Samrat Ganguly NEC ONS2015: http://bit.ly/ons2015sd ONS Inspire! Webinars: http://bit.ly/oiw-sd Watch the talk (video) on ONS Content Archives: http://bit.ly/ons-archives-sd

3. ProgrammableFlow for
Open Virtualized Data Center Network
NEC Corporation of America
Samrat Ganguly

4. Open Networking Summit 2011
Challenges in Today’s Data Center and Cloud Networks
Page 2
Performance scaling concerns
Reduced end-to-end bandwidth
Reduced End-to-end reliability
Reduced server utilization
Reduced end-to-end bandwidth
From spanning tree constraints
From High convergence time for SPT
From VM Migration constraint to single subnet
Bandwith decreases with server-server distance
Difficult to Scale Out and high Capex
Complexity scaling concern
Switch and port-wise configuration
Architecture/Policy design
Appliance Integration
Multi-Protocol Handling
Protocol, Application dependent
STP, MSTP, LAG, IS-IS, TRILL, …
Adds layers and routing complexity
Difficult to Automate and high Opex
Can Network Virtualization solve the challenges

5. Open Networking Summit 2011
NEC ProgrammableFlow Defining Network Virtualization
Network Virtualization Plane
One aggregated network view and control
Create abstract layer defining virtual networks
Hide physical network and protocol details
Automate network creation and deletion
serversSwitchesLinksVirtualizedNetwork
Page 3

6. Open Networking Summit 2011
Virtual Networks
serversSwitchesLinksVirtualizedNetwork
Page 4
Virtual Router
Virtual Bridge
Virtualized Physical Network
• Hides physical switches, ports, network topology, protocols
• Zero switch/port level configuration on deployment
• Automatically optimizes underlying network resources
Automated Deployment on Physical Network

7. Open Networking Summit 2011
Multi-tenant Virtual Networks on one Physical Network
Page 5
Any Physical Network Topology
Virtual Network 1
(L2)
Virtual Network 2
(L2 + L3)
Physical Network

8. Open Networking Summit 2011
Optimizing the physical network
Page 6
Virtual Network 1
(L2)
• Automatically discovers multiple paths
• Automatically avoids loops
• Automatically balances flows across paths
• No route flapping
Physical Network

9. Open Networking Summit 2011
Adding End-to-End Reliability
Page 7
Virtual Network 1
(L2)
• Automated monitoring of switch/link status
• Automatically re-recomputed alternate path
• Automatically shifts flows to alternate path
• Fast due to avoiding convergence time as in STP
Physical Network

10. Open Networking Summit 2011
High Level Virtualization Architecture
Any interconnection topology
OpenFlow Enabled Switch | From Any vendor
Network Virtualization Plane
OpenFlow Control
Virtual
Network 1
Virtual
Network
Virtual
Network2 3NEC Products (GA)
NEC ProgrammableFlow
Controller
NEC ProgrammableFlow
Switch
-48 port 10G / 4 port 40G
-48 port 1G / 4 port 10G
Page 8
OpenFlow

11. Open Networking Summit 2011
NEC Network Virtualization Stack Controller
OpenFlow Network Control
Dynamic Configuration of Switch Forwarding table | Statistics
Virtual Network Translation
Auto-translation to Physical
Network forwarding tables
Multi Virtual Tenant Network Provisioning
Multiple independent virtual networks and policies
Virtual Network Construction framework
vBridges, vRouters, vLink, vFilters, vRedirects
CLI | API | Management console
OpenFlow Switches
OpenFlow Control Protocol
Page 9

12. Open Networking Summit 2011
Why Virtualize? – Key Benefits
Page 10
• Ability to hide physical network complexity
• Ability to create, edit, delete virtual network on-demand
• Ability to create and operate independent virtual networks
• Automation through APIs
• Automated multipath scaling
• Automated end-to-end reliability
• Zero switch/port configuration while in operation
• Easy to change physical network while in operation

13. Open Networking Summit 2011
Conditional Routing
Page 11
Destination-based routing
Network forwards packet
based on destination
src
dst
Conditional Flow (Routing using Pflow vFilter+vRedirect)
Network forwards flow packets
based on matching condition
src
dst
?
If (Condition matched)
Route to egress port/switch
OpenFlow Network

14. Open Networking Summit 2011
Appliance Networking: Composing Conditional Flow
Page 12
?
??
? ?
WAN
To Internet