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Deeply Programmable Network (DPN) and Advanced Network Virtualization Aki Nakao The University of Tokyo 2012/11/27 1 OpenFlow SDN OpenFlow Controller Fixed Data Plane Fixed Control Plane (OpenFlow API) Flow Pattern Match


  1. Deeply Programmable Network (DPN) and Advanced Network Virtualization Aki Nakao The University of Tokyo 2012/11/27 1

  2. OpenFlow ∈ SDN OpenFlow Controller Fixed Data Plane Fixed Control Plane (OpenFlow API) Flow Pattern Match Actions • Complex packet processing / Non-IP protocols handling • New classification rules based on more than 12 tuples • Proprietary API definition / dynamic reprogramming of APIs • Rapid prototyping of future network node... Physical Ports Although OpenFlow enables flexible control of flows, we want more: OpenFlow Switch 2 ������������������������������������

  3. For some of us, OpenFlow/API is at the right level of abstraction... • We should be able to extend API for complex actions • OpenFlow may be forcedly used in an inefficient manner, e.g., • copying L7 bits to MAC for control based on those bits... • parsing tuples in a non-standard way to implement VXLAN etc. However...for some of us, 3 ������������������������������������

  4. Extending SDN Further? Deeply with external processors Irrelevant with OpenFlow (+processors) Scope of Programmable SDN Network (DPN) Deeper Programmability Out of scope of OpenFlow OpenFlow of OpenFlow • Transcode • Defining new proprietary APIs • Content Centric Network (CCN) • New Layer2 • IPvN (N>6) • DPI Target Scope • Cache • Control-Plane Programmability • Route Control • Access Control • Network Management • Data-Plane Programmability • Packet Data Processing • Handling New Protocols • Meta-Control-Plane Programmability 4 ������������������������������������

  5. VNode Infrastructure Tunnel Network Edge Slicing Point Access VNode Small-Factor Tunnel GRE GRE Tunnel GRE Deep Programmability for Network Edge • Fixed-mobile converged slicing • Deeply programmable, even at L2, yet high performance • “Tangible” small-form-factor (1U) VNode Lightweight Slicing 5 ������������������������������������

  6. DPN as a super set of SDN Programmability for Data Plane Programmability for Control Plane via a given API Programmability for defining an API for C/D planes DPN (Deeply Programmable Network) SDN 6 ������������������������������������

  7. Making fully programmable network nodes? Programmable Node • Enable network virtualization (multiple logical slices) • Instantly upgrade/downgrade switching logics • Achieve both programmability and performance at the same time • Make a slice fully programmable (data-plane, control-plane) Challenges: Controller Programmable Control Plane Programmable Data Plane ����������������������� ����������� ����������� ����������� (network function ��������������� 7 ������������������������������������

  8. FLARE ��� ��� �������������� ����������������� ��������������� ��������������� ������ ������������ ���� �������� ������������� ������������� ���������� 8

  9. FLARE Architecture Central Fully . Virtual Ports Fast Path Slow Path Sliver N Physical Ports FLARE Manager Manager Node Packet Slicer Sliver 1 Sliver 2 Programmable . ������������������������������������ 9

  10. FLARE Switch Implementation (fast path)+x86 processor (slow path) • Mini 1U / 1U / 2U Form Factor (only 200W) • A combination of resource containers on many-core processor • 4x10Gbps (20Gbps Non-blocking), 2x10G+8x1G Planned • Up to 15 slow-path slivers can be instantiated • Linux programmability at slow/fast-path slivers and packet slicer • Parallel programming for high performance at fast-path • OpenFlow switch logic and API can be programmed ������������������������������������ 10

  11. Control Plane Versioning Physical Ports OpenFlow v1.1 Packet Slicer New Logic OpenFlow v1.0 . Virtual Ports Slow Path Fast Path FLARE Switch Change according to flows, time, etc Central FLARE Controller Manager Node Sliver 1 Sliver 2 Sliver N . 12 ������������������������������������

  12. Network Virtualization FLARE Switch FLARE AP FLARE Manager ������������������������������������ 13

  13. Programming Model Multi-Threaded Modular Programming ARP, IPv4, IPv6, IPSec, GRE, NAT, many more...) FromIO (xgbe1) ToIO (xgbe2) FromIO (xgbe2) ToIO (xgbe1) • Ready-made software modules (Ethernet, CRC, fast-path, slow-path and slicer sliver • Arbitrary switch logic(s) can be implemented in e.g., Click Software Modular Router Slow Path NOX ofprotocol dpctl Controller tunnel Fast Path OFSwitch 14 ������������������������������������

  14. Ethernet Switch Switching Performance ������ �������� ������� ������� ����� ������ ������ �������� ������� ������� ������ ��� ��� ��� ��� ��� ��� ��� ��� ���� ��� ��� ��� ��� ��� � ������ ������� ������� ������� ������� ������������� 15 �������������� ������������������������������������

  15. OpenFlow Switch Switching Performance FromIO (xgbe1) ToIO (xgbe2) FromIO (xgbe2) ToIO (xgbe1) Control Plane NOX ofprotocol dpctl Controller tunnel Data Plane OFSwitch ������ ��� ��� ��� ���� ��� ��� ��� ��� ��� ��� ��� ��� ��� ��� � ������ ������� ������� ������� ������� ������������� �������������� 16 ������������������������������������

  16. How deep programmability do we want? Several questions to ask: • Control plane programmability only? • Data plane too (cache, transcode, DPI)? • Can we define a new L2 protocol? 17 ������������������������������������

  17. A Case in Data Center Network Data Center Network depends heavily on L2 leading to solutions such as EUI-64 and VXLAN • Limitation in MAC address space • Conflict of MAC addresses in VM migration • Limitation in VID (802.1Q) space • The number of tenants increases in IaaS 18 ������������������������������������

  18. Mac Address Extension ����������������������������������������� http://en.wikipedia.org/wiki/MAC_address 19 ������������������������������������

  19. Extended MAC Switching Switching Performance ������ �������� ������� ������� ����� ������ �������� ������ ������� ������� ������ ��� ��� ��� ��� ��� ��� ��� ���� ��� ��� ��� ��� ��� ��� � ������ ������� ������� ������� ������� ������������� �������������� ������������������������������������

  20. Extended DMAC Extended MAC1 With Extended MAC Inter-Cloud VM Migration FLARE FLARE Migration WAN Extended MAC2 Extended SMAC Guest VM VM Guest Extended MAC2 VM Guest Extended MAC1 VM Guest IP Datagram Type ����������������� �� ������ ����� ������������������������������������ 21

  21. FLARE at ITPro EXPO 2012 Beyond OpenFlow/SDN 10Gb/s SFP 27 ������������������������������������

  22. (with Cisco & Juniper) MPLS 2012 28 ������������������������������������

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