Exibir código-fonte para Palestra: Software Defined Networks: History, Hype and Hope

= Anotações =

*Roots of SDN
*SDN widely accepted as "future of networking"
*Think of SDN as a programming model
*Key of internet Sucess: Layers
*importance of layering


*other fields in "systems" : OS, BD, ...
*teach basci principles
*

*network


*Just delivering packets is no enough

*New Needs of delivering packets

*New Boxes,Coltrol mechanics

*More Complex "Control Plane"

*MasterComplexity
*Extract SSimplicity

*Network has never made the distinction
*Force people to make the transition

*Netqorking has now hit its complexity limits
*The era of ad hoc control mechanisms is over

*Exemple of transition: programming
**Abstrations key to extracting simplicty

Modern languages > Machine Languages

*"The power of Abstraction" on Youtube
*"Modularity based on abstraction is the way things get done"  barbara Liskov

*Layers are great abstration, for the data plane
*We have no abstration for the control plane



*Operate witout communication guarantess
*Compute the configuration of each pyshical device
*Operate withe given network-lever procotocl

*Abstract view of the network


*Forwarding Abstration

*OpenFLow uses flow entre on the frm <header,action>



*SDN is defined precisely by these abstrations
**Distribued state
**Specficaton
**forwarding



*Network Operating System


*major Change in Paradigm
**Control program: configuration = function(view)
**easier to write, verify, maintain, reason about

*"Embracing some abstrations"


*From OpenFLow to Fabrics
**Limitations fo the hardware



*The Hope
**Separating control and data planes
**Network is now a software proble
***Think of control planes as program, not a protocol