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Now you can take a sigh of relief. Software Defined Network (SDN) has become a reality, because Cisco has finally begun to "Embrace" it, which also marks the end of all kinds of "Cynicism. However, I cannot help but think of network virtualization because Cisco promotes the development of SDN. Network virtualization is different from SDN. It is completely differe

is especially important. At the beginning of the VPCNG design, considering that the on-line process should be transparent to the user, without affecting the existing business situation, the smooth upgrade to the new architecture, so in the upgrade scheme design is also more complex.The entire upgrade process is split into four phases.Stage1 Routing Table Data MigrationThe most difficult thing to do in a smooth upgrade of a large distributed system is the seamless migration of control data. VPCN

provide and OpenFlow protocol, topology and other related information query and configuration, the results of the query returned to the browser in JSON format, and the configuration will call related functions of the relevant modules, you can simply see the code to get the switch in the SDN network. The command to get switches is: http://ip:port/stats/switches, which first resolves the HTTP request (GET), and the required content (switches), and then

complexity, this is also the essence of TCP/IP, smart compression in the C jun and D Jun, as D Jun saw the content in the package is crying, laughing, dead, live, A Jun and B Jun is no matter. So where is the complexity? Complexity is added by future generations! It is not the core of TCP/IP. If we maintain the core of TCP/IP and connect the gully between June A and June B with A bridge like the San Francisco bridge, the efficiency will be greatly improved, therefore, QoS is the transmission ne

The story of the top ten data centers of the Year in 2017: data centers in 2017 The hybrid cloud partnership, large-scale public cloud collapse, the impact of cloud computing on the host hosting industry, and the design of ultra-large scale networks were one of the most popular stories in the data center industry in 2017. 10. Microsoft simulates the entire Azure network to prevent interruptions. In the case of ultra-large scale, copying an enterprise network is only for testing, 9. How cloud co

As an important technology of network virtualization, VXLAN has received much attention. How does this protocol work? How can we achieve SDN network through separation of data and control layer? How to deploy it? This blog will introduce you in detail... I. Why Vxlan? 1. limits on the number of VLANs 4096 VLANs far cannot meet the needs of large-scale cloud computing data centers 2. Restrictions on physical network infrastructure IP subnet-based Regi

The vro market will double in the next year According to IHS Infonetics's latest series of reports, the global network market shows uneven performance in various fields. For example, the global data center network [note] device market revenue in first quarter of 2015 was only $2.6 billion, down fourth quarter of 2014 from 14%. However, in the first quarter of this year, the bare metal exchange market showed vitality, with port shipments increasing by 12% year on month. Cliff Grossner, data cent

Virtual Route Solution Overview: OpenContrail, Vyatta, RouteFlow (1) Preface -- about virtual Routing Can SDN or OpenFlow open up a new era for the routing market? The open-source software switch represented by OpenvSwitch has promoted the development of the SDN industry for a while. However, there are few open-source software-based routers or routing solutions. To this end, this article introduces three s

languages, but mastering at least one, preferably two or three, languages can help you become more efficient and more popular.1.PythonWhenever you ask an expert, you can be sure that Python will be one of the two or three languages they first mentioned. Why? First, Python is easy to learn. In fact, if you're in college with programming classes, Python is probably the first language to learn. In addition, it is not necessary to compile, which makes debugging fast and easy. It is a common l

1. White box switch? What's white box switching and white box switches?White box switches refers to the ability to use ' generic, ' off-the-shelf switching (or white box switching) and routing ha Rdware, in the forwarding plane of a software-defined network (SDN). White box switches is really just that– ' blank ' standard hardware. They represent the foundational element of the commodity networking ecosystem required to enable organizations to pick an

Mirantis, one of the benchmark companies in the OpenStack field, released the latest MOS 8.0 version in early March 2016. This paper tries to make some inductive analysis based on the public data.1. Version Overview 1.1 overview Community version: Liberty, the default integrated components include ceilometer,Cinder,Glance,Heat,Horizon, Ironic (first support),Keystone,Murano (an application catalog, first-time support),Neutron (using Open vSwitch 2.3.1, enhanced L3 HA VRRP, support for IPAM,

2016 Huawei Developer ContestHuawei Developer Challenge 2016 is a large-scale software competition for developers across the country, dedicated to providing open and comprehensive development support services across Huawei's product portfolio, finding innovative seeds and incubating innovative solutions to promote Huawei's competitive market. Help developers to achieve business innovation, the success of the developers dream of innovation. Contest Content Coverscloud Computing, IoT, Openlife, Ca

"Cloud computing network Zhu Ji Nanxiong"Basic informationLi JunwuPublishing house: Electronic Industry publishing houseisbn:9787121253775Last Date: 2015-2-6Publication date: March 2015Folio: 16 OpenPage: 275Edition: 1-1 "Cloud computing network Zhu Ji Nanxiong"Content Introduction"Cloud computing network Zhu Ji Nanxiong" focuses on the principles of network technology used in cloud computing network virtualization, focusing on the underlying context o

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 the packet can be forwarded out. It can improv

"Summary"Iperf is a network performance testing tool, it can be easily used for SDN network bandwidth and network quality testing,Iperf Support protocol, timing, Configuration adjustment of buffers and other parameters, reporting tcp/udp Maximum bandwidth, delay jitter, packet loss and other statistics. 1 Iperf Installation Iperf Installation method has a variety, you can download the source code compiled installation, you can also directly use the c

software. However, data storage has already broken through the restrictions of specific content, access to data resources other than the file system." SAP can improve the performance of its trex search system through the search engine technology included in NetWeaver, and thus create search indexes for organized and unorganized data. Microsoft recently released a new search tool to manage users' searches based on company data in multiple locations. The tool's code name is "oneview". Microsoft's

questions about software-defined storage are dispelled.Overview In the current data center, the I/O path from the application to the storage device is particularly long, including many layers or stages. For details, click here, in addition, the interfaces between these layers are still not transparent (like tunnel), which makes enforce an end-to-end policy (for example, for different tenant, different storage bandwidth is required, for example, hot data and cold data, such as customers of diffe

In a production environment, we will encounter disks with partitions larger than 2T (e.g. add a 3TB storage), because the MBR partition table only supports 2T disks, so a disk larger than 2T must use the GPT partition tableWhile Fdisk does not support GPT partitioning, we can use parted to operate on GPT disks. Parted function is very powerful, both command line can also be used for interactive, at the prompt input parted will enter the interactive mode, if there are more than one disk, we need

parse data packets layer by layer at the protocol stack level. The so-called router is a layer-3 device, and the switch is a layer-2 device, firewalls are classified into two-layer firewalls and three-layer firewalls... the PF_RING device can directly DMA data packets from the NIC chip to the memory on your machine. That's all. Then, you can process data packets through an application instead of the kernel protocol stack, as for how your application processes data packets, I will list the follo

computing, network and storage restrictions, significantly increasing QoS and user experience.Objective of SDS The goal of SDS is the same as that of the software-defined network. SDN goals can be divided into two dimensions: horizontal optimization capability; vertical Optimization, is software integration that controls the plane and data plane. From the perspective of high-level applications (compared with low-level LUN and RAID), Application Deplo