Introduc)on to SDN and NFV. Tomás Lynch Solu/on Architect III Ericsson
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1 Introduc)on to SDN and NFV Tomás Lynch Solu/on Architect III Ericsson
2 SoBware- Defined Networking THE PATH TO SDN Introduc)on to SDN & NFV Ericsson AB Page 2
3 IP Router Evolu)on In the beginning Császár, András et al., Converging the Evolu)on of Router Architectures and IP Networks, Introduc)on to SDN & NFV Ericsson AB Page 3
4 IP Router Planes Evolu)on Routers have three well- iden)fied planes Forwarding Control Management Architectural development had taken place almost exclusively for the data plane, Control plane had remained virtually the same. Introduc)on to SDN & NFV Ericsson AB Page 4
5 IP Router Evolu)on Plane Separa)on Control Plane (RIB, LIB) Forwarding Plane (FIB, LFIB) Management Plane (SSH, SNMP) Router Introduc)on to SDN & NFV Ericsson AB Page 5
6 IP/MPLS Backbone Example Router1 Router3 Control Plane (RIB, LIB) Forwarding Plane (FIB, LFIB) Management Plane Control Plane (RIB, LIB) Forwarding Plane (FIB, LFIB) Management Plane Internet Control Plane (RIB, LIB) Forwarding Plane (FIB, LFIB) Management Plane Control Plane (RIB, LIB) Forwarding Plane (FIB, LFIB) Management Plane Router2 Router4 Introduc)on to SDN & NFV Ericsson AB Page 6
7 So far, so good. But Moore s law =~ processing doubles every 24 months Nielsen's Law =~ bandwidth doubles every 12 months Teenager Law =~ the App I was using last week is soooooo boring, I need a new phone every month Introduc)on to SDN & NFV Ericsson AB Page 7
8 New Network Requirements Efficiency Simplify network & opera)ons Speed Fast deployment of new services Innova)on Implement new business models Introduc)on to SDN & NFV Ericsson AB Page 8
9 Efficiency Physically Decoupling Control Plane Control Plane (RIB, LIB) Router1 Router3 Control Plane (RIB, LIB) Forwarding Plane (FIB, LFIB) Management Plane Control Plane (RIB, LIB) Forwarding Plane (FIB, LFIB) Management Plane Internet Control Plane (RIB, LIB) Forwarding Plane (FIB, LFIB) Management Plane Control Plane (RIB, LIB) Forwarding Plane (FIB, LFIB) Management Plane Router2 Router4 Introduc)on to SDN & NFV Ericsson AB Page 9
10 Efficiency Physically Decoupling Control Plane Control Plane SDN (RIB, Controller LIB) Router1 Router3 Forwarding Plane (FIB, LFIB) Management Plane Forwarding Plane (FIB, LFIB) Management Plane Internet Forwarding Plane (FIB, LFIB) Management Plane Forwarding Plane (FIB, LFIB) Management Plane Router2 Router4 Introduc)on to SDN & NFV Ericsson AB Page 10
11 SoBware- Defined Networking Defini)on? Introduc)on to SDN & NFV Ericsson AB Page 11
12 SoBware- Defined Networking Defini)on Introduc)on to SDN & NFV Ericsson AB Page 12
13 SoBware- Defined Networking SDN ARCHITECTURE Introduc)on to SDN & NFV Ericsson AB Page 13
14 SDN Architecture "SDN- architecture- overview- transparent" by Open Networking Founda)on (ONF) - SDN Architecture Overview (PDF), Version 1.0, December 12, Licensed under CC BY- SA 3.0 via Wikimedia Commons Introduc)on to SDN & NFV Ericsson AB Page 14
15 Simplified SDN Architecture Directly programmable Applica)on Plane Centrally managed Programma2cally configured Control Plane Agile Data (Forwarding) Plane Open standards- based and vendor- neutral Introduc)on to SDN & NFV Ericsson AB Page 15
16 SDN Speed & Innova)on: Configuring Services SDN Controller App Introduc)on to SDN & NFV Ericsson AB Page 16
17 SDN Speed & Innova)on: Network Slicing Service Provider D (New) Service Provider C Enterprise Customer M2M Introduc)on to SDN & NFV Ericsson AB Page 17
18 SDN Speed & Innova)on: Network Slicing Wait!! That s MPLS!!!! No, It is centrally managed It is agile It is programma)cally configured It is SDN Introduc)on to SDN & NFV Ericsson AB Page 18
19 SoBware- Defined Networking OPENDAYLIGHT AND OPENFLOW Introduc)on to SDN & NFV Ericsson AB Page 19
20 SDN Controller SoBware Open and community driven ini)a)ves: OpenDaylight OpenContrail ONOS Project Floodlight Beacon NOX/POX Vendor specific ini)a)ves: Juniper Contrail Alcatel- Lucent Nuage OpenDayLight OpenContrail ONOS Lines of code 2.48 Millions 1.37 Millions 0.25 Millions Contributors Source: Introduc)on to SDN & NFV Ericsson AB Page 20
