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This document provides an overview of software-defined networking (SDN) and the HPE VAN SDN Controller. It defines SDN and describes its key concepts including the separation of the control plane and data plane. The benefits of SDN like centralization, dynamism, and optimization are outlined. The architecture of the HPE SDN Controller is presented along with the core applications it provides for network discovery, path selection, topology management and more. In conclusion, SDN is positioned to transform static networks into scalable, programmable platforms.
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- 2. Presented By Fedi Haddar Omarhammami Bilel TrabelsiNour Frikha Becem Abid SOFTWARE DEFINED NETWORK 2
- 3. Big PictureGuess whatthat means
- 4. Many questions • Openflow •Controller • Openstack • Overlays • Network virtualization • Automation • APIs • Application oriented • Virtual Services • Open vSwitch • … SOFTWARE DEFINED NETWORK 4
- 5. This is ourPlan Definition SDN SDN Architecture OpenFlow conception HPE VANBenefits & Need SDN Conclusion
- 6. What’s SDN ?First,you need to learn the basics.
- 7. SOFTWARE DEFINED NETWORK7 What is Software Defined Networking(SDN)? Software defined networking (SDN) is an approach to building computer networks that separates and abstracts elements of these systems Global Network View Protocols Protocols Control via open forwarding interface Network Operating System Control Programs Control Programs Packet forwarding
- 8. SOFTWARE DEFINED NETWORK8 In other words… In the SDN paradigm, not all processing happens inside the same device Control Plane Data Plane The concepts of SDN
- 9. 9SOFTWARE DEFINED NETWORK ProcessingPlane Where it runs How fast these processes run Type of processes performed Control Plane Switch CPU In the order of thousands of packets per second Routing protocols (i.e. OSPF, IS-IS, BGP), Spanning Tree, SYSLOG, AAA (Authentication Authorization Accounting), NDE (Netflow Data Export), CLI (Command Line interface), SNMP Data Plane Dedicated Hardware ASIC’s Millions or Billions of packets per second Layer 2 switching, Layer 3 (IPv4 | IPv6) switching, MPLS forwarding, VRF Forwarding, QOS (Quality of Service) Marking, Classification, Policing, Netflow flow collection, Security Access Control Lists Control Plane and Data Plane Two fundamental terms to begin understanding the concepts around SDN
- 10. SDNHow it works? SOFTWARE DEFINED NETWORK 10
- 11. 11 SOFTWARE DEFINED NETWORK OperatingSystem model Operating System Core services CPU Storage Memory Network APP1 APP2 APPN SDN Model Network Operating System Core services Forwarding device Forwarding device Forwarding device Forwarding device NetApp1 NetApp2 NetAppN Packet Flow Fast Path SDN model VS traditional model network
- 12. 12SOFTWARE DEFINED NETWORK Architectureof SDNHow it look like In the SDN architecture, the control and data planes are decoupled, network intelligence and state centralized, and the underlying network infrastructure is abstracted from the applications.
- 13. 13SOFTWARE DEFINED NETWORK Benefitsof SDNInternet +Inexpensive +Centralization +Dynamic +Optimize +Filter Controller I need QOS Threat detection Data base +Redirect +Load-balancing Checking threats for active connection
- 14. 14SOFTWARE DEFINED NETWORK Openflow Software Defined Networking Openflowis one flavor, or a subset, of SDN Openflow does not equal SDN
- 15. What HPE providefor us? Describe how HPEwork
- 16. 16SOFTWARE DEFINED NETWORK TheHPE VAN SDN Controller provides a unified control point in an OpenFlow-enabled network, simplifying management, provisioning, and orchestration and enabling delivery of a new generation of application-based network services. About the HPE VAN SDN Controller
- 17. 17SOFTWARE DEFINED NETWORK TheHPE SDN ecosystem
- 18. 18SOFTWARE DEFINED NETWORK HPEVAN SDN Controller software stack
- 19. 19SOFTWARE DEFINED NETWORK OpenFlowLink Discovery OpenFlow Node Discovery Path Daemon Path Diagnostics Topology Manager Topology Viewer The HPE VAN SDN Controller includes a default set of core network service applications that are installed as modules on the controller. List of controller embedded applications
- 20. 20SOFTWARE DEFINED NETWORK TheOpenFlow Link Discovery application pushes flow-mods to steal discovery packets, injects discovery packets to all ports on all datapaths, and discovers links on the controlled network by listening for PACKET_IN messages. It discovers two types of links: direct links multi-hop links The OpenFlow Link Discovery The OpenFlow Link Discovery application distinguishes the link type by injecting two packets to each port in an OpenFlow instance. These packets have the same Ethernet type (0x8999), but are sent to different destination MAC addresses
- 21. 21SOFTWARE DEFINED NETWORK TheOpenFlow Node Discovery application pushes flow-mods to controlled devices that copy ARP packets or DHCP packets to the controller for processing and listens for PACKET_IN messages that contain the ARP or DHCP protocol. OpenFlow Node Discovery
- 22. 22SOFTWARE DEFINED NETWORK ThePath Diagnostics application determinates and verify the path taken by trace packets from a source host to a destination host. The application finds an existing flow that matches with description of the trace packet, clones it with higher priority, and adds an additional action toinstruct the selected switch to send this packet back to the controller for status tally. Path Diagnostics
- 23. 23SOFTWARE DEFINED NETWORK ThePath Daemon application is responsible for pushing end-to-end flows for all ARP and IPv4 flow misses that arrive at the controller. By default, Path Daemon is responsible for Layer-2 forwarding only. This component depends on other network service components like the Node manager and the Path Selection manager. Path Daemon
- 24. 24SOFTWARE DEFINED NETWORK TheTopology Manager provides topology information of the control domain. It also facilitates shortest path traversals through the control domain by computing low cost next-hops or link edge weight between any two datapaths in the control domain. Topology Manager creates the clusters and broadcast tree to avoid loops and broadcast storms. Topology Manager
- 25. 25SOFTWARE DEFINED NETWORK CONCLUSIONSand FUTURE SCOPE With its many advantages and astonishing industry momentum, SDN is on the way to become- the new approach for networking. promises to transform today’s static networks into flexible ,scalable, programmable platforms with the intelligence to allocate resources dynamically.
- 26. Thank YouFor YourAttention
Editor's Notes
- #14 the benefits of an SDN could lead to: -the ability to purchase inexpensive switches that have very little resident software and processing needs -Centralization of the forwarding information base allows optimum routes to be calculated deterministically for each flow. end-to-end across the topology -SDN dynamically respond to application requirements -SDN optimize the utilization of the network without sacrificing service quality -SDN can filter packets as they enter the network and hence these switches can act as simple firewalls at the edge of the network -SDN switches can redirect sertain suspicious traffic flows to higher layer security controls .such as IPS systems ,application firewalls and data loss prevention devices. -SDN switches that support the modification of packet headers will also be able to function as a simple cost-effective load-balancing device