SDN: New Approach to Networking Guru Parulkar [email protected] 1.
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Transcript of SDN: New Approach to Networking Guru Parulkar [email protected] 1.
Nick McKeown, Guido Appenzeller, Nick Bastin, David Erickson, Glen Gibb, Nikhil Handigol, Brandon Heller, TY Huang, Peyman Kazemian, Masayoshi Kobayashi, Jad Naous, Johan van Reijendam, Srini Seetharaman, Rob Sherwood, Dan Talayco, Paul Weissman, Tatsuya Yabe, KK Yap, Yiannis Yiakoumis and many more.
With Scott Shenker and team at Berkeley and Martin Casado at Nicira
Team at Stanford
Million of linesof source code
6000+ RFCs
Billions of gates Bloated Power Hungry
Vertically integrated, complex, closed, proprietaryNot suitable for experimental ideas
Specialized Packet Forwarding Hardware
OperatingSystem
Feature Feature
Routing, management, mobility management, access control, VPNs, …
Problem with Internet Infrastructure?
Not good for network owners & users; Not good for researchers.
Forwarding
OS
Forwarding
OS
Forwarding
OS
Problem: No Abstractions for Control Plane
• Addition of a new function to the network– Highly complex distributed system problem
• Networks too difficult to program and to reason about– no good abstractions and interfaces
4
Router/Switch/Appliance
Router/Switch/Appliance
Router/Switch/Appliance
DistributedNetwork Functions
State Distribution Mechanism
Not good for even network vendors
5
Cloud Provider Today• Assign VMs to any server without considering L2/L3 scalability• Support multiple tenants with lots of VMs interconnected • Support each tenant with its own customized network for VMs:
topology, bandwidth, security, load-balancingAnd everything is dynamic
Load balancers
Firewalls
IDS’s
?VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
Tenant-A
VM
VM
VM
VM
VM
VM
VM
VM
VM
VM
VM
VMVM
VM
VM
VM
VM
VM
Tenant-B
VM
VM
VM
VM
VM
VM VM
VM
Tenant-C
Network is the long pole
Other Descriptions of the Problem
• Network requires device oriented low level config and
management
• Network is not programmable plug-n-play component
– for private and public cloud infrastructure and services
Routing TE
Network OS
Open interface (OpenFlow) to Forwarding Abstraction: L1/L2/L3
Well-defined open API
Software-Defined Networkwith Key Abstractions in the Control Plane
PacketForwarding
PacketForwarding
PacketForwarding
Separation of Data and ControlPlane
Network MapAbstraction
Mobility
ProgrammableBasestation
Network OS
Global Network View
Abstract Network Model
Control ProgramNetwork Virtualization
Software Defined Networkwith Virtualization
9
Innovation/Research Enabled?
Nation-wide SDN InfrastructurePart of NSF’s GENI
SDN Reference
Example Research Enabled• Data center: energy conservation, routing, and management • Seamless use of diverse wireless networks• Network based load balancing• Packet/circuit convergence, traffic engineering• Simpler control plane for converged packet/circuit MPLS nets• Slicing and remote control/management of home networks • Distributed snap shot of VMs (by DOCOMO researchers) • Inter-domain routing with pathlets (by UIUC) • Redundant traffic elimination [for CDNs] (by Univ of Wisconsin)• And many more …
200+ OpenFlow/SDN deployments around the world!!
13
Example Demonstrations
Onrc.stanford.edu/videos.html
Stanford/Berkeley SDN Activities With Partners
2007 20112008 2009 2010
Ethane
Dem
oD
eplo
ymen
tPl
atfor
m D
evel
opm
ent
OpenFlow Spec v0.8.9 v1.0 v1.1
Reference Switch NetFPGA Software
Network OS NOX SNAC Beacon
Virtualization FlowVisor FlowVisor (Java)
Tools Test Suite oftrace MininetMeasurement tools
GENI software suite Expedient/Opt-in Manager/FOAM
Stanford University ~45 switch/APs ~25userIn McKeown Group
CIS/EE BuildingProduction Network
US R&E Community GENI: 8 Universities + Internet2 + NLRMany other campuses
Other countries Over 68 countries(Europe, Japan, China, Korea,Brazil, etc.)