21 OpenDaylight An Open Source project to build a versa)le SDN Controller Par)cipants from many companies Pla)num members are Brocade, Cisco, Citrix, Dell, Ericsson, HP, Intel, and Red Hat. Includes support for mul)ple southbound protocols OpenFlow, OVSDB, NetConf, BGP- LS, PCE Northbound is principally RestConf with YANG Central core is a YANG drive Model Based Service Abstrac)on Introduc)on to SDN & NFV Ericsson AB Page 21
22 OpenFlow First standard communica)ons interface defined between the control and forwarding layers of an SDN architecture. Allows direct access to and manipula)on of the forwarding plane of network devices Allows switches from different suppliers to be managed remotely. Source: hwps:// resources/openflow/ Introduc)on to SDN & NFV Ericsson AB Page 22
23 OpenFlow Switch Where s my decoupling? Source: OpenFlow Switch Specifica)on. Version ( Protocol version 0x06 ) Introduc)on to SDN & NFV Ericsson AB Page 23
24 OpenFlow Switch Flow Tables Flow tables processed in order (pipelining) Egress processing is op)onal Source: OpenFlow Switch Specifica)on. Version ( Protocol version 0x06 ) Introduc)on to SDN & NFV Ericsson AB Page 24
25 OpenFlow Switch PING SDN Controller OFS Traffic Flow = ping Host1 Host2 Introduc)on to SDN & NFV Ericsson AB Page 25
26 OpenFlow Switch Ini)aliza)on Phase Hello Hello Answer Feature Request Set Config Feature Reply Feature Reply includes: Max packet buffer Number of tables Capabili)es: queues, flow tables, etc. Ac)ons: to perform on packets Port defini)on Introduc)on to SDN & NFV Ericsson AB Page 26
27 OpenFlow Switch ARP Flow ARP Request Packet IN: No flow. Send first bytes. Packet OUT: How packet should be forwarded. ARP Request ARP Reply Packet IN: No flow. Send first bytes. Flow MOD: How packet should be forwarded. ARP Reply Introduc)on to SDN & NFV Ericsson AB Page 27
28 OpenFlow Switch ICMP Flow ICMP Request Packet IN: No flow. Send first bytes. Flow MOD: How packet should be forwarded. ICMP Request ICMP Reply Packet IN: No flow. Send first bytes. Flow MOD: How packet should be forwarded. ICMP Reply Next ICMP Request Next ICMP Reply Introduc)on to SDN & NFV Ericsson AB Page 28
29 Network Func)on Virtualiza)on WHAT IS NFV? Introduc)on to SDN & NFV Ericsson AB Page 29
30 What is NFV? ETSI ini)a)ve (November 2012) Aims to transform the way that network operators architect networks Addresses hardware dependence: Consolidates many network equipment types onto industry standard high volume servers Implementa)on of network func)ons in sobware Source: Network Func)ons Virtualisa)on Introductory White Paper, ETSI Introduc)on to SDN & NFV Ericsson AB Page 30
31 NFV Benefits Reduced equipment costs and reduced power consump)on Reduc)on in variety of equipment for planning & provisioning Increased velocity of TTM Op)mizing network configura)on and/or topology in near real )me Hardware Hardware Hardware NAT DPI Firewall VM VM VM NAT DPI Firewall Hypervisor Source: Network Func)ons Virtualisa)on Introductory White Paper, ETSI Introduc)on to SDN & NFV Ericsson AB Page 31
32 NFV Architecture NFV Management and Orchestra)on OSS/BSS Service, VNF and Infrastructure Descrip)on Os- Ma Se- Ma Orchestrator Or- Vnfm EMS 1 EMS 2 EMS 3 Ve- Vnfm VNF Manager(s) VNF 1 VNF 2 VNF 3 Or- Vi NFVI Vn- Nf Vi- Vnfm Virtual Compu)ng Compu)ng Hardware Virtual Storage Virtualisa)on Layer Vl- Ha Storage Hardware Virtual Network Hardware resources Network Hardware Nf- Vi Virtualised Infrastructure Manager(s) Source: Network Func)ons Virtualisa)on (NFV); Infrastructure Overview, ETSI GS NFV- INF 001 V1.1.1 ( ) Introduc)on to SDN & NFV Ericsson AB Page 32
33 Simplified NFV Architecture OSS/BSS Service, VNF and Infrastructure Descrip)on Service, VNF and Infrastructure Descrip)on Management & Orchestra)on Orchestrator Or- Vnfm NFVI Element Management System EMS 1 Compu)ng Hardware EMS 2 VNF 1 VNF 2 VNF 3 Virtual Network Func)on Virtual Compu)ng NFV Infrastructure Virtual Storage EMS 3 Element Management & VNF Virtualized Resources Virtual Network Virtualisa)on Layer Vl- Ha Hardware resources Storage Network Hardware Hardware Virtualiza)on Layer (e.g. Hypervisor) Hardware Resources VNF Manager VNF Manager(s) Vi- Vnfm Virtualized Virtualised Infrastructure Infrastr. Manager(s) Manager Orchestrator Introduc)on to SDN & NFV Ericsson AB Page 33
34 NFV Ini)a)ves OPNFV (Open Pla{orm NFV Linux Founda)on) OpenNFV (HP) NFV on OpenStack (Miran)s) Introduc)on to SDN & NFV Ericsson AB Page 34
35 SDN and NFV SERVICE CHAINING Introduc)on to SDN & NFV Ericsson AB Page 35
36 Tradi)onal Networks Challenge THE CHALLENGE Transparent network func)ons act as a man in the middle SOLUTION 1 Put the NF as a bump- in- the- wire NF receives 100% of traffic, but only processes 20% of it SOLUTION 2 Use Policy Based Rou)ng PBR rules are sta)c and costly to maintain up- to- date OLen Inefficient, or Subscriber- Unaware & StaTc Introduc)on to SDN & NFV Ericsson AB Page 36
37 SDN Solu)on Service Chaining THE SOLUTION Use SDN/OpenFlow to intelligently steer traffic Central control FULL AWARENESS Subscriber aware Des)na)on aware Applica)on aware Performance aware THE RESULT Service Deployment in Minutes Opera)onal Simplicity Carrying live traffic today OFS OFS SDN Ctrl PersonalizaTon Faster Time to Market MulT tenancy Introduc)on to SDN & NFV Ericsson AB Page 37
38 SDN Service Chaining Firewall/AV Parental Control TCP/HTTP op)miza)on DPI, Charging &analy)cs CDN & TIC Media compression IPv44, IPv64 NAT Adver)sing, profiling, enrichment NFV (maybe) SDNc BNG/ PGW OFS OFS OFS Lower CAPEX costs Lower OPEX costs Faster Time to Market MulT tenancy VAS dimensioned just for the subscribers/traffic that needs it Formal network verifica)on & centralized troubleshoo)ng Opportunity for new func)ons Virtualiza)on and Abstrac)on (MVNO s, VPN s) Introduc)on to SDN & NFV Ericsson AB Page 38
39 SDN and NFV CONCLUSIONS Introduc)on to SDN & NFV Ericsson AB Page 39
40 SDN and NFV Advantages Efficiency Simplify network & opera)ons Speed Fast deployment of new services Innova)on Implement new business models Introduc)on to SDN & NFV Ericsson AB Page 40
41 SDN and NFV Highlights A defined architecture implemented through open standards. NFV is highly complementary to SDN, but not dependent on it (or vice- versa). SDN aligns closely with NFV objec)ves to use commodity servers and switches. Introduc)on to SDN & NFV Ericsson AB Page 41
42 Introduc)on to SDN and NFV QUESTIONS? Introduc)on to SDN & NFV Ericsson AB Page 42
43 Introduc)on to SDN & NFV Ericsson AB Page 43
44 SDN and NFV IETF WORKING GROUPS Introduc)on to SDN & NFV Ericsson AB Page 44
45 IETF SDN Working Groups Interface to Rou)ng System (I2RS) Defines an interface for policy manipula)on of rou)ng control Service Func)on Chaining (SFC) Other related groups in IRTF NFVRG suppor)ng research into the protocol implica)ons of virtualizing network func)ons SDNRG suppor)ng research into newer SDN ideas Introduc)on to SDN & NFV Ericsson AB Page 45
46 SDN Food for Thought Central controller (or centralized visibility or central policy engine) is not centralized control plane. Centralized Control Is Not Centralized Control Plane by Ivan Pepelnjak, blog on June 16, a more appropriate wording of the basic tenet of SDN is that it replaces the distributed control plane with a centralized management plane. SDN, NFV and all that by Yaakov Stein, IETF Journal, vol. 11, Issue 1, July 2015 Introduc)on to SDN & NFV Ericsson AB Page 46
47 But.. Introduc)on to SDN & NFV Ericsson AB Page 47
48 A Network is more than Routers! Introduc)on to SDN & NFV Ericsson AB Page 48
49 It s a set of boxes Introduc)on to SDN & NFV Ericsson AB Page 49
50 Actually, very simple white boxes Rules Control Plane Incoming Port White Box 3 Outgoing Port Incoming Flow Forwarding Plane Outgoing Flow Introduc)on to SDN & NFV Ericsson AB Page 50
51 Can be controlled by an SDN Controller SDN Controller Introduc)on to SDN & NFV Ericsson AB Page 51
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