory
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Traditional Switch
Mobile Convergence Laboratory
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Mobile Convergence Laboratory
Control PlaneController
Data PlaneNetwork Element(Switch)
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SDN Controller
Mobile Convergence Laboratory
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SDN Controller
Mobile Convergence Laboratory
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SDN Controller
A BMobile Convergence Laboratory
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SDN Controller
A BMobile Convergence Laboratory
Flow Table에 패킷에 대한 정보를 가지고 있는지 확인
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SDN Controller
A BMobile Convergence Laboratory
모르는 패킷이 도착했어요!어떻게 해야되요?
[packet_in]
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SDN Controller
A BMobile Convergence Laboratory
특정 App의 policyController 내부 규약
기준으로 판단[Computing]
Controller도 모르면?그냥 Packet Drop
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SDN Controller
A BMobile Convergence Laboratory
각 스위치에 포워딩 정책 설정[packet_out/flow_mod]
각 스위치의 Forwarding Table 수정
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SDN Controller
A BMobile Convergence Laboratory
수정된 정책에 따라 패킷 전송
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Mobile Convergence Laboratory
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Mobile Convergence Laboratory
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Mobile Convergence Laboratory
SDN Controller
firewall
평상시엔 주소 변환 기능만 수행 (NAT/PAT)
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Mobile Convergence Laboratory
SDN Controller
firewall
보안 문제발생
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Mobile Convergence Laboratory
SDN Controller
firewall
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Pi Stack SwitchRaspberry Pi를 이용한 SDN 테스트베드 개발
Mobile Convergence Laboratory
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Raspberry Pi
•영국의 라즈베리파이 재단이 만든 교육용 싱글 보드 컴퓨터
• Single Board Computer
•대략 US$ 35
• Pi A/B, Pi B+, Pi2 출시
Mobile Convergence Laboratory
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Raspberry Pi2의 스펙
• Single Board Computer(Micro Computer)
• CPU : 900MHz ARM Cortex-A7 쿼드코어
• RAM : 1GB
• USB 2.0 * 4 + HDMI * 1 + Micro USB전원
• 10/100 Mbit/s Ethernet
출처 : Wikipedia(wikipedia.org/wiki/Raspberry_Pi) Mobile Convergence Laboratory
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Pi Stack Switch HW구성
Mobile Convergence Laboratory
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Pi Stack Switch HW구성
메인 스위치 x 1개 x 1포트+
서브 스위치 x 3개 x 3포트= 10포트 스위치
Mobile Convergence Laboratory
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Pi Stack Switch 완성
Mobile Convergence Laboratory
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Software
Mobile Convergence Laboratory
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SystemArchitecture
Main-Switch
Sub-Switch
Mobile Convergence Laboratory
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Pi Stack Switch - Install
• OpenvSwitch 설치
$ sudo apt-get install openvswitch-switch openvswitch-controller openvswitch-common
$ sudo ovs-vsctl add-br <BridgeName>
$ sudo ovs-vsctl add-port <BridgeName> eth_n
$ sudo ovs-vsctl set-controller <BridgeName> tcp:Ctrl_IP:6633
https://github.com/MobileConvergenceLab/pi-switch
Mobile Convergence Laboratory
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출처 : https://www.sdxcentral.com/wp-content/uploads/2015/03/sdn-architecture.pngMobile Convergence Laboratory
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출처 : https://www.sdxcentral.com/wp-content/uploads/2015/03/sdn-architecture.pngMobile Convergence Laboratory
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Pi Stack Switch와 Controller 연결
메인 스위치
서브 스위치1
서브 스위치2
서브 스위치3
Mobile Convergence Laboratory
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IoT와 테스트베드Raspberry Pi로 AP 만들기
Mobile Convergence Laboratory
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Mobile Convergence Laboratory
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Mobile Convergence Laboratory
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Mobile Convergence Laboratory
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Mobile Convergence Laboratory
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Mobile Convergence Laboratory
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Mobile Convergence Laboratory
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Mobile Convergence Laboratory
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Mobile Convergence Laboratory
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Mobile Convergence Laboratory
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Pi based WiFi APRaspberry Pi를 이용한 IoT 테스트베드 개발
Mobile Convergence Laboratory
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OpenWrt와 Raspberry Pi2로 AP 만들기
• OpenWrt• 무선랜 라우터를 위한 오픈소스 OS• 라우터에 리눅스의 기능들을 패키지 형태로 제공• DHCP, 방화벽, 무선 보안 기능 등
• 준비물• Raspberry Pi2• WiFi USB 동글• OpenWrt 이미지와 SD 카드
• https://github.com/MobileConvergenceLab/pi-wifiap
Mobile Convergence Laboratory
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Mobile Convergence Laboratory출처: http://www.ziksir.com/ziksir/view/1147
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Q&A
Mobile Convergence Laboratory