sdn openflow

issued because the default gateway is a qr-net1: When the package is routed to the Br-int, it is forwarded to the qr-net1 so that it enters the internal router1 of compute node1. Find the route in ir1 and find that the target address belongs to net2. The ARP table in ir1 contains static ARP entries of all VMS. Therefore, if the target address is VM2, an ARP entry exists and no ARP request is sent. ARP tables are maintained in the neutron-l3-agent. This ARP table is modified when a VM is added o

qvo48e06cd2-60 is connected to the Br-int, openstack uses such a complex mechanism, rather than directly connecting the tap device to the open vswitch, which is related to the security group, you can view the official documentation. Before studying the ovs, we should first note that there is a "tag: 1" under the Port "qvo48e06cd2-60", this tag is open vswitch to distinguish different subnets. Here, tag1 indicates our 10.18.0.0/24 subnet, and tag2 indicates the 10.22.22.0/24 subnet. The Br-int a

Object Storage clusters. Openstack Block Storage-as the second complete version of the openstack block storage component, this update provides a complete set of storage services for managing heterogeneous storage environments from a centralized access point. A new smart scheduler provides cloud end users with the ability to allocate storage space based on loads, which can be defined based on performance, efficiency, or cost effectiveness. At the same time, this update provides support for mor

-i386 -machine accel=kvm -m 2048 mininet-vm-disk1.vmdk -net nic,model=virtio -net user,net=192.168.101.0/24,hostfwd=tcp::8022-:22The above command will be set to ssh forward from the 8022 VM host port.similarities : Using a transport plane similar .vmdk files can be .hdd used in an image similarity, and then create a new virtual machine using the .hdd image as its virtual drive. Start the virtual machine. Log on to the virtual machineLog on to the virtual machine using the following user name an

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

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

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

this port number is in which IP, which port, which container is executed. As the user does not need to modify any code (such as compatible with what ZOOKEEPER/ETCD God horse), do not care. Even this port is followed by multiple remote IPs that make up a client-based high availability. The agent can even do something wrong to change a backend and try again.With this artifact, the capacity to expand, release changes, failure to replace is easy. Containers are freely added and deleted. Once the ne

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

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

documents in the enterprise, document Center, allow employees to upload documents, upload documents on their hard drive to the door, and then use online collaboration to edit document functions Integrated enterprise search, Enterprise Search Center, set crawl, search all information in the enterprise Integration of people, openshare default to each employee has set up a personal site, this personal site also associated with the enterprise microblogging, blog and other functions, in shor

Version:Ovs 1.7.1 Abbreviation:DP-> datapath, of-> openflow, SW-> Switch Background: The packet matching process can be said to have the greatest impact on the efficiency of a switch. Many manufacturers (including some research institutes) have said that it can achieve stream table matching that is 10 times more efficient than ovs. Of course, this is possible. After all, it is pure software and it is very easy to innovate. Ovs does not have a mul

MTU Max transmission UnitThe basis of transmitting shards in IP layerICMP can simply be considered as the most basic control message of IPPing uses answer requests and replies to echo two typesTracert leverages the TTL and ttlexceeded types of the IPThere are seven types of NIC binding modes in Linux: 0. Round robin,1.active-backup,2.load Balancing (XOR), 3.fault-tolerance (broadcast), 4.LACP, 5.transmit load balancing, 6. Adaptive load Balancing. corresponding Bond0~bond7 respectivelyWhat do yo

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