Software Defined Networking and Network Virtualization

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1 Software Defined Networking and Network Virtualization Aryan TaheriMonfared October 02, 2013

2 Agenda Motivation 1 Motivation 2 What is OpenFlow? Advantages Disdvantages Stakeholders How? 6 Networking Aryan TaheriMonfared inside a Rack

3 Outline Motivation 1 Motivation 2 What is OpenFlow? Advantages Disdvantages Stakeholders How? 6 Networking Aryan TaheriMonfared inside a Rack

4 Traditional Data Network Functionality implemented in dedicated appliance or ASIC Proprietary appliances/apis Individual configuration Time consuming/error prone configuration Automating tasks by (home-grown) scripts Lack of communication between application & network Slow & costly service innovation

5 Outline Motivation 1 Motivation 2 What is OpenFlow? Advantages Disdvantages Stakeholders How? 6 Networking Aryan TaheriMonfared inside a Rack What is OpenFlow? Advantages Disdvantages

6 Problem? Motivation What is OpenFlow? Advantages Disdvantages Nick McKeown See references.

7 What is OpenFlow? Advantages Disdvantages What is Software Defined Networking? Separating the control plane from the forwarding plane physically. Controlling several forwarding devices with single control plane. Making clear the distributed systems problem. ( Solve the problem once!) Configuring flows from global view.

8 What is OpenFlow? Advantages Disdvantages What is Software Defined Networking? SDN is a mechanism not a solution Provides: more control, better guarantees, NOT necessarily simplicity Can be combined with backup path/other decision-making process Implementations: SANE, Ethane, OpenFlow

9 SDN is based on Abstraction What is OpenFlow? Advantages Disdvantages Forwarding Abstraction: OpenFlow API x86 instruction set State Distribution Abstraction: Single state distribution mechanism, well-known convergence properties, re-usable (new protocol new state distribution mech.) Specification Abstraction: Interacting with network as a single device

10 What is OpenFlow? Motivation What is OpenFlow? Advantages Disdvantages Network Operating Systems convey configuration of global network view to actual physical devices One possible definition of how to model the configuration of a physical device

11 Traditional Switch Motivation What is OpenFlow? Advantages Disdvantages

12 OpenFlow Capable Switch What is OpenFlow? Advantages Disdvantages

13 OpenFlow Capable Switches What is OpenFlow? Advantages Disdvantages

14 Distributed OpenFlow Controller What is OpenFlow? Advantages Disdvantages

15 What is OpenFlow? Advantages Disdvantages Pros: Global view of network demands and fabric resource Makes it easier to control diverse switches Deterministic and dynamic flow placement Efficient provisioning/releasing resources Faster convergence Higher utilization More fault-tolerant

16 What is OpenFlow? Advantages Disdvantages Cons: OpenFlow is in early stages Controllers are not mature yet Upgrading HW/SW is required Flow programming is not simple/fast Northbound APIs in controllers are not standard (Adapting the same application to different controllers)

17 Outline Motivation 1 Motivation 2 What is OpenFlow? Advantages Disdvantages Stakeholders How? 6 Networking Aryan TaheriMonfared inside a Rack

18 What is? Faithful logical reproduction of physical network services. Decoupling the (virtual) network services from the physical network. Coexistence of multiple virtual networks on the same physical substrate. Simplifies administration. It s a solution. SDN can be used for building Virtualized Networks.

19 Outline Motivation 1 Motivation 2 What is OpenFlow? Advantages Disdvantages Stakeholders How? 6 Networking Aryan TaheriMonfared inside a Rack

20 SDN/VN Use-cases Deployment on university campuses WAN optimization Flexible virtualization platform Security services Bandwidth on demand applications Multipath networking for higher utilization and efficiency Network administration Mobility

21 Outline Motivation 1 Motivation 2 What is OpenFlow? Advantages Disdvantages Stakeholders How? 6 Networking Aryan TaheriMonfared inside a Rack Stakeholders How?

