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danny http://dannykim.me/danny/57771 2014.02.11 14:34:58 (*.193.128.184) 592 >>> Purpose This document helps us understand how QoS works in OpenVSwitch. This document can be used as a ... 阅读全文
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我们这一节来看Port一般来说一个Port就是一个Interface，当然也有一个Port对应多个Interface的情况，成为BondVLAN ConfigurationPort的一个重要的方面就是VLAN Configuration，有两种模式：trunk port，这个port不配置tag，配... 阅读全文
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http://blog.scottlowe.org/2012/10/19/link-aggregation-and-lacp-with-open-vswitch/In this post, I’m going to show you how to use link aggregation (via ... 阅读全文
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Bonding is aggregation multiple links to single link in order to increase throughput and achieve redundancy in case one of links fails. At least, offi... 阅读全文
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In part one we showed how to create Openvswitch extension and submit it to Microcore repository. There were also presented after-install steps for Ope... 阅读全文
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In a previous tutorial we showed how to install Openvswitch on Qemu image with Microcore Linux. At the end of tutorial we created Openvswitch extensio... 阅读全文
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In May 2011, I read a request for installation Openvswitch on Qemu image. I started to play with Openvswitch and finally became fan of this project. I... 阅读全文
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http://www.jdccie.com/net-tec/lacp%E5%AD%A6%E4%B9%A0%E7%AC%94%E8%AE%B0/一、LACP简介1、LACP协议简介基于 IEEE802.3ad 标准的LACP（Link Aggregation Control Protocol，链路汇聚... 阅读全文
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PS：tcpdump是一个用于截取网络分组，并输出分组内容的工具，简单说就是数据包抓包工具。tcpdump凭借强大的功能和灵活的截取策略，使其成为Linux系统下用于网络分析和问题排查的首选工具。tcpdump提供了源代码，公开了接口，因此具备很强的可扩展性，对于网络维护和入侵者都是非常有用的工具。... 阅读全文
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这一节我们来分析MirrorMirror就是配置一个bridge，将某些包发给指定的mirrored ports对于包的选择：select_all，所有的包select_dst_portselect_src_portselect_vlan对于指定的目的：output_port (SPAN)outpu... 阅读全文
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这一节，我们重点看sFlow采样流sFlow（Sampled Flow）是一种基于报文采样的网络流量监控技术，主要用于对网络流量进行统计分析。sFlow系统包含一个嵌入在设备中的sFlow Agent和远端的sFlow Collector。其中，sFlow Agent通过sFlow采样获取本设备上的... 阅读全文
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As virtualization shifts the network edge from top of rack switches to software virtual switches running on the hypervisors; visibility in the virtual switching layer is essential in order to provi... 阅读全文
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Figure 1: Low latency software defined networking control loop The articles SDN and delay and Delay and stability describe the critical importance of low measurement delay in constructing stable ... 阅读全文
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With network virtualization, the software switches (such as Open vSwitch) on the servers act like the edge switches. So, to gain insights into the net... 阅读全文
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(image from Anatomy of an open source cloud)A cloud data center consists of large numbers of physical servers, each running a hypervisor with one or m... 阅读全文
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我们这一节主要来看ControllerController有两种:Primary Controller: 真正控制vswitch的flow table，vswitch会保持和controller的连接，如果失败，取决于bridge的fail mode。一个vswitch可以连接多个Controll... 阅读全文
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Openvswitch是一个virutal swtich， 支持Open Flow协议，当然也有一些硬件Switch也支持Open Flow协议，他们都可以被统一的Controller管理，从而实现物理机和虚拟机的网络联通。Open Switch定义了一系列Flow Table，通过它来控制包的流向... 阅读全文
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As an introduction this chapter is aimed at readers who are familiar with the Web, HTTP, and Apache, but are not security experts. It is not intended ... 阅读全文
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1. Introduction Mutual SSL authentication or certificate based mutual authentication refers to two parties authenticating each other through verifying the provided digital certificate so that both pa... 阅读全文
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There are two places that SSL will need to be configured if SSL is to be used between the controller and the Open vSwtich. The instructions below assu... 阅读全文