OpenFlow技术详解.pptVIP

The Stanford Clean Slate Program The Stanford Clean Slate Program The Stanford Clean Slate Program The Stanford Clean Slate Program The Stanford Clean Slate Program The Stanford Clean Slate Program The Stanford Clean Slate Program The Stanford Clean Slate Program OpenFlow Outline OpenFlow Enabling innovation on campus Standard way to control flow-tables in commercial switches and routers Being deployed at Stanford Consider deploying it at your campus too Innovations in campus wiring closets Experiments we’d like to do Mobility management Network-wide energy management New naming/addressing schemes Network access control Problem with our network Paths are fixed (by the network) IP-only Addresses dictated by DNS, DHCP, etc No means to add our own processing OpenFlow Switching A way to run experiments in the networks we use everyday. Bring GENI to college campuses. A “pragmatic” compromise Allow researchers to run experiments in their network… …without requiring vendors to expose internal workings. Basics An Ethernet switch (e.g. 128-ports of 1GE) An open protocol to remotely add/remove flow entries Experimenter’s Dream(Vendor’s Nightmare) Standard Network Processing hw sw Experimenter writesexperimental codeon switch/router User- defined Processing No obvious way Commercial vendor won’t open software and hardware development environment Complexity of support Market protection and barrier to entry Hard to build my own Prototypes are flakey Software only: Too slow Hardware/software: Fanout too small (need 100 ports for wiring closet) Furthermore, we want… Isolation: Regular production traffic untouched Virtualized and programmable: Different flows processed in different ways Equipment we can trust in our wiring closet Open development environment for all researchers (e.g.