22 Stakeholders How? in University Campus Network Diverse use-cases: vending and training machines, fire alarms, monitoring systems, BYOD, mission critical systems, innovation infra. etc. Diverse requirements: secure communication, openness, virtualization, etc. Vertical integration: Network HW, OS, and applications are tightly integrated in a single product Lack of open standard APIs: Inflexible home-grown scripts High costs: WiFi, Videos, Big Data-Large Bandwidth Mismatch between innovation pace in computing and networking

23 Who will benefit from? Stakeholders How? Campus Central IT: Operation efficiency Networking Research Community: Using slices of production network Research Community (with huge datasets): High energy physics, Bioinformatics, etc.

24 How can you benefit from? Stakeholders How? Virtualization: Virtual networks independent of underlying L1/L2/L3 Advanced Forwarding Programmability: Developing other applications on top

25 : Motivation Stakeholders How? Disaster recovery On-demand provisioning/de-provisioning of network slices Multipath TCP (e.g. Large volume data transfer) Compliant virtualized networks (e.g. Payment Card Industry Data Security Standard (PCI DSS) for POS)

26 Outline Motivation 1 Motivation 2 What is OpenFlow? Advantages Disdvantages Stakeholders How? 6 Networking Aryan TaheriMonfared inside a Rack Networking inside a Rack Tenant Network Logical View

27 Multiple Cells Motivation Networking inside a Rack Tenant Network Logical View

28 Single Cell Motivation Networking inside a Rack Tenant Network Logical View

29 Inside a Rack Motivation Networking inside a Rack Tenant Network Logical View

30 Inside a Compute Node Networking inside a Rack Tenant Network Logical View

31 Network Logical View Networking inside a Rack Tenant Network Logical View

32 Networking inside a Rack Tenant Network Logical View Any Networking?

33 Networking inside a Rack Tenant Network Logical View Any Networking? Yes, lots of them :) Deployment complexity Maintenance cost Tenant s network isolation and end-to-end connectivity Tenant s traffic monitoring Security enforcement

34 Networking inside a Rack Tenant Network Logical View Any Networking? Yes, lots of them :) Deployment complexity Maintenance cost Tenant s network isolation and end-to-end connectivity Tenant s traffic monitoring Security enforcement

35 Networking inside a Rack Tenant Network Logical View OpenFlow Enabled Cloud Infrastructure

36 Cloud Infrastructure Monitoring 1 Networking inside a Rack Tenant Network Logical View

37 Cloud Infrastructure Monitoring 2 Networking inside a Rack Tenant Network Logical View

38 Networking inside a Rack Tenant Network Logical View Cloud Infrastructure Quarantine Zone

39 References Motivation Networking inside a Rack Tenant Network Logical View An attempt to motivate and clarify Software-Defined Networking (SDN) A Case for Expanding OpenFlow/SDN DeploymentsOn University Campuses

40 Q?A! Motivation Networking inside a Rack Tenant Network Logical View Thank you!

41 Networking inside a Rack Tenant Network Logical View Deployment complexity and Maintenance cost Increased number of networking devices by the factor of cluster size Virtualized networking devices

42 Networking inside a Rack Tenant Network Logical View Tenant s traffic isolation and end-to-end connectivity VLAN tagging GRE tunnels, EoIP tunnels Namespaces in Linux networking stack

43 Networking inside a Rack Tenant Network Logical View Tenant s network monitoring How to distinguish between tenants traffic? VLAN IDs? GRE addresses? Namespaces? How to get the information in real-time? Querying: network management service? platform controller? each compute node?

44 Networking inside a Rack Tenant Network Logical View Tenant s network monitoring How to distinguish between tenants traffic? VLAN IDs? GRE addresses? Namespaces? How to get the information in real-time? Querying: network management service? platform controller? each compute node?

45 Networking inside a Rack Tenant Network Logical View Tenant s network monitoring How to distinguish between tenants traffic? VLAN IDs? GRE addresses? Namespaces? How to get the information in real-time? Querying: network management service? platform controller? each compute node?

46 Networking inside a Rack Tenant Network Logical View Tenant s network monitoring How to distinguish between tenants traffic? VLAN IDs? GRE addresses? Namespaces? How to get the information in real-time? Querying: network management service? platform controller? each compute node?

47 Networking inside a Rack Tenant Network Logical View Security enforcement Where to put security middle boxes? How to control and federate them with the rest of platform s components?

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