VM Migration(Best Demo)
Trans-PacificVM Migration
Baby GENI Nation Wide GENI “The OpenFlow Show” – IT World
SDN Concept(Best Demo)
SIGCOMM08 GEC3 SIGCOMM09 GEC6 GEC9Interop
2011
+Broadcom
Not Just Research
All parts of networking industry embracing OpenFlow and SDN
65+ companies joined ONF in a year
65+ companies from across the industry
“IBM & NEC Team Up to Enable Industry Innovators Tervela & Selerity to Transform their Networks w/ OpenFlow”
“NEC Adds 10/40GbE OpenFlow Switch to Award-Winning ProgrammableFlow Product Line.”
“Nicira Comes Out Of Stealth Mode With “Game-Changing” Network Virtualization Platform”
“Brocade Leads OpenFlow Adoption to Accelerate Network Virtualization and Cloud Application Development.”
“Pica8 launches 3920.”
“HP Simplifies Networking with Broadest Choice of OpenFlow-enabled Switches, Feb. 2, 2012”
SDN Exhibits by 20+ Companies at ONS-12
Why does the industry care?
21
Confidential and proprietary materials for authorized Verizon personnel and outside agencies only. Use, disclosure or distribution of this material is not permitted to any unauthorized persons or third parties except by written agreement. 22
Why Does Verizon Care?
© 2011 Verizon. All Rights Reserved.
Stu Elby @Open Networking Summithttp://OpenNetSummit.org/
23
Carrier Networks TodayThey want to offer• VPN Services• Traffic EngineeringAnd other value added services
Router Operating
System
DistributedNetwork Functions
IGP- Route Advert, Link-State
TE Label Distribution
VPN-IPv4 Route Advert
E-BGP learned Route Advert
PE Label Distribution
Distributed Network Functions each with their own
State Distribution Mechanisms
OSPFv2
RSVP-TE
MP-BGP
I-BGP + RRLDP
State Distribution Mechanisms
Go to vendors and ask them for solutions:
Vendors find it hard to develop solutionsProviders find it too slow and too expensive
to deploy and operate Providers depend too much on vendors
Carrier Networks (MPLS) with SDN
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Routing Discovery Label Distribution RecoverySimpler
Control Plane(2)
Simpler Cheaper
Multi-VendorData Plane
(1)
SWAP POPPUSH
Vendor-agnostic Open Interface
NETWORK OPERATING SYSTEM
TE 2.0
Services / Network Applications
(3) VPN
~4K vs. ~600k lines of code
Video of a Demonstration
showing MPLS-TE service with the Map Abstraction
Onrc.stanford.edu/videos.html
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Transport Network
IP Network
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Converged Packet/Circuit with SDN
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Network OS
Interface: OpenFlow Protocol
Packet & Circuit Switches
Converged Network
Unified ControlPlane
1. Common Flow Abstraction
2. Common Map Abstraction
Converged Packet/Circuit with SDN
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Network OS
Interface: OpenFlow Protocol
Packet & Circuit Switches
Converged Network
Unified ControlPlane
1. Common Flow Abstraction
2. Common Map Abstraction
Routing TE QoS Application across packet and circuits
Prototype
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Hybrid Packet-Circuit Switches
Packet switches
NOX
Video of a Demonstration
of network applicationon Prototype
Onrc.stanford.edu/videos.html
30
Capex Savings with Converged SDN
67%
Architecture:
1. Replace BRs with hybrid MPLS-OTN (packet-optical)
switches
2. Full mesh topology of variable bandwidth circuits used for recovery and BoD
3. Use of SDN based unified control plane
NTT To Offer Global IaaS Leveraging OpenFlow TechnologyBy Chad Berndtson, CRN
June 11, 2012 9:46 AM ET
35
Enterprise Networking
Enterprise network operators want..
