SOFTWARE-DEFINED NETWORKING AND OPENFLOW · SDN Approach to Network Analytics Network Analytics App...
Transcript of SOFTWARE-DEFINED NETWORKING AND OPENFLOW · SDN Approach to Network Analytics Network Analytics App...
SOFTWARE-DEFINED NETWORKING AND OPENFLOW Eric Choi < [email protected]>
Senior Manager,
Service Provider Business Unit,
APJ
© 2012 Brocade Communications Systems, Inc. EPF 7 2012/09/17
Software-Defined Networking (SDN): Fundamental Control Plane Paradigm Shift
• Decouples the integrated control plane in routers to improve network flexibility and manageability
• External controllers augment the control plane and make forwarding decisions for a set of flows
• A group of technologies that open the data, control, and management planes of the network through APIs
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Network Controller
Control Plane
Control Plane
Router OS
Data Plane
SDN Network Architecture: The Big Picture
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Cloud-Optimized Network Stack
Key Benefits
Enabling Technologies
Cloud Management Layer Automation and Orchestration
Cloud APIs: OpenStack, VMware, Microsoft,
CloudStack
Services Layer Personalization and Monetization
Programmatic Control: OpenFlow; OpenScript
Network Virtualization Layer Flexibility and Efficient Asset Utilization
Overlay Networking: VXLAN, NVGRE, STT; MPLS
Network Fabric Layer Reliability and Simplicity
Any-to-Any Connectivity: Ethernet Fabrics; IP Routing
Who is behind OpenFlow: Open Networking Foundation (ONF)
• ONF launched publicly in March, 2011
• The ONF defines OpenFlow and API specifications
• Founding members of ONF are network operators:
• Support from more than 70 major companies since the launch
• Recent interest from the IETF in provisioning protocols
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OpenFlow Overview
• Protocol that enables communication between an OpenFlow controller and an OpenFlow router • Control plane decisions for a defined set of
flows are made by the controller, which typically runs on a server
• Other control plane decisions and all data plane forwarding is still done by the router
• Router and controller communicate via the OpenFlow protocol, which defines messages
• Router maintains flow tables, which are maintained by the controller using APIs
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OpenFlow Controller
Control Plane
Control Plane
Router OS
Data Plane Flow Table
OpenFlow Client
OpenFlow Router Operation
• Flow table contains entries that define a flow based on the packet header
• Flows are sorted by priority as defined by the controller, highest priority flows match first
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Flow Table
Flow Action Counters
Flow Action Counters
Flow Action Counters
Flow Action Counters
Flow Action Counters
?
ü
û
Add, Remove, Modify VLAN Tag Forward to a Port List
Drop Send Packet to Controller Forward Via Control Plane
Does the packet belong to this flow?
Ingress Port
MAC DA
MAC SA
Ether Type
VLAN ID
IP Src
IP Dst
IP Protocol
TCP/UDP Src Port
TCP/UDP Dst Port
802.1p Bits
IP DSCP
Layer 2 Layer 3
OpenFlow Applications: What can you do with OpenFlow?
• OpenFlow itself does not define or mandate any specific application, it’s just an interface into the control plane
• Enables a large set of applications due to its flexibility to program the network based on any external criteria • Cost • Time of day • Latency • Security • Traffic policy • Load
• Ideal for automation in highly orchestrated environments where you want to precisely control network behavior
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Physical Network Infrastructure
DC 2 DC 1
Network Virtualization
• OpenFlow used as an overlay in an existing network to add exception rules to create new services
• Hybrid port mode: OpenFlow does not affect other traffic on the same port, enforced in hardware
• Allows for OpenFlow service development without risk on top of the existing production network
Hybrid Port Mode: OpenFlow Overlay
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Existing Network Control Plane
OpenFlow Overlay
Protection Layer
Existing Network
Management
OpenFlow Controller
Data Center With 1000s of Virtual and Physical Servers
Data Center Network Virtualization
• vSwitches connect virtual machines, ToR switches connect physical machines
• Tunnels enable physical network abstraction
• SDN gateways enable scalable connectivity into the logical network
• Programmatic interface to server infrastructure with OpenFlow
Scalable Cloud Services
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VM VM VM
PHY PHY
VM VM VM
PHY PHY
VM VM VM
PHY PHY
Data Center Physical Infrastructure
L2 over L3 Tunnels Tunnels Tunnels Tunnels
Network Analytics Application and SDN Controller
• SDN/OpenFlow Controller uses north bound APIs for application development
• SDN/OF Controller provisions network using OpenFlow
• OpenFlow to networks • For traffic replication from WAN to
Analytics Network • For traffic replication from Analytics
Network to Analytic tools
• Analytic tools provide for reporting and analytics
SDN Approach to Network Analytics
Network Analytics App
10 ©2012 Brocade Communications Systems, Inc. PROPRIETARY AND CONFIDENTIAL — Discussed with under NDA 10
SDN/OpenFlow Controller
SDN Apps
OpenFlow
APIs
Analytics Network
Tool 1 Tool 2 Tool 3 Tool 4
Tool 5
10
3rd party analytic tools
10
100 GE and 10GE WAN
APIs
Extending Clouds Across Data Centers
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Internet
Data Center A
Openflow
Router
Servers
Fibre Channel SAN
Storage
Data Center B
SAN Extension
SLB
Servers
SLB
WAN
GSLB Controller
Server
Storage
Server
SAN Extension Fibre Channel
SAN
Openflow
Router
Openflow Controller
On Demand Tunnel w/VLAN Rewrite
Extending Clouds Across Data Centers, contd
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Internet
Data Center A
Openflow
Router
Servers
Fibre Channel SAN
Storage
Data Center B
SAN Extension
SLB
Servers
SLB
WAN
GSLB Controller
Server
Storage
Server
SAN Extension Fibre Channel
SAN
Openflow
Router
Openflow Controller
Universal Extension for VM Motion
Universal Extension for VM Motion
Where is the ONF and OpenFlow headed?
• OpenFlow 1.3 received preliminary approval in April • Post review approval in June, and work on 1.3.1 (clean up) • 1.4 was originally planned for late summer, but delayed
• ONF would like to see more adoption of 1.3 • Stabilize the specification at a good version • Go back to original approach of OpenFlow 1.0 which requires working
code before a new feature is standardized
• Need open reference implementations to help promote adoption and testing
• Forwarding Abstractions Working Group (FAWG) is working to make OpenFlow support on more hardware platforms easier
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Further Information
• Open Networking Foundation https://www.opennetworking.org/index.php
• Intro to OpenFlow https://www.opennetworking.org/standards/intro-to-openflow
• Brocade OpenFlow Page http://www.brocade.com/launch/sdn/openflow.html
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Questions?
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