sdn and nfv
TRANSCRIPT
So#ware Defined Networking (SDN) & Network Func8on Virtualiza8on (NFV)
A Study Note
Agenda
• Reference and Credit • Mo5va5on • Architecture • Impact
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Reference and Credit • [OpenFlow white paper](hFp://archive.openflow.org/documents/openflow-‐wp-‐latest.pdf) • [Stanford Seminar -‐ SoMware-‐Defined Networking at the Crossroads](hFps://www.youtube.com/watch?v=WabdXYzCAOU ) • [Study Notes and Conversa5on with Larry Pearson, AT&T Labs] • [SDN and NFV Abstrac5on](
hFp://www.slideshare.net/Alcatel-‐Lucent/sdn-‐and-‐nfv-‐whats-‐the-‐buzz-‐about-‐marcus-‐weldon-‐president-‐of-‐bell-‐labs-‐and-‐corporate-‐chief-‐technology-‐officer)
• [SDN and NFV Components](hFp://www.slideshare.net/Alcatel-‐Lucent/network-‐func5ons-‐virtualiza5on-‐cloudband-‐and-‐the-‐nfv-‐ecosystem-‐dor-‐skuler-‐vice-‐president-‐and-‐general-‐manager-‐cloudband)
• [SDN and NFV Difference](hFp://www.sdncentral.com/technology/nfv-‐and-‐sdn-‐whats-‐the-‐difference/2013/03/ ) • [Big Data Analy5cs](hFp://www.alcatel-‐lucent.com/solu5ons/mo5ve-‐big-‐network-‐analy5cs ) • [Change OSS](hFp://www.heavyreading.com/details.asp?sku_id=3082&skuitem_itemid=1515 ) • [AffirmedNetworks](hFp://www.affirmednetworks.com/ ) • [virtualiza5on telecom](hFps://www.youtube.com/results?search_query=virtualiza5on+telecom&sm=3 ) • [demo](hFp://www.sdncentral.com/sdn-‐blog/best-‐sdn-‐nfv-‐demonstra5ons-‐2013-‐sdncentral/2013/12/) • [contrail abstrac5on](hFp://opencontrail.org/the-‐importance-‐of-‐abstrac5on-‐the-‐concept-‐of-‐sdn-‐as-‐a-‐compiler/)
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So#ware Defined Networking History Stanford University • Run experimental protocol • Exploit a common set of func5ons
that runs in many switches and routers,
• Provide a open protocol to control different switches and routers in a unified way.
• à Openflow
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OpenFlow – A Standard for SoMware Defined Network Tradi8onal networks • Many protocols: STP, RIP, OSPF,
BGP … • Vendor specific • Switch for L2 and Router for L3
SDN/OpenFlow • OpenFlow Controller soMware
handles all computa5on and logic • Common APIs • Flow forwarding for L2-‐L4
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Transforming To Open Plaoorm from: Open Networking Founda5on
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Transforming To Virtual Appliances
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SDN Abstrac8ons (Study Notes and Conversa8on with Larry Pearson, AT&T Labs/Open Networking Founda8on)
Control Program • Expresses operator goals • Implemented on global network view
abstrac5on • Computes forwarding state for each
switch Network Opera5ng System (NOS) • Links global view and physical
switches • Gathers informa5on for global
network view • Conveys configura5on from control
program to switches Switches • Implement configura5on provided by
NOS
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So#ware Defined Networking (SDN) Model (from Study Notes and Conversa8on with Larry Pearson, AT&T Labs/Open Networking Founda8on)
Applica8on Layer • Orchestra5on • Real-‐5me control of services • Real-‐5me access to data Control Layer • Control soMware interacts with
applica5ons (northbound) • Orchestra5on interface • Real-‐5me control of services • Real-‐5me input to services • Service/device configura5on/state
persistence Control • SoMware interacts with services/
devices (southbound) using OpenFlow protocol
Infrastructure Layer • Services/devices interact with the
control layer (northbound) using OpenFlow protocol
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OpenDaylight Controller Architecture Network Apps & Orchestra8on: • Applica5ons that use the network for
communica5on • Business and network logic
applica5ons that control, and monitor network behavior.
Controller PlaOorm: • The framework in which the SDN
abstrac5ons can manifest; • Provides a set of common APIs to the
app layer (the NB API) • Implements one or more protocols
for command and control of the physical hardware (the SB API).
