openflow book

future network will surely be like this: the underlying data path switches and routers are "dumb, simple, and minimal ", it also defines an open public API for streaming tables, and uses controllers to control the entire network. In the future, researchers will be able to freely call the underlying API on the Controller for programming, so as to realize network innovation. OpenFlow is a powerful promoter of this network innovation idea. The

One, openflow to solve what problem?1. First, a brief introduction to what is SDN, the traditional network is the computing route of each node itself, SDN is centralized control of the route. In a data center network, there is only one controller, the following can be connected to multiple switches. After the controller has calculated the route, the flow table is sent to the switch, and the switch is forwarded according to the flow table. Run on the t

Many people do not understand the difference between openflow and Sdn. It is not surprising that these two technologies are closely related, so many people have such doubts. However, they are not interchangeable. Openflow is a protocol that uses a process like an API (Application Programming Interface) to set up a network switch. SDN is a term used to describe the highly automated configuration of network s

SDN (Software Defined Networking) SDN is not equal to OpenFlow, its relationship is similar to the Internet is not equal to IP protocol, PSTN is not equal to 7th signaling, IMS does not equal to the sip,web system is not equal to the HTTP protocol. OpenFlow is only the SDN controller control forwarding Surface Equipment protocol, the controller's own architecture, network topology algorithm, operating envir

This paper focuses on the instruction set of the OpenFlow switch specification, which profoundly affects the processing behavior of the packet in switch, starting from the following sections.1, instructionsEach flow entry contains a series of instructions that are executed on a packet that successfully matches the flow entry, resulting in changes to the header information, Action The update of set or change the processing behavior of pipeline processi

Software Definition X has become increasingly popular. Software is eating the world. The same is true for Software Defined networks. Both in the industrial and academic fields will be a great revolution. They are all following the direction of this industry, looking for their own research points, and paying attention to the development of standardization. Various controllers and prototype systems have emerged one after another. Some of them are SDN debug and security. In short, they make the eco

Openflow-enaling innvation in Campus Networks Problems occurred Background Networks has become part of the critical infrastructureOf our businesses, homes and schools. Because of the huge installation base of equipment and protocols and the reluctance to use production flow to carry out experiments, network innovation has encountered a huge bottleneck, people think that the network has been rigid. There's no good way to tr

White Paper (version):function (openflow half-yearly upgrade)flowtable Flow table: consists of a number of flow table items, each of which is a forwarding rule. The packet that goes into the switch is queried by the flow table to obtain the destination port for forwarding. The flow table entry consists of a header field, a counter and an operation, where the head field is a 10-tuple, which is the identification of the flow table item, and the counter

OpenFlow is an exchange technology that uses the OpenFlow protocol to establish a Software Defined network. It can manage the network as a whole rather than countless independent devices. Currently, many vendors have begun to consider using the OpenFlow protocol. 1. Traditionally, the Spanning Tree Protocol or some other new standards (such as multi-link transpar

Recently see the POF code to see the headache, but fortunately is done, the rest is the idea of POF can be integrated into the code of the EPC, I also for the future 5G point of view is not? First of all, say what POF is.Introduction to POFThe full name of the POF (Protocol oblivious Forwarding) is the protocol is not aware of forwarding, Huawei proposed an improved forwarding method on the OpenFlow, this way do not need to know the protocol is what t

Environment: Xcode5.1+ios7.1+openflow+ipadDescription: In view add Openflow,xib is the other view for automatic layout, the ipad horizontal screen when the horizontal line is not full screen, modify the OpenFlow Refreshcoverflow method is as follows: //Set the size of the OpenFlowAfopenflowview *coverflowview = [[Afopenflowview alloc] Initwi

IPhone SDKDevelopment BasicsOpenFlowProgramming is a small part of this article. When the user interface needs to display images by PAGE, useOpenFlowFunction provided by the Library, the user interface image to be displayed is displayed on pages, making programming very quick. This Library provides the same visual effects as the OS X desktop Finder program, as shown in 3-46OpenFlowLibrary page by page for the image display program, you can press the screen to scroll around the display, double-cl

Ios + openflow problems, iosopenflow Environment: xcode5.1 + ios7.1 Requirement: Add B view to the scroll attempted by A. [A addSubview: B. view] Problem: 1. View B is loaded to view A, but the image of Openflow is not loaded. After debugging, the proxy of openflow is not loaded. -- "viewDidAppear method of View B is executed; Cause analysis: If a view cont

A long time not to blog, mainly because of laziness. Not much nonsense to say, now let this can only record their own learning process. What's the OpenFlow architecture, and what's good for me. If you don't understand, go ahead and see. Go directly to the topicMy platform: PC (Linux ubuntu 13.10), as well as the floodlight and Mininet mentioned in the title, also use the virtual machine software, I use VirtualBox. This architecture is as follows:The f

Recently has been learning Ryu controller, in the process of use, found the following aspects of the advantages: Ryu controller is written in Python language, in the understanding and speed is very fast; The Ryu controller's overall architecture is clear, In the future, I will organize an architectural article about the Ryu controller for your reference; The Ryu controller itself is a powerful network experimental platform that is very well compatible with OpenStack and is not very familiar to O

Environment: xcode5.1+ios7.1Requirement: A attempted scroll to join B view; "A Addsubview:b.view"Problem:1. b view is loaded into a view, but OpenFlow's picture is not loaded. After debugging is OpenFlow the agent is not loaded. --The Viewdidappear method of B view is run;Analysis Reason:Suppose that a view included in a viewcontroller is added directly to a view. Just like this:[View1 AddSubView:viewController.view], so that our viewcontroller will n

Comparison between openflow and traditional vswitches in layer-2 Forwarding (1) L2 forwarding and Vlan traps Generally, after a string of bits in the physical layer are connected to the data link layer, frames are formed and verified. Only frames that pass the verification are forwarded. The concept of forwarding is MAC address-based forwarding for vswitches. The first layer-2 forwarding device is only based on MAC addresses and is used in LAN ), lat

-community/getting-started-for-developers/downloads-and-documentation2) Set Java_home• At the end of the profile file, add:Export java_home=/usr/share/jdk1.6.0_14Export path= $JAVA _home/bin: $PATHExport classpath=.: $JAVA _home/lib/dt.jar: $JAVA _home/lib/tools.jarNeed to sign in again.3)./bin/karaf4) View the currently installed featureFeature:list-i5) Install the necessary feature6) Open Web pageHttp://yourip:8181/index.html=====================================================================

resource usage Ideas:In L2 ~ Adds data stream feature information differentiation based on L4 Network InformationAudio streams, video streams, and plain text streamsSuch as the data stream type, so as to set different timeout values for the stream data packet table items of different stream types, to maximize the use of stream table resources while meeting the processing capabilities of the controller, this improves the matching rate of the stream table. Disadvantages:Only data streams

Book inventory plays an important key business data for warehouse management operations in books. Development at any age now promotes blood circulation in books, book types and update speed are just as fast rising.In order to ensure a foothold in the book industry, to ensure the correct purchase and inventory control and delivery. In order to avoid the backlog of