Dematerializing ICT networks. Prof. Filip De Turck March 25, 2015

Transcription

1 Dematerializing ICT networks Prof. Filip De Turck March 25, 2015

2 Dematerialization?

3 Dematerialization = Softwarization!

4 FLAMINGO Established new conference Bridging Networking with IT London, UK April 13-17, 2015 ICT-FP

5 Softwarization enabled by three paradigms: 1. Network Virtualisation (NV) 2. Software defined Networking (SDN) 3. Network Function Virtualisation (NFV)

6 What is network virtualisation?

7 SP 2 SP 1 InP 2 InP 1

8 SP 2 SP 1 InP 2 InP 1

9 Characterisation of VNE heuristics: VN 3 VN 1 VN 2 VN3 VN 2 Static VN 1 vs. Dynamic t0 Time VN 1 VN 2 VN 3 Virtual Network Embedding (VNE) t0 t1 t2 Time Centralised vs. Distributed VNE Heuristic Instance VNE Inst. VNE Inst. VNE Inst. Concise vs. Redundant

10 Advantages of network virtualisation: Deploy and operate multiple network architectures and protocol stacks simultaneously on the same physical hardware Virtualisation abstractions allow network operators to manage and modify networks in a more flexible, dynamic, and time-efficient way Provide Quality of Service guarantees, such as bandwidth or delay, by intelligently embedding and provisioning virtual resources Sources: Fischer, A.; Botero, J.F.; Till Beck, M.; de Meer, H.; Hesselbach, X., "Virtual Network Embedding: A Survey," IEEE Communications Surveys & Tutorials, vol.15, no.4, pp , 2013 Chowdhury, N.M.M.K.; Boutaba, R., "Network virtualization: state of the art and research challenges," IEEE Communications Magazine, vol.47, no.7, pp.20 26, 2009

11 What is software defined networking?

12 Software Defined Networking (SDN) Separates network control from the forwarding plane Controller (one or more) Feature Feature Network OS Simple Packet Forwarding Hardware Simple Packet Forwarding Hardware Simple Packet Forwarding Hardware Simple Packet Forwarding Hardware Simple Packet Forwarding Hardware 12

13 What is network function virtualisation?

14 cloud computing datacenter 1 enterprise datacenter n

15 cloud computing datacenter 1 enterprise enterprise enterprise enterprise datacenter n

16 use case: residential equipment Home gateway (HGW): - DHCP server - NAT router - Firewall - QoE monitoring home Set top box (STB): - Decoder - Storage - Middleware - Streaming client = network functions

17 use case: virtualisation of residential equipment home datacenter 1 datacenter n

18 virtualisation of network equipment home home home home Firewalls Message routers QoE monitors Broadband remote access servers Session border controllers Etc. telecom network datacenter 1 datacenter n

19 for Network Operator: Advantages Replace dedicated hardware with generic hardware and software-based functions Maximize resource utilization and optimize energy usage Faster and easier deployment, configuration, and updating of network functions Support for the Network-as-a-Service business model for Service Provider: Dynamically scale network, computing and storage resources based on service requirements Reduced time to market for services

20 Challenges 1. Efficient resource allocation for huge amounts of virtualized network functions, organized in Service Function Chains (SFCs) 2. Algorithms for diagnosis and correlation of events in NFV-based systems and troubleshooting 3. Algorithms for proactive resilience and availability of virtualized software-defined systems

21 FLAMINGO Position Paper ICT-FP

22 FLAMINGO Bridging Networking with IT London, UK April 13-17, 2015 ICT-FP

23 Netsoft Workshops IEEE Workshop on Management Issues in SDN, SDI and NFV IEEE International Workshop on Software Defined 5G Networks IEEE Workshop on Security Issues in SDN

24 Special issue on Efficient Management of SDN/NFV-based systems Acceptance ratio: 15% Topics: Efficient resource allocation and management of softwarized network functions, Design of high-performance platforms to allow network function virtualization on commodity machines, Enabling efficient collaboration between providers in softwarized networks.

25 Filip De Turck