• Firewall and access control
• Delegate management to departments
• Lots of VLANs that stretch across buildings
• By-pass bottlenecks/check points for specific applications
• Host web services with load balancing
• Easy guest wireless access with security
And more
How do they do it today?
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Enterprise Network: Today’s solution
• Proliferation of appliances• Increased management complexity
- Device oriented management- Each device type has its own management
• High Capex, high Opex• Too much reliance on vendors
Load balancer
IDS
Firewall Load balancer
IDS
Firewall
ACL
ACL
ACL
ACL
ACL
Enterprise Network with SDN
Load balancer
IDS
Firewall Load balancer
IDS
Firewall
ACL
ACL
ACL
ACL
ACL
NETWORK OPERATING SYSTEM
LoadBalancing IDS Access
ControlPolicy
Routing
Vender-agnostic Open Interface
Simple, CheaperMulti-vendorData Plane
CentralizedControl Plane
NETWORK OS
IDS AccessControl
Financial Department
NETWORK OS
Policy Routing
Research Labs
And you can even delegate control to someone else
What Stanford IT and others are exploring …
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Data Center Provider Today• Assign VMs to any server without considering L2/L3 scalability• Support multiple tenants with lots of VMs interconnected • Support each tenant with its own customized network for VMs:
topology, bandwidth, security, load-balancingAnd everything is dynamic
Load balancers
Firewalls
IDS’s
?VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
Tenant-A
VM
VM
VM
VM
VM
VM
VM
VM
VM
VM
VM
VMVM
VM
VM
VM
VM
VM
Tenant-B
VM
VM
VM
VM
VM
VM VM
VM
Tenant-C
39
VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VM
VM VM VMVM
VM
VM
VM
VM
VM
VM
VM
VM
VM
VM
VMVM
VM
VM
VM
VM
VM
VM
VM
VM
VM
VM
VM VM
VM
Cloud Provider with SDN
VMVMVMVM VMVMVMVM VMVMVMVM
LoadBalancing Firewall
Tenant-A
NETWORK OS
VM VM VM VM VM VM
Tenant-B
NETWORK OS
LoadBalancing IDS
VM VM VMVM VM VM VMVM
Tenant-C
NETWORK OS
Firewall IDSLoadBalancing
Berkeley and Stanford establish Open Networking Research Center (onrc.net)
with 12 founding members
Scope of Activities
OF Switch
OpenRadio
FlowVisor ProgSystems
Mininet& Tools
Scalability
Reliability
Security
Flow Space
Network Map
Virtual Network
Big Connector
NetworkOS-wireless
Systems
Abstractions
Xlities
NetworkOS
Feature
Network OS
OFSwitch
OFSwitch
OFSwitch
OFSwitch
Logical Map of Network
Network HyperVisorVirtual Network
Programming System/Tools
Big ConnectorFeature Feature
OpenRadio
Domains of Use
Enterprise Networks
Datacenter Networks
Service Provider Networks
Cellular Networks
Home Networks
Scope of Activities Cont.
OF Switch
OpenRadio
FlowVisor ProgSystems
Mininet& Tools
Scalability
Reliability
Security
Flow Space
Network Map
Virtual Network
Big Connector
NetworkOS-wireless
Systems
Abstractions
Xlities
NetworkOS
OFSwitch
ONRC: Open Networking Research Center
BerkeleyScott Shenker
Open Network LabExec Director: GuruVP Eng: Bill Snow
12-15 Engineers/Tech Leads
Open Source SDN Stack for Growing Community
Develop, Deploy, Support Open Source SDN
PhD/Postdocs
Research
StanfordNick McKeownGuru ParulkarSachin Katti
ON.LAB is Recruiting
Motivated talented software engineers who are passionate about• working with SDN leaders• developing open source SDN
stack • changing the world of
networking and also• working at a very nice fun
facility in Palo Alto down town
Interested? Visit http://onlab.us/
“OpenFlow and Software Defined Networking (SDN) are not only here to stay, but they will
define the future of networking.”
Network World, 10/18/2011