Physical & Virtual Network Devices: • Physical & virtual devices, switches,
routers, etc
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Open Daylight-‐ Hydrogen Release (Dec 2013) (from hWp://www.opendaylight.org)
Controller Components: • Topology Manager • State Manager • Switch Manager • Host Tracker • Shortest Path Forwarding • Network Configura5on • Affinity Service • Openstack Service • LISP Service • VTN Manager • DOVE Manager • Service Abstrac5on Layer (SAL)
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Floodlight Controller
Network Func5on Virtualiza5on (NFV)
• Network Func5ons Virtualiza5on is about implemen5ng network func5ons in soMware -‐ that today run on proprietary hardware -‐ leveraging (high volume) standard servers and IT virtualiza5on
• Supports mul5 -‐ versioning and mul5-‐tenancy of network func5ons • Allows use of a single physical plaoorm for different applica5ons, users and tenants
– Enables new ways to implement resilience, service assurance, test & diagnos5cs and security surveillance
– Facilitates innova5on towards new network func5ons and services that are only prac5cal in a pure soMware network environment
– Applicable to any data plane and control plane func5ons, (fixed or mobile networks)
• Opportuni5es for pure soMware players • New methods for interlinking virtualized services & func5ons • NFV aims to ul5mately transform the way network operators architect and operate their
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Virtualize Network Func8on (VNF) (from hWp://www.ieO.org/proceedings/88/slides/slides-‐88-‐opsawg-‐6.pdf )
• All compute nodes, all storage nodes • Components: • Switching: BNG, CG-‐NAT, routers. • Mobile network nodes: HLR/HSS, • MME, SGSN, GGSN/PDN-‐GW, RNC.
• Home routers and set top boxes. • Tunnelling gateway elements. • Traffic analysis: DPI. • Signalling: SBCs, IMS.
• Network-‐wide func5ons: AAA servers,
• policy control. • Applica5on-‐level op5misa5on: CDNs, • Load Balancers. • Security func5ons: Firewalls,
intrusion • detec5on systems.
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VNF Forwarding Graph • Efficiency. Compute resources
assigned to func5on and network capacity sized to current load and shareable across func5ons.
• Resiliency. In some cases, backup func5on and network capacity can be shared
• Agility. Shorter deployment intervals for upgrades and new features since func5ons are soMware based
• Expressiveness. Virtualized switching func5ons and/or configura5on of VNFs can implement forwarding graphs in a more straighoorward and efficient manner.
• Flexibility. Reduce configura5on complexity. Support new service and business models: deployments in other operator's network, third-‐party datacenters…
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Typical Mobile Network (diagram from Alcatel/Lucent)
• All compute nodes, all storage nodes • Components: • Switching: BNG, CG-‐NAT, routers. • Mobile network nodes: HLR/HSS, • MME, SGSN, GGSN/PDN-‐GW, RNC.
• Home routers and set top boxes. • Tunneling gateway elements. • Traffic analysis: DPI. • Signaling: SBCs, IMS.
• Network-‐wide func5ons: AAA servers,
• policy control. • Applica5on-‐level op5miza5on: CDNs, • Load Balancers. • Security func5ons: Firewalls,
intrusion • detec5on systems.
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Wireline & Wireless Network Convergence • Landline (copper & op5cal) • 2.5G/3G/4G mobile • IMS • Mul5-‐Media content
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Benefits and Impacts • Easy experimenta5on with new ideas • Rapid deployment, reloca5on, upgrading, and
turn-‐off of both networking and value-‐added services,
• De-‐couple service from hardware • Ability to flexibly locate network func5onality
wherever it is most effec5ve or less expensive, • Rapid development of network applica5on • Automate network app onboarding • Simplifica5on of network maintenance and
upgrade • Real 5me elas5c scaling • Poten5al to combine mul5ple network func5ons
on a single plaoorm.
• complexity manageable within each layer – Networking challenges are solved for each layer in
each layer
• Rapid innova5on, layer by layer – So long as the interfaces don’t change, each layer
is evolved independently
• Mul5ple orders-‐of-‐magnitude change in – Speed, scale, diversity of use, …
• Data center virtualiza5on and automa5on • Network infrastructure sharing • Big data gevng bigger and big network analy5c • New and more compe5tors • SoMware based
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Thank You for Listening!
Richard Kuo
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OPEN DATA CENTER ALLIANCE ORCHESTRATION, ERICSSON AND ALCATEL-‐LUCENT VIEWS, …
Backup Slides
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Summary Points of Key SDN and NFV (from hFp://www.sdncentral.com/technology/nfv-‐and-‐sdn-‐whats-‐the-‐difference/2013/03/)
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Open Data Center Alliance Master Usage Model: Service Orchestra5on Rev. 1.0
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Open Data Center Alliance Master Usage Model: Service Catalog and Orchestra5on Life Cycle Rev. 1.0
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Ericsson View on Cloud & NFV
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Alcatel-‐Lucent